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High severity · published Dec 14, 2023
CVE-2023-50269
Squid is a caching proxy for the Web
7.5
CVSS
57.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)57.6% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SQ
Squid · Squid-cache
3.1 through 5.9; 6.0.1 through 6.5; 2.6; 2.7; 2.7; 2.7; +7 more · source: NVD
Affected product
SQ
Squid
Squid-cache
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-50269
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-50269
Broken Link
http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch
Broken Link
http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch
Third Party Advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3
lists.debian.org
https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/
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