CVE-2022-37797 Null dereference in n/a
An attacker can crash the lighttpd web server by sending an invalid websocket handshake, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-37797?
CVE-2022-37797 is a high-severity vulnerability in Debian Debian Linux, published on 12 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-476
Which versions are affected by CVE-2022-37797?
It affects 2 products.
Linux distribution packages (5)
lighttpd SUSE:Package Hub 15 SP3 | All versions | 1.4.66-bp154.2.3.1 |
lighttpd SUSE:Package Hub 15 SP4 | All versions | 1.4.66-bp154.2.3.1 |
lighttpd openSUSE:Leap 15.3 | All versions | 1.4.66-bp154.2.3.1 |
lighttpd openSUSE:Leap 15.4 | All versions | 1.4.66-bp154.2.3.1 |
lighttpd openSUSE:Tumbleweed | All versions | 1.4.66-1.1 |
Products include Debian Debian Linux, Lighttpd Lighttpd.
How do I fix CVE-2022-37797?
Apply the vendor's patch.
Is CVE-2022-37797 being exploited?
There is no known exploitation of CVE-2022-37797 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2022-37797, DLA-3133-1, GHSA-cm5p-p299-9f4g, UBUNTU-CVE-2022-37797, openSUSE-SU-2022:10132-1, openSUSE-SU-2024:12327-1.