#VU25016 Reachable Assertion in Varnish Cache

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Main Vulnerability Database Vulnerabilities #VU25016

#VU25016 Reachable Assertion in Varnish Cache

Published: February 7, 2020


Vulnerability identifier: #VU25016
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Varnish Cache
Software vendor:
Varnish Software

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion. when using Varnish with a TLS termination proxy, and the proxy and Varnish use the PROXY version 2 protocol to communicate connection details. A remote attacker can send a specially crafted request to the server, cause assertion failure and restart the application, resulting in denial of service condition.


Remediation

Install updates from vendor's website.

External links