CVE-2022-37797 — HIGH (7.5)

Vulnerability 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.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Lighttpd	Lighttpd	1.4.65
Debian	Debian Linux	10.0

Related Weaknesses (CWE)

CWE-476

References

https://lists.debian.org/debian-lts-announce/2022/10/msg00002.htmlMailing ListThird Party Advisory
https://redmine.lighttpd.net/issues/3165ExploitIssue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202210-12Third Party Advisory
https://www.debian.org/security/2022/dsa-5243Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00002.htmlMailing ListThird Party Advisory
https://redmine.lighttpd.net/issues/3165ExploitIssue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202210-12Third Party Advisory
https://www.debian.org/security/2022/dsa-5243Mailing ListThird Party Advisory

FAQ

What is CVE-2022-37797?

CVE-2022-37797 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ser...

How severe is CVE-2022-37797?

CVE-2022-37797 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2022-37797?

Check the references section above for vendor advisories and patch information. Affected products include: Lighttpd Lighttpd, Debian Debian Linux.