CVE-2023-50269
HIGHSquid 2.6-2.7.STABLE9 3.1-5.9 6.0.1-6.5 - Denial of Service via Large X-Forwarded-For Header
Title source: llmDescription
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.
References (7)
Core 7
Core References
Vendor Advisory
https://security.netapp.com/advisory/ntap-20240119-0005/
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/
Third Party Advisory x_refsource_confirm
https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3
Broken Link x_refsource_misc
http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch
Broken Link x_refsource_misc
http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch
Scores
CVSS v3
8.6
EPSS
0.5763
EPSS Percentile
99.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-674
Status
published
Products (3)
squid-cache/squid
2.6
squid-cache/squid
2.7 (10 CPE variants)
squid-cache/squid
3.1 - 5.9
Published
Dec 14, 2023
Tracked Since
Feb 18, 2026