HTTP: Squid Proxy HTTP X-Forwarded-For Header Handling Denial of Service
This signature detects attempts to exploit a known vulnerability against Squid Proxy. A successful attack can result in a denial-of-service condition.
Extended Description
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.
Affected Products
Squid-cache squid
Short Name
HTTP:DOS:SQUID-X-FRWD-FOR
Severity
Major
Recommended
False
Recommended Action
Drop
Category
HTTP
Keywords
CVE-2023-50269 Denial HTTP Handling Header Proxy Service Squid X-Forwarded-For of
Release Date
05/15/2024
Supported Platforms
srx-branch-19.3
vsrx3bsd-19.2
srx-19.4
vsrx3bsd-19.4
srx-branch-19.4
vsrx-19.4
vsrx-19.2
srx-19.3
Sigpack Version
3705
False Positive
Unknown
Vendors
Squid-cache