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Vulnerability record · CVE-2022-41318 · published 25 December 2022

CVE-2022-41318: Squid-cache squid integer overflow vulnerability

Squid Cache · Squid

A buffer over-read was discovered in libntlmauth in Squid 2.5 through 5.6. Due to incorrect integer-overflow protection, the SSPI and SMB authentication helpers are vulnerable to reading unintended memory locations. In some configurations, cleartext credentials from these locations are sent to a client. This is fixed in 5.7.

8.6 CVSS 3.1 High EPSS 2.8% · top 13.8% CWE-190 · Integer overflow
8.6CVSS 3.1 base score
2.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

A buffer over-read was discovered in libntlmauth in Squid 2.5 through 5.6. Due to incorrect integer-overflow protection, the SSPI and SMB authentication helpers are vulnerable to reading unintended memory locations. In some configurations, cleartext credentials from these locations are sent to a client. This is fixed in 5.7.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2022_2.patch PatchThird Party Advisory
http://www.squid-cache.org/Versions/v5/changesets/SQUID-2022_2.patch PatchThird Party Advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-394c-rr7q-6g78 PatchThird Party Advisory
https://www.openwall.com/lists/oss-security/2022/09/23/2 Mailing ListPatchThird Party Advisory
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2022_2.patch PatchThird Party Advisory
http://www.squid-cache.org/Versions/v5/changesets/SQUID-2022_2.patch PatchThird Party Advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-394c-rr7q-6g78 PatchThird Party Advisory
https://www.openwall.com/lists/oss-security/2022/09/23/2 Mailing ListPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-41318), CISA KEV, FIRST EPSS (scores of 2026-10-04). This page is refreshed as NVD updates the record.