(Red Hat Issues Fix) Squid Gopher Response Memory Corruption Error Lets Remote Users Deny Service
SecurityTracker Alert ID: 1026049|
SecurityTracker URL: http://securitytracker.com/id/1026049
(Links to External Site)
Date: Sep 14 2011
Denial of service via network|
Fix Available: Yes Vendor Confirmed: Yes Exploit Included: Yes |
Version(s): 3.0.x prior to 3.0.STABLE26, 3.1.x prior to 3.1.15, 3.2.x prior to 184.108.40.206|
A vulnerability was reported in Squid. A remote user can cause denial of service conditions.|
A remote Gopher server can return a specially crafted response longer than 4096 bytes to trigger a memory corruption error and cause the target Squid service to crash.
Ben Hawkes, Google Security Team, reported this vulnerability.
A remote user can cause Squid to restart.|
Red Hat has issued a fix.|
The Red Hat advisory is available at:
Vendor URL: www.squid-cache.org/Advisories/SQUID-2011_3.txt (Links to External Site)
|Underlying OS: Linux (Red Hat Enterprise)|
|Underlying OS Comments: 6|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [RHSA-2011:1293-01] Moderate: squid security update|
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Red Hat Security Advisory
Synopsis: Moderate: squid security update
Advisory ID: RHSA-2011:1293-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1293.html
Issue date: 2011-09-14
CVE Names: CVE-2011-3205
An updated squid package that fixes one security issue is now available for
Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link 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
Squid is a high-performance proxy caching server for web clients,
supporting FTP, Gopher, and HTTP data objects.
A buffer overflow flaw was found in the way Squid parsed replies from
remote Gopher servers. A remote user allowed to send Gopher requests to a
Squid proxy could possibly use this flaw to cause the squid child process
to crash or execute arbitrary code with the privileges of the squid user,
by making Squid perform a request to an attacker-controlled Gopher server.
Users of squid should upgrade to this updated package, which contains a
backported patch to correct this issue. After installing this update, the
squid service will be restarted automatically.
Before applying this update, make sure all previously-released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
5. Bugs fixed (http://bugzilla.redhat.com/):
734583 - CVE-2011-3205 squid: buffer overflow flaw in Squid's Gopher reply parser (SQUID-2011:3)
6. Package List:
Red Hat Enterprise Linux Server (v. 6):
Red Hat Enterprise Linux Workstation (v. 6):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2011 Red Hat, Inc.
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