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地图 / no_proxy IDN mismatch: Unicode hostnames bypass proxy exclusion list

no_proxy IDN mismatch: Unicode hostnames bypass proxy exclusion list

访问控制 / 访问控制缺陷(通用) / #3650443

厂商
curl
严重程度
未评级
赏金
—
弱点
访问控制缺陷(通用)
研究员
@mzfr
披露日期
2026-04-07
资产
https://github.com/curl/curl
CVE
CVE-2022-42916CVE-2022-43551

该报告还没有中文解读。

原文摘录

摘自原文(2253 字符中的一小部分)
Unicode (IDN) hostnames in `no_proxy` are never converted to punycode before comparison, so they never match the request hostname (which curl has already converted to punycode). A user who types `no_proxy="bücher.de"` and requests `http://bücher.de/` expects the proxy to be bypassed. Instead curl …
原文中的代码
LANG=C.UTF-8 http_proxy=http://127.0.0.1:18877 no_proxy="bücher.de" ./curl -v "http://bücher.de/"
# Output: "Failed to connect to xn--bcher-kva.de port 80 via 127.0.0.1"
# curl tried the proxy despite no_proxy matching the URL hostname

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 @mzfr · 版权归作者与 curl 所有

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