CVE-2026-69184— c-ares DNS压缩指针链致CPU耗尽拒绝服务漏洞
一分钟漏洞结论
影响对象
c-ares c-ares
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
c-ares is an asynchronous resolver library. Prior to 1.34.7, ares_dns_name_parse() enforces backward DNS compression pointers but does not bound the total pointer hops or assembled name length. A malicious DNS server can send a response containing a long desce
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一、 漏洞 CVE-2026-69184 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
c-ares: CPU-exhaustion denial of service via unbounded DNS name compression pointer chains
来源: CVE Program / CVE List V5
Vulnerability Description
c-ares is an asynchronous resolver library. Prior to 1.34.7, ares_dns_name_parse() enforces backward DNS compression pointers but does not bound the total pointer hops or assembled name length. A malicious DNS server can send a response containing a long descending pointer chain and many resource records whose NAME or RDATA fields refer to the chain, causing repeated decompression work that grows quadratically with message size. A single crafted response can stall the single-threaded c-ares event loop and deny DNS resolution, without causing memory corruption or information disclosure. This issue is fixed in version 1.34.7.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-69184 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
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CVE-2026-69184 补丁与修复 (4)
CVE-2026-69184 厂商安全公告 (1)
CVE-2026-69184 厂商页面 (1)
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🔗 Release 1.34.7 · c-ares/c-ares · GitHub x_refsource_MISC
IV. Related Vulnerabilities
V. Comments for CVE-2026-69184
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