An issue was discovered in Squid 5.0.6 through 5.1.x before 5.2. When validating an origin server or peer certificate, Squid may incorrectly classify certain certificates as trusted. This problem allows a remote server to obtain security trust well improperly. This indication of trust may be passed along to clients, allowing access to unsafe or hijacked services.
Weakness
The product does not validate, or incorrectly validates, a certificate.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Squid | Squid-cache | 5.0.6 (including) | 5.2 (excluding) |
| Squid | Ubuntu | trusty | * |
| Squid | Ubuntu | upstream | * |
| Squid3 | Ubuntu | trusty | * |
Potential Mitigations
Related Attack Patterns
References
- http://www.openwall.com/lists/oss-security/2021/12/23/2
- http://www.squid-cache.org/Versions/v6/changesets/squid-6-43d6b5c81b88ec2256b430c69a872a1e4f324e4a.patch
- https://github.com/squid-cache/squid/security/advisories/GHSA-47m4-g3mv-9q5r
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CWQ2WKDWTSO47S3F6XJJ6HGG2ULWEAE4/
- http://www.openwall.com/lists/oss-security/2021/12/23/2
- http://www.squid-cache.org/Versions/v6/changesets/squid-6-43d6b5c81b88ec2256b430c69a872a1e4f324e4a.patch
- https://github.com/squid-cache/squid/security/advisories/GHSA-47m4-g3mv-9q5r
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CWQ2WKDWTSO47S3F6XJJ6HGG2ULWEAE4/