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AUSCERT External Security Bulletin Redistribution
ESB-2014.2383
sol15905: Expat vulnerabilities CVE-2009-3560 and CVE-2009-3720
12 December 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2009-3720 CVE-2009-3560 CVE-2009-2625
Reference: ASB-2010.0228
ASB-2010.0030
ASB-2009.1109
ESB-2009.1144
ESB-2009.1141
ESB-2009.1132.4
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/15000/900/sol15905.html
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sol15905: Expat vulnerabilities CVE-2009-3560 and CVE-2009-3720
Security Advisory
Original Publication Date: 12/11/2014
Description
CVE-2009-3560
The big2_toUtf8 function in lib/xmltok.c in libexpat in Expat 2.0.1, as
used in the XML-Twig module for Perl, allows context-dependent attackers
to cause a denial of service (application crash) via an XML document with
malformed UTF-8 sequences that trigger a buffer over-read, related to
the doProlog function in lib/xmlparse.c, a different vulnerability than
CVE-2009-2625 and CVE-2009-3720.
CVE-2009-3720
The updatePosition function in lib/xmltok_impl.c in libexpat in Expat
2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows
context-dependent attackers to cause a denial of service (application
crash) via an XML document with crafted UTF-8 sequences that trigger a
buffer over-read, a different vulnerability than CVE-2009-2625.
Impact
An attacker may be able to cause a disruption of service.
Status
F5 Product Development has assigned ID 242353 (BIG-IP) and ID 491424
(WebSafe) to this vulnerability, and has evaluated the currently supported
releases for potential vulnerability.
To determine if your release is known to be vulnerable, the components
or features that are affected by the vulnerability, and for information
about releases or hotfixes that address the vulnerability, refer to the
following table:
Product Versions known to be vulnerable Versions known to be not vulnerable Vulnerable component or feature
BIG-IP LTM 10.1.0 11.0.0 - 11.6.0 XML Parsing
10.2.0 - 10.2.4
BIG-IP APM 10.1.0 11.0.0 - 11.6.0 XML Parsing
10.2.0 - 10.2.4
BIG-IP ASM 10.1.0 11.0.0 - 11.6.0 XML Parsing
10.2.0 - 10.2.4
BIG-IP Edge 10.1.0 11.0.0 - 11.3.0 XML Parsing
Gateway 10.2.0 - 10.2.4
BIG-IP GTM 10.1.0 11.0.0 - 11.6.0 XML Parsing
10.2.0 - 10.2.4
BIG-IP Link 10.1.0 11.0.0 - 11.6.0 XML Parsing
Controller 10.2.0 - 10.2.4
BIG-IP PSM 10.1.0 11.0.0 - 11.4.1 XML Parsing
10.2.0 - 10.2.4
BIG-IP 10.1.0 11.0.0 - 11.3.0 XML Parsing
WebAccelerator 10.2.0 - 10.2.4
BIG-IP WOM 10.1.0 11.0.0 - 11.3.0 XML Parsing
10.2.0 - 10.2.4
Recommended Action
If the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to
the listed version. If the table does not list any version in the column,
then no upgrade candidate currently exists.
Supplemental Information
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents.
SOL4602: Overview of the F5 security vulnerability response policy
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
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