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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-38165
• 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/[email protected]/message/7YMUHFJJWTZ6HBHTYXVDPNZINGGURHDW/
• https://lists.fedoraproject.org/archives/list/[email protected]/message/K6PZF7JNTFCOJ62HXZG4Q2NEHSZ6IO2V/
• https://lists.fedoraproject.org/archives/list/[email protected]/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
• https://www.openwall.com/lists/oss-security/2021/08/07/11
• https://www.openwall.com/lists/oss-security/2021/08/07/7
• 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