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CVE-2022-37797

Date: September 11, 2022

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.

Language: C

Severity Score

Related Resources (8)

https://security-tracker.debian.org/tracker/CVE-2022-37797
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://nvd.nist.gov/vuln/detail/CVE-2022-37797
https://people.canonical.com/~ubuntu-security/cve/CVE-2022-37797
https://www.mend.io/vulnerability-database/CVE-2022-37797

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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