CVE-2023-50269
high-risk
Published 2023-12-14
Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.
Do I need to act?
~
1.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.6/10
High
NETWORK
/ LOW complexity
Affected Vendors
References (14)
Third Party Advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3
Third Party Advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3
50
/ 100
high-risk
Severity
29/34 · Critical
Exploitability
4/34 · Minimal
Exposure
17/34 · Moderate