Arch Linux Security Advisory ASA-201604-14
=========================================
Severity: Critical
Date    : 2016-04-23
CVE-ID  : CVE-2016-4051 CVE-2016-4052 CVE-2016-4053 CVE-2016-4054
Package : squid
Type    : multiple issues
Remote  : Yes
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package squid before version 3.5.17-1 is vulnerable to multiple
issues including arbitrary code execution, information disclosure and
denial of service.

Resolution
=========
Upgrade to 3.5.17-1.

# pacman -Syu "squid>=3.5.17-1"

The problems have been fixed upstream in version 3.5.17.

Workaround
=========
None.

Description
==========
- CVE-2016-4051 (denial of service)

Due to incorrect buffer management Squid cachemgr.cgi tool is vulnerable
to a buffer overflow when processing remotely supplied inputs relayed to
it from Squid.

- CVE-2016-4052 (denial of service)

Due to buffer overflow issues Squid is vulnerable to a denial of service
attack when processing ESI responses.

- CVE-2016-4053 (information disclosure)

Due to incorrect input validation Squid is vulnerable to public
information disclosure of the server stack layout when processing
ESI responses.

- CVE-2016-4054 (arbitrary code execution)

Due to incorrect input validation and buffer overflow Squid is
vulnerable to remote code execution when processing ESI
responses.

Impact
=====
A remote attacker is able to execute arbitrary code, disclose sensitive
information or perform a denial of service attack via multiple
vulnerabilities.

References
=========
http://www.squid-cache.org/Advisories/SQUID-2016_5.txt
http://www.squid-cache.org/Advisories/SQUID-2016_6.txt
https://access.redhat.com/security/cve/CVE-2016-4051
https://access.redhat.com/security/cve/CVE-2016-4052
https://access.redhat.com/security/cve/CVE-2016-4053
https://access.redhat.com/security/cve/CVE-2016-4054