Debian Security Advisory

DSA-3625-1 squid3 -- security update

Date Reported:
22 Jul 2016
Affected Packages:
squid3
Vulnerable:
Yes
Security database references:
In the Debian bugtracking system: Bug 823968.
In Mitre's CVE dictionary: CVE-2016-4051, CVE-2016-4052, CVE-2016-4053, CVE-2016-4054, CVE-2016-4553, CVE-2016-4554, CVE-2016-4555, CVE-2016-4556.
More information:

Several security issues have been discovered in the Squid caching proxy.

  • CVE-2016-4051:

    CESG and Yuriy M. Kaminskiy discovered that Squid cachemgr.cgi was vulnerable to a buffer overflow when processing remotely supplied inputs relayed through Squid.

  • CVE-2016-4052:

    CESG discovered that a buffer overflow made Squid vulnerable to a Denial of Service (DoS) attack when processing ESI responses.

  • CVE-2016-4053:

    CESG found that Squid was vulnerable to public information disclosure of the server stack layout when processing ESI responses.

  • CVE-2016-4054:

    CESG discovered that Squid was vulnerable to remote code execution when processing ESI responses.

  • CVE-2016-4554:

    Jianjun Chen found that Squid was vulnerable to a header smuggling attack that could lead to cache poisoning and to bypass of same-origin security policy in Squid and some client browsers.

  • CVE-2016-4555, CVE-2016-4556:

    "bfek-18" and "@vftable" found that Squid was vulnerable to a Denial of Service (DoS) attack when processing ESI responses, due to incorrect pointer handling and reference counting.

For the stable distribution (jessie), these problems have been fixed in version 3.4.8-6+deb8u3.

For the testing (stretch) and unstable (sid) distributions, these problems have been fixed in version 3.5.19-1.

We recommend that you upgrade your squid3 packages.