Bug 530862 (CVE-2009-3700, CVE-2009-3826)

Summary:	squidGuard: buffer overflow in sgLog.c (CVE-2009-3700) and two URL filter bypass issues (CVE-2009-3826)
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gwync
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
URL:	http://secunia.com/advisories/37107/
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-11-04 14:00:02 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Jan Lieskovsky 2009-10-25 18:17:09 UTC

squidGuard upstream has released patches fixing (quoting
from upstream advisories):

a, This patch fixes one buffer overflow problem in sgLog.c when overlong URLs
are requested. SquidGuard will then go into emergency mode were no blocking
occurs. This is not required in this situation.

URL:  http://www.squidguard.org/Downloads/Patches/1.4/Readme.Patch-20091015
----

b, This patch fixes two bypass problems with URLs which length is close to the 
limit defined by MAX_BUF (default: 4096) in squidGuard and MAX_URL (default:
4096 in squid 2.x and 8192 in squid 3.x) in squid. For this kind of URLs the 
proxy request exceeds MAX_BUF causing squidGuard to complain about not being 
able to parse the squid request.

URL:  http://www.squidguard.org/Downloads/Patches/1.4/Readme.Patch-20091019
----

References:
-----------
http://secunia.com/advisories/37107/
http://www.securityfocus.com/bid/36800/info
http://www.nntpnews.net/f3468/ports-139844-maintainer-update-www-squidguard-fix-security-vulnerabilities-11997445/

Upstream patches - squidGuard 1.4:
----------------------------------
http://www.squidguard.org/Downloads/P.../squidGuard-1.4-patch-20091015.tar.gz
http://www.squidguard.org/Downloads/P.../squidGuard-1.4-patch-20091019.tar.gz

Upstream advisories:
--------------------
http://www.squidguard.org/Downloads/Patches/1.4/Readme.Patch-20091015
http://www.squidguard.org/Downloads/Patches/1.4/Readme.Patch-20091019

Comment 1 Jan Lieskovsky 2009-10-25 18:18:05 UTC

These issues affects the versions of the squidGuard package, as shipped
with Fedora release of 10 and 11.

Please fix.

Comment 2 Fedora Update System 2009-10-26 14:12:10 UTC

squidGuard-1.4-8.fc10 has been submitted as an update for Fedora 10.
http://admin.fedoraproject.org/updates/squidGuard-1.4-8.fc10

Comment 3 Fedora Update System 2009-10-26 14:12:21 UTC

squidGuard-1.4-8.fc11 has been submitted as an update for Fedora 11.
http://admin.fedoraproject.org/updates/squidGuard-1.4-8.fc11

Comment 4 Tomas Hoger 2009-10-28 15:03:48 UTC

CVE-2009-3700:
Buffer overflow in sgLog.c in squidGuard 1.3 and 1.4 allows remote
attackers to cause a denial of service (application hang or loss of
blocking functionality) via a long URL with many / (slash) characters,
related to "emergency mode."

CVE-2009-3826:
Multiple buffer overflows in squidGuard 1.4 allow remote attackers to
bypass intended URL blocking via a long URL, related to (1) the
relationship between a certain buffer size in squidGuard and a certain
buffer size in Squid and (2) a redirect URL that contains information
about the originally requested URL.

Comment 5 Fedora Update System 2009-11-04 12:21:07 UTC

squidGuard-1.4-8.fc11 has been pushed to the Fedora 11 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2009-11-04 12:40:21 UTC

squidGuard-1.4-8.fc10 has been pushed to the Fedora 10 stable repository.  If problems still persist, please make note of it in this bug report.