[RHSA-2016:1140-01] Moderate: squid34 security update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Moderate: squid34 security update

Advisory ID: RHSA-2016:1140-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2016:1140

Issue date: 2016-05-31

CVE Names: CVE-2016-4051 CVE-2016-4052 CVE-2016-4053

CVE-2016-4054 CVE-2016-4553 CVE-2016-4554

CVE-2016-4555 CVE-2016-4556

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1. Summary:

 

An update for squid34 is now available for Red Hat Enterprise Linux 6.

 

Red Hat Product Security has rated this update as having a security impact

of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which

gives a detailed severity rating, is available for each vulnerability from

the CVE link(s) in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

 

3. Description:

 

The "squid34" packages provide version 3.4 of Squid, a high-performance

proxy caching server for web clients, supporting FTP, Gopher, and HTTP data

objects. Note that apart from "squid34", this version of Red Hat Enterprise

Linux also includes the "squid" packages which provide Squid version 3.1.

 

Security Fix(es):

 

* A buffer overflow flaw was found in the way the Squid cachemgr.cgi

utility processed remotely relayed Squid input. When the CGI interface

utility is used, a remote attacker could possibly use this flaw to execute

arbitrary code. (CVE-2016-4051)

 

* Buffer overflow and input validation flaws were found in the way Squid

processed ESI responses. If Squid was used as a reverse proxy, or for

TLS/HTTPS interception, a remote attacker able to control ESI components on

an HTTP server could use these flaws to crash Squid, disclose parts of the

stack memory, or possibly execute arbitrary code as the user running Squid.

(CVE-2016-4052, CVE-2016-4053, CVE-2016-4054)

 

* An input validation flaw was found in the way Squid handled intercepted

HTTP Request messages. An attacker could use this flaw to bypass the

protection against issues related to CVE-2009-0801, and perform cache

poisoning attacks on Squid. (CVE-2016-4553)

 

* An input validation flaw was found in Squid's mime_get_header_field()

function, which is used to search for headers within HTTP requests. An

attacker could send an HTTP request from the client side with specially

crafted header Host header that bypasses same-origin security protections,

causing Squid operating as interception or reverse-proxy to contact the

wrong origin server. It could also be used for cache poisoning for client

not following RFC 7230. (CVE-2016-4554)

 

* A NULL pointer dereference flaw was found in the way Squid processes ESI

responses. If Squid was used as a reverse proxy or for TLS/HTTPS

interception, a malicious server could use this flaw to crash the Squid

worker process. (CVE-2016-4555)

 

* An incorrect reference counting flaw was found in the way Squid processes

ESI responses. If Squid is configured as reverse-proxy, for TLS/HTTPS

interception, an attacker controlling a server accessed by Squid, could

crash the squid worker, causing a Denial of Service attack. (CVE-2016-4556)

 

4. Solution:

 

For details on how to apply this update, which includes the changes

described in this advisory, refer to:

 

https://access.redhat.com/articles/11258

 

After installing this update, the squid service will be restarted

automatically.

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1329126 - CVE-2016-4051 squid: buffer overflow in cachemgr.cgi

1329136 - CVE-2016-4052 CVE-2016-4053 CVE-2016-4054 squid: multiple issues in ESI processing

1334233 - CVE-2016-4553 squid: Cache poisoning issue in HTTP Request handling

1334241 - CVE-2016-4554 squid: Header Smuggling issue in HTTP Request processing

1334246 - CVE-2016-4555 squid: SegFault from ESIInclude::Start

1334786 - CVE-2016-4556 squid: SIGSEGV in ESIContext response handling

 

6. Package List:

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

squid34-3.4.14-9.el6_8.3.src.rpm

 

i386:

squid34-3.4.14-9.el6_8.3.i686.rpm

squid34-debuginfo-3.4.14-9.el6_8.3.i686.rpm

 

ppc64:

squid34-3.4.14-9.el6_8.3.ppc64.rpm

squid34-debuginfo-3.4.14-9.el6_8.3.ppc64.rpm

 

s390x:

squid34-3.4.14-9.el6_8.3.s390x.rpm

squid34-debuginfo-3.4.14-9.el6_8.3.s390x.rpm

 

x86_64:

squid34-3.4.14-9.el6_8.3.x86_64.rpm

squid34-debuginfo-3.4.14-9.el6_8.3.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

squid34-3.4.14-9.el6_8.3.src.rpm

 

i386:

squid34-3.4.14-9.el6_8.3.i686.rpm

squid34-debuginfo-3.4.14-9.el6_8.3.i686.rpm

 

x86_64:

squid34-3.4.14-9.el6_8.3.x86_64.rpm

squid34-debuginfo-3.4.14-9.el6_8.3.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/

 

7. References:

 

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

https://access.redhat.com/security/cve/CVE-2016-4553

https://access.redhat.com/security/cve/CVE-2016-4554

https://access.redhat.com/security/cve/CVE-2016-4555

https://access.redhat.com/security/cve/CVE-2016-4556

https://access.redhat.com/security/updates/classification/#moderate

http://www.squid-cache.org/Advisories/SQUID-2016_5.txt

http://www.squid-cache.org/Advisories/SQUID-2016_6.txt

http://www.squid-cache.org/Advisories/SQUID-2016_7.txt

http://www.squid-cache.org/Advisories/SQUID-2016_8.txt

http://www.squid-cache.org/Advisories/SQUID-2016_9.txt

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2016 Red Hat, Inc.

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