What’s Vulnerable › Vulnerabilities

CVE-2021-38165

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-07 · updated 2026-06-17
• Weakness: CWE-522

Description

Lynx through 2.8.9 mishandles the userinfo subcomponent of a URI, which allows remote attackers to discover cleartext credentials because they may appear in SNI data.

Affected products

• Debian Linux: 9.0, 10.0
• Fedoraproject Fedora: 33, 34, 35
• Lynx Project Lynx: through 2.8.9

References

• http://www.openwall.com/lists/oss-security/2021/08/07/11
• http://www.openwall.com/lists/oss-security/2021/08/07/12
• http://www.openwall.com/lists/oss-security/2021/08/07/9
• https://bugs.debian.org/991971
• https://github.com/w3c/libwww/blob/f010b4cc58d32f34b162f0084fe093f7097a61f0/Library/src/HTParse.c#L118
• https://lists.debian.org/debian-lts-announce/2021/08/msg00010.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKNK7GQBJBUBMJVNKVC7RTCYWUYMFJQW/
• https://lynx.invisible-island.net/current/CHANGES.html
• https://www.debian.org/security/2021/dsa-4953
• https://www.openwall.com/lists/oss-security/2021/08/07/1

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