CVE-2022-45060 : What You Need to Know
Learn about CVE-2022-45060, a security flaw in Varnish Cache versions 5.x, 6.x, 7.x, and 7.2.x allowing HTTP/2 pseudo-header injection, leading to invalid HTTP/1 requests and potential server exploitation.
A security vulnerability labelled as CVE-2022-45060 has been identified in Varnish Cache versions 5.x, 6.x, 7.x, and 7.2.x before specific releases. This vulnerability could allow an attacker to manipulate HTTP/1 requests by injecting invalid characters through HTTP/2 pseudo-headers.
Understanding CVE-2022-45060
Varnish Cache versions 5.x, 6.x, 7.x, and 7.2.x before 6.0.11, 7.1.2, and 7.2.1, respectively, are affected by an HTTP Request Forgery issue.
What is CVE-2022-45060?
CVE-2022-45060 is an HTTP Request Forgery vulnerability found in Varnish Cache software. It allows attackers to introduce malicious characters through HTTP/2 pseudo-headers, leading to the generation of invalid HTTP/1 requests.
The Impact of CVE-2022-45060
This vulnerability could enable malicious actors to exploit backend servers behind Varnish servers by leveraging the production of invalid HTTP/1 requests.
Technical Details of CVE-2022-45060
The following technical details shed light on the specifics of this security flaw:
Vulnerability Description
The issue arises from the handling of HTTP/2 pseudo-headers that are incompatible with standard HTTP/1 request line formats, causing the Varnish server to craft erroneous HTTP/1 requests to backend servers.
Affected Systems and Versions
Varnish Cache versions 5.x, 6.x, 7.x, and 7.2.x before 6.0.11, 7.1.2, and 7.2.1, respectively, are impacted by this vulnerability.
Exploitation Mechanism
Exploitation involves injecting manipulative characters via HTTP/2 pseudo-headers to induce Varnish servers in generating flawed HTTP/1 requests to backend systems.
Mitigation and Prevention
To address CVE-2022-45060, consider the following mitigation strategies:
Immediate Steps to Take
- Update Varnish Cache to versions 6.0.11, 7.1.2, or 7.2.1, where the vulnerability is patched.
- Monitor for any unusual HTTP request activities that might indicate exploitation of this issue.
Long-Term Security Practices
- Regularly update Varnish Cache to the latest versions to ensure protection against known vulnerabilities.
- Implement network security measures to detect and prevent potential HTTP request manipulation attacks.
Patching and Updates
Stay informed about security updates released by Varnish Cache and promptly apply patches to address any new vulnerabilities.