CVE-2022-41317

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-25 · updated 2026-06-17
Weakness: CWE-697

Description

An issue was discovered in Squid 4.9 through 4.17 and 5.0.6 through 5.6. Due to inconsistent handling of internal URIs, there can be Exposure of Sensitive Information about clients using the proxy via an HTTPS request to an internal cache manager URL. This is fixed in 5.7.

Affected products

Squid: from 4.9 through 4.17; from 5.0.6 before 5.7 — fixed in 5.7

How to fix

Upgrade to a fixed version: Squid 5.7. Check the vendor advisory for mitigations.

References

http://www.squid-cache.org/Versions/v4/changesets/SQUID-2022_1.patch
http://www.squid-cache.org/Versions/v5/changesets/SQUID-2022_1.patch
https://github.com/squid-cache/squid/security/advisories/GHSA-rcg9-7fqm-83mq
https://www.openwall.com/lists/oss-security/2022/09/23/1
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2022_1.patch
http://www.squid-cache.org/Versions/v5/changesets/SQUID-2022_1.patch
https://github.com/squid-cache/squid/security/advisories/GHSA-rcg9-7fqm-83mq
https://www.openwall.com/lists/oss-security/2022/09/23/1

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