__________________________________________________________________
Squid Proxy Cache Security Update Advisory SQUID-2009:2
__________________________________________________________________
Advisory ID: SQUID-2009:2
Date: August 04, 2009
Summary: Multiple Remote Denial of service issues
in header processing.
Affected versions: Squid 3.0 -> 3.0.STABLE17,
Squid 3.1 -> 3.1.0.12
Fixed in version: Squid 3.0.STABLE18, 3.1.0.13
__________________________________________________________________
http://www.squid-cache.org/Advisories/SQUID-2009_2.txt
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2009-2621
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2009-2622
__________________________________________________________________
Problem Description:
Due to incorrect buffer limits and related bound checks Squid
is vulnerable to a denial of service attack when processing
specially crafted requests or responses.
Due to incorrect data validation Squid is vulnerable to a denial
of service attack when processing specially crafted responses.
__________________________________________________________________
Severity:
These problems allow any trusted client or external server to
perform a denial of service attack on the Squid service.
__________________________________________________________________
Updated Packages:
Theses bugs are fixed by Squid versions 3.0.STABLE18 and 3.1.0.13
In addition, patches addressing these problems can be found In
our patch archives. These need to be applied in sequence:
Squid 3.0:
http://www.squid-cache.org/Versions/v3/3.0/changesets/b9070.patch
http://www.squid-cache.org/Versions/v3/3.0/changesets/b9074.patch
http://www.squid-cache.org/Versions/v3/3.0/changesets/b9075.patch
http://www.squid-cache.org/Versions/v3/3.0/changesets/b9081.patch
http://www.squid-cache.org/Versions/v3/3.0/changesets/b9082.patch
Squid 3.1:
http://www.squid-cache.org/Versions/v3/3.1/changesets/b9654.patch
http://www.squid-cache.org/Versions/v3/3.1/changesets/b9661.patch
http://www.squid-cache.org/Versions/v3/3.1/changesets/b9668.patch
http://www.squid-cache.org/Versions/v3/3.1/changesets/b9669.patch
If you are using a prepackaged version of Squid then please refer
to the package vendor for availability information on updated
packages.
__________________________________________________________________
Determining if your version is vulnerable:
All unpatched Squid-3.0 versions up to and including 3.0.STABLE17
are vulnerable.
All unpatched Squid-3.1 versions up to and including 3.1.0.12 are
vulnerable.
Squid-2.x releases are not vulnerable.
__________________________________________________________________
Workarounds:
None currently known.
__________________________________________________________________
Contact details for the Squid project:
For installation / upgrade support on binary packaged versions
of Squid: Your first point of contact should be your binary
package vendor.
If your install and build Squid from the original Squid sources
then the squid-users@xxxxxxxxxxxxxxx mailing list is your primary
support point. For subscription details see
<http://www.squid-cache.org/Support/mailing-lists.html>.
For reporting of non-security bugs in the latest STABLE release
the squid bugzilla database should be used
<http://www.squid-cache.org/bugs/>.
For reporting of security sensitive bugs send an email to the
squid-bugs@xxxxxxxxxxxxxxx mailing list. It's a closed list
(though anyone can post) and security related bug reports are
treated in confidence until the impact has been established.
__________________________________________________________________
Credits:
The request vulnerabilities were discovered by Alex Montoanelli
of www.unetvale.net
Some response vulnerabilities were discovered by Rob Middleton
of Centenary Institute.
Some response vulnerabilities were discovered by Tuomo Untinen,
Ossi Herrala and Jukka Taimisto from the CROSS project at
Codenomicon Ltd.
__________________________________________________________________
Revision history:
2009-07-27 14:08 GMT Initial version
2009-08-02 08:15 GMT Add CVE references
2009-08-03 10:27 GMT Revision for additional flaws patched
2009-08-04 23:44 GMT Updated fix releases
__________________________________________________________________
END
