CVE-2022-37797

high

Description

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.

References

https://redmine.lighttpd.net/issues/3165

https://www.debian.org/security/2022/dsa-5243

https://lists.debian.org/debian-lts-announce/2022/10/msg00002.html

https://security.gentoo.org/glsa/202210-12

Details

Source: MITRE

Published: 2022-09-12

Updated: 2022-12-03

Type: CWE-476

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH