What’s Vulnerable › Vulnerabilities

CVE-2022-37797

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-09-12 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• Debian Linux: 10.0
• lighttpd: 1.4.65

References

• https://lists.debian.org/debian-lts-announce/2022/10/msg00002.html
• https://redmine.lighttpd.net/issues/3165
• https://security.gentoo.org/glsa/202210-12
• https://www.debian.org/security/2022/dsa-5243
• https://lists.debian.org/debian-lts-announce/2022/10/msg00002.html
• https://redmine.lighttpd.net/issues/3165
• https://security.gentoo.org/glsa/202210-12
• https://www.debian.org/security/2022/dsa-5243

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