CVE-2023-50269 - CVE House
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Status published High CVE-2023-50269

SQUID-2023:10 Denial of Service in HTTP Request parsing

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

squid-cache

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Affected Software

squid
Vulnerable Versions:
>= 2.6, <= 2.7.STABLE9, >= 3.1, <= 5.9, >= 6.0.1, < 6.6

Timeline

Official Publish: December 14th, 2023
Last Modified: May 21st, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Weaknesses (CWE)

CWE-674

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.