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Debian Security Advisory DSA 3625-1 (squid3 - security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.8

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

6 years ago

Modified

Modified

8 months ago

Summary

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.

Affected Software

Affected Software

squid3 on Debian Linux

Detection Method

Detection Method

This check tests the installed software version using the apt package manager.

Solution

Solution

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.