|Description||Squid before 3.5.6 does not properly handle CONNECT method peer responses when configured with cache_peer, which allows remote attackers to bypass intended restrictions and gain access to a backend proxy via a CONNECT request.|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)|
|NVD severity||medium (attack range: remote)|
Vulnerable and fixed packages
The table below lists information on source packages.
|squid (PTS)||buster, sid||4.2-2||fixed|
|squid3 (PTS)||jessie (security), jessie||3.4.8-6+deb8u5||fixed|
|stretch (security), stretch||3.5.23-5+deb9u1||fixed|
The information below is based on the following data on fixed versions.
[wheezy] - squid <no-dsa> (Fix is hard to backport and default configuration is not affected)
[squeeze] - squid <no-dsa> (Fix is hard to backport and default configuration is not affected)
In squeeze's squid3 the code is structured differently but the bug still appears to be present.
For squid 2.x all versions are affected, cf. comment by upstream in