CVE-2023-50269

HIGH EPSS 99.0%
Published Dec 14, 20232y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Dec 14, 2023 2y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
99.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-674

Affected Products 13

VendorProductVersionRange
squid-cachesquid*≥3.1  –  ≤5.9
squid-cachesquid*≥6.0.1  –  ≤6.5
squid-cachesquid2.6any
squid-cachesquid2.7any
squid-cachesquid2.7any
squid-cachesquid2.7any
squid-cachesquid2.7any
squid-cachesquid2.7any
squid-cachesquid2.7any
squid-cachesquid2.7any
squid-cachesquid2.7any
squid-cachesquid2.7any
squid-cachesquid2.7any

References 7

  • squid-cache.org http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch
    Broken Link
  • squid-cache.org http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch
    Broken Link
  • github.com https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3
    Third Party Advisory
  • 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/
  • security.netapp.com https://security.netapp.com/advisory/ntap-20240119-0005/

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.