CVE-2022-37797 : Vulnerability Insights and Analysis

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 a denial of service condition.

Understanding CVE-2022-37797

This section provides insights into the nature and impacts of CVE-2022-37797.

What is CVE-2022-37797?

CVE-2022-37797 relates to a vulnerability in lighttpd 1.4.65 where mod_wstunnel fails to initialize a handler function pointer, resulting in a null pointer dereference and potential server crash.

The Impact of CVE-2022-37797

The vulnerability allows an external attacker to exploit an invalid HTTP request, leading to a denial of service condition.

Technical Details of CVE-2022-37797

Explore the technical aspects of CVE-2022-37797 in this section.

Vulnerability Description

The vulnerability arises from the failure to initialize a handler function pointer, causing a null pointer dereference and server crash.

Affected Systems and Versions

All systems running lighttpd 1.4.65 with mod_wstunnel are affected by CVE-2022-37797.

Exploitation Mechanism

External threat actors can trigger the vulnerability by sending an invalid HTTP request, specifically during the websocket handshake.

Mitigation and Prevention

Discover the steps to mitigate and prevent CVE-2022-37797 in this section.

Immediate Steps to Take

System administrators should apply the security updates provided by the vendor to address the vulnerability promptly.

Long-Term Security Practices

Maintain good security practices, such as regular system updates and monitoring, to prevent similar vulnerabilities in the future.

Patching and Updates

Ensure that the affected systems are patched with the latest updates to protect them from potential exploitation.