Squid remote denial-of-service vulnerability

Overview

The Squid Proxy server contains a vulnerability that may allow an attacker to create a denial-of-service condition that affects the Squid server and systems that rely on it.

Description

Squid Proxy Cache is a caching proxy that supports the HTTP, HTTPS, and FTP protocols. Squid can also be deployed as a reverse proxy.

From Squid Proxy Cache Security Update Advisory SQUID-2007:2
Due to incorrect bounds checking Squid is vulnerable to a denial of service check during some cache update reply processing.
This incorrect bounds checking occurs within the httpHeaderUpdate() function when processing cache update replies.

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Impact

An attacker who can access the Squid proxy may be able to cause the proxy server to crash. If the Squid proxy is deployed as a reverse proxy, the web servers relying on the proxy may also be affected.

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Solution

Update
The Squid team has released patches 11780 and 11211 to address this issue. Administrators who obtain Squid from their operating system vendor should see the systems affected portion of this document for a partial list of affected vendors.

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Restrict access

Restricting access to the Squid proxy via access control lists or firewall rules may prevent this vulnerability from being exploited by remote attackers…

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Vendor Information

232881

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IPCop __ Affected

Notified: December 10, 2007 Updated: December 11, 2007

Status

Affected

Vendor Statement

In order to address this issue the IPCop team released version 1.4.18 on the 2nd of December. All users of IPCop should upgrade to version 1.4.18.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See http://ipcop.cvs.sourceforge.net/ipcop/ipcop/lfs/squid?view=log&pathrev=IPCOP_v1_4_0 for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23232881 Feedback>).

Red Hat, Inc. __ Affected

Notified: December 10, 2007 Updated: December 11, 2007

Status

Affected

Vendor Statement

This issue affects the Squid package as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and 5. The Red Hat Security Response Team has rated this issue as having moderate security impact. We are currently working on producing errata packages, when complete these will be available along with our advisory at the URL below.

<http://rhn.redhat.com/cve/CVE-2007-6239.html&gt;

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

SUSE Linux __ Affected

Notified: December 10, 2007 Updated: January 18, 2008

Status

Affected

Vendor Statement

SUSE is affected by this problem, and we have released updated squid packages to fix it.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See <http://www.novell.com/linux/security/advisories/suse_security_announce_62.html&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23232881 Feedback>).

Squid __ Affected

Updated: December 10, 2007

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See <http://www.squid-cache.org/Advisories/SQUID-2007_2.txt&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23232881 Feedback>).

Apple Computer, Inc. Not Affected

Notified: December 10, 2007 Updated: December 11, 2007

Status

Not Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Microsoft Corporation Not Affected

Notified: December 10, 2007 Updated: December 11, 2007

Status

Not Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

NetBSD Not Affected

Notified: December 10, 2007 Updated: December 11, 2007

Status

Not Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Openwall GNU/*/Linux __ Not Affected

Notified: December 10, 2007 Updated: December 11, 2007

Status

Not Affected

Vendor Statement

Openwall GNU/*/Linux is not affected. We do not currently package Squid.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Slackware Linux Inc. Not Affected

Notified: December 10, 2007 Updated: December 10, 2007

Status

Not Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Conectiva Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Cray Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Debian GNU/Linux Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

EMC Corporation Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Engarde Secure Linux Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

F5 Networks, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Fedora Project Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

FreeBSD, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Fujitsu Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Gentoo Linux Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Hewlett-Packard Company Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Hitachi Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM Corporation Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM Corporation (zseries) Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM eServer Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Ingrian Networks, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Juniper Networks, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Mandriva, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

MontaVista Software, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

NEC Corporation Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Nokia Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Novell, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

OpenBSD Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

QNX, Software Systems, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Silicon Graphics, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

SmoothWall Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Sony Corporation Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Sun Microsystems, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

The SCO Group Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Trustix Secure Linux Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Turbolinux Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Ubuntu Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Unisys Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Wind River Systems, Inc. Unknown

Notified: December 10, 2007 Updated: December 10, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

View all 43 vendors __View less vendors __

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.squid-cache.org/Advisories/SQUID-2007_2.txt&gt;
• <http://wiki.squid-cache.org/SquidFaq/ReverseProxy&gt;
• <http://wiki.squid-cache.org/SquidFaq/SquidAcl#head-c87419712cac704d01cecc7da11cd02f489b6986&gt;
• <http://secunia.com/advisories/27910/&gt;

Acknowledgements

The Squid proxy team credits the Wikimedia Foundation for discovering this vulnerability. Adrian Chadd and Henrik Nordstrom are credited for authoring patches that address the issue.

This document was written by Ryan Giobbi.

Other Information

CVE IDs:	CVE-2007-6239
Severity Metric:	7.51 Date Public: