CVE-2022-37797

Public Exploit

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.26%
Vendor Advisory debian.org Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://redmine.lighttpd.net/issues/3165 third party advisory issue tracking exploit
https://www.debian.org/security/2022/dsa-5243 vendor advisory mailing list third party advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00002.html third party advisory mailing list
https://security.gentoo.org/glsa/202210-12 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-37797?
CVE-2022-37797 has been scored as a high severity vulnerability.
How to fix CVE-2022-37797?
To fix CVE-2022-37797, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-37797 being actively exploited in the wild?
It is possible that CVE-2022-37797 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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