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[USN-2995-1] Squid vulnerabilities

Posted on 09 June 2016
Ubuntu Security

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Ubuntu Security Notice USN-2995-1
June 09, 2016

squid3 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS
- Ubuntu 15.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in Squid.

Software Description:
- squid3: Web proxy cache server

Details:

Yuriy M. Kaminskiy discovered that the Squid pinger utility incorrectly
handled certain ICMPv6 packets. A remote attacker could use this issue to=

cause Squid to crash, resulting in a denial of service, or possibly cause=

Squid to leak information into log files. (CVE-2016-3947)

Yuriy M. Kaminskiy discovered that the Squid cachemgr.cgi tool incorrectl=
y
handled certain crafted data. A remote attacker could use this issue to
cause Squid to crash, resulting in a denial of service, or possibly execu=
te
arbitrary code. (CVE-2016-4051)

It was discovered that Squid incorrectly handled certain Edge Side Includ=
es
(ESI) responses. A remote attacker could possibly use this issue to cause=

Squid to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2016-4052, CVE-2016-4053, CVE-2016-4054)

Jianjun Chen discovered that Squid did not correctly ignore the Host head=
er
when absolute-URI is provided. A remote attacker could possibly use this
issue to conduct cache-poisoning attacks. This issue only affected Ubuntu=

14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-4553)

Jianjun Chen discovered that Squid incorrectly handled certain HTTP Host
headers. A remote attacker could possibly use this issue to conduct
cache-poisoning attacks. (CVE-2016-4554)

It was discovered that Squid incorrectly handled certain Edge Side Includ=
es
(ESI) responses. A remote attacker could possibly use this issue to cause=

Squid to crash, resulting in a denial of service. (CVE-2016-4555,
CVE-2016-4556)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
squid-cgi 3.5.12-1ubuntu7.2
squid3 3.5.12-1ubuntu7.2

Ubuntu 15.10:
squid-cgi 3.3.8-1ubuntu16.3
squid3 3.3.8-1ubuntu16.3

Ubuntu 14.04 LTS:
squid-cgi 3.3.8-1ubuntu6.8
squid3 3.3.8-1ubuntu6.8

Ubuntu 12.04 LTS:
squid-cgi 3.1.19-1ubuntu3.12.04.7
squid3 3.1.19-1ubuntu3.12.04.7

In general, a standard system update will make all the necessary changes.=


References:
http://www.ubuntu.com/usn/usn-2995-1
CVE-2016-3947, CVE-2016-4051, CVE-2016-4052, CVE-2016-4053,
CVE-2016-4054, CVE-2016-4553, CVE-2016-4554, CVE-2016-4555,
CVE-2016-4556

Package Information:
https://launchpad.net/ubuntu/+source/squid3/3.5.12-1ubuntu7.2
https://launchpad.net/ubuntu/+source/squid3/3.3.8-1ubuntu16.3
https://launchpad.net/ubuntu/+source/squid3/3.3.8-1ubuntu6.8
https://launchpad.net/ubuntu/+source/squid3/3.1.19-1ubuntu3.12.04.7



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