#VU69126 Inconsistent interpretation of HTTP requests in Varnish Cache - CVE-2022-45059
Published: November 8, 2022 / Updated: November 28, 2022
Vulnerability identifier: #VU69126
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2022-45059
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Varnish Cache
Varnish Cache
Software vendor:
Varnish Software
Varnish Software
Description
The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers. Among the headers that can be filtered this way are both Content-Length</code> and <code>Host, making it possible for an attacker to both break the HTTP/1 protocol framing, and bypass request to host routing in VCL.
Remediation
Install updates from vendor's website.