National Cyber-Alert System
Vulnerability Summary for CVE-2009-3720
Original release date:11/03/2009
Last revised:12/31/2009
Source:
US-CERT/NIST
Overview
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
CVSS Severity (version 2.0):
Impact Subscore:
2.9
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown
References to Advisories, Solutions, and Tools
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External Source: FEDORA
Name: FEDORA-2009-12753
External Source: FEDORA
Name: FEDORA-2009-12737
External Source: FEDORA
Name: FEDORA-2009-12690
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=531697
External Source: CONFIRM
Name: https://bugs.gentoo.org/show_bug.cgi?id=280615
External Source: SECTRACK
Name: 1023160
External Source: MLIST
Name: [oss-security] 20091028 Re: CVE Request -- expat [was: Re: Regarding expat bug 1990430]
External Source: MLIST
Name: [oss-security] 20091026 Re: CVE Request -- expat [was: Re: Regarding expat bug 1990430]
External Source: MLIST
Name: [oss-security] 20091023 Re: CVE Request -- expat [was: Re: Regarding expat bug 1990430]
External Source: MLIST
Name: [oss-security] 20091022 Re: Re: Regarding expat bug 1990430
External Source: MLIST
Name: [oss-security] 20091022 Re: Regarding expat bug 1990430
External Source: MLIST
Name: [oss-security] 20091022 Regarding expat bug 1990430
External Source: MLIST
Name: [oss-security] 20090906 Re: Re: expat bug 1990430
External Source: MLIST
Name: [oss-security] 20090827 Re: Re: expat bug 1990430
External Source: MLIST
Name: [oss-security] 20090826 Re: Re: expat bug 1990430
External Source: MLIST
Name: [oss-security] 20090826 Re: expat bug 1990430
External Source: MLIST
Name: [oss-security] 20090821 expat bug 1990430
External Source: MANDRIVA
Name: MDVSA-2009:220
External Source: MANDRIVA
Name: MDVSA-2009:219
External Source: MANDRIVA
Name: MDVSA-2009:218
External Source: MANDRIVA
Name: MDVSA-2009:217
External Source: MANDRIVA
Name: MDVSA-2009:216
External Source: MANDRIVA
Name: MDVSA-2009:215
External Source: MANDRIVA
Name: MDVSA-2009:212
External Source: MANDRIVA
Name: MDVSA-2009:211
External Source: CONFIRM
Name: http://svn.python.org/view?view=rev&revision=74429
External Source: SUNALERT
Name: 273630
External Source: MISC
Name: http://sourceforge.net/tracker/index.php?func=detail&aid=1990430&group_id=10127&atid=110127
External Source: SECUNIA
Name: 37925
External Source: SECUNIA
Name: 37537
External Source: SECUNIA
Name: 37324
External Source: MLIST
Name: [expat-bugs] 20090117 [ expat-Bugs-1990430 ] Parser crash with specially formatted UTF-8 sequences
External Source: SUSE
Name: SUSE-SR:2009:018
External Source: CONFIRM
Name: http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmltok_impl.c?view=log
External Source: CONFIRM
Name: http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmltok_impl.c?r1=1.13&r2=1.15&view=patch