Lighttpd · Lighttpd · CVE-2022-37797
**Name of the Vulnerable Software and Affected Versions**
lighttpd version 1.4.65
**Description**
The issue is related to the mod wstunnel module in the lighttpd web server, which is connected to pointer dereference errors. If an invalid HTTP request, specifically a websocket handshake, is received, the handler function pointer is not initialized, leading to a null pointer dereference that crashes the server. This could be exploited by a remote attacker to cause a denial of service condition.
**Recommendations**
For lighttpd version 1.4.65, as a temporary workaround, consider disabling the mod wstunnel module until a patch is available. Restrict access to the websocket handshake endpoint to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.