CVE-2022-37797

In lighttpd 1.4.65, mod_wstunnel does not initialize a handler function pointer if an invalid HTTP request (websocket handshake) is received. It leads to null pointer dereference which crashes the server. It could be used by an external attacker to cause denial of service condition.

• CWE-476

• https://lists.debian.org/debian-lts-announce/2022/10/msg00002.htmlMailing List, Third Party Advisory
• https://redmine.lighttpd.net/issues/3165Exploit, Issue Tracking, Third Party Advisory
• https://security.gentoo.org/glsa/202210-12Third Party Advisory
• https://www.debian.org/security/2022/dsa-5243Mailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/10/msg00002.htmlMailing List, Third Party Advisory
• https://redmine.lighttpd.net/issues/3165Exploit, Issue Tracking, Third Party Advisory
• https://security.gentoo.org/glsa/202210-12Third Party Advisory
• https://www.debian.org/security/2022/dsa-5243Mailing List, Third Party Advisory

Published

Sep 12, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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