When validating an origin server or peer certificate, Squid 5 before version 5.2 may incorrectly classify certain certificates as trusted. This problem allows a remote server to obtain security trust when the trust is not valid. This indication of trust may be passed along to clients allowing access to unsafe or hijacked services. This problem is guaranteed to occur when multiple CA have signed the TLS server certificate. It may also occur in cases of broken server certificate chains.
When validating an origin server or peer certificate, Squid 5 before version 5.2 may incorrectly classify certain certificates as trusted. This problem allows a remote server to obtain security trust when the trust is not valid. This indication of trust may be passed along to clients allowing access to unsafe or hijacked services. This problem is guaranteed to occur when multiple CA have signed the TLS server certificate. It may also occur in cases of broken server certificate chains.
https://github.com/squid-cache/squid/security/advisories/GHSA-47m4-g3mv-9q5r http://www.squid-cache.org/Versions/v5/changesets/squid-5-533b4359f16cf9ed15a6d709a57a4b06e4222cfe.patch
Vulmon