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地图 / Integer Overflow in curl_multi_get_handles() Leading to Heap Buffer Overflow

Integer Overflow in curl_multi_get_handles() Leading to Heap Buffer Overflow

内存破坏 / 经典缓冲区溢出 / #3575245

厂商
curl
严重程度
低危
赏金
—
弱点
经典缓冲区溢出
研究员
@knickers
披露日期
2026-02-26
资产
https://github.com/curl/curl
CVE
—

该报告还没有中文解读。

原文摘录

摘自原文(6213 字符中的一小部分)
Integer Overflow in curl_multi_get_handles() Leading to Heap Buffer Overflow
原文中的代码
// lib/multi.c:3728-3729
unsigned int count = Curl_uint32_tbl_count(&multi->xfers);
CURL **a = curlx_malloc(sizeof(struct Curl_easy *) * (count + 1));  // OVERFLOW when count == UINT_MAX
// When count == 0xFFFFFFFF: count + 1 = 0, malloc(0) returns non-NULL
// Subsequent a[i++] = data writes to …

默认不展示报告全文。以上为简短摘录,完整复现过程请阅读原文。版权归研究员与 curl 所有。

时间线

  • 报告提交
  • 公开披露
阅读 HackerOne 原文 ↗作者 @knickers · 版权归作者与 curl 所有

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