CVE-2009-3720
MEDIUMEPSS 98th pctlDescription
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.
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
Very high risk: more likely to be exploited than 98% of all known CVEs.
References
- http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmltok_impl.c?r1=1.13&r2=1.15&view=patch
- http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmltok_impl.c?view=log
- http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051228.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051247.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051367.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051405.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051442.html
- http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html
- http://lists.vmware.com/pipermail/security-announce/2010/000082.html
- http://mail.python.org/pipermail/expat-bugs/2009-January/002781.html
- http://marc.info/?l=bugtraq&m=130168502603566&w=2
- http://secunia.com/advisories/37324
- http://secunia.com/advisories/37537
- http://secunia.com/advisories/37925
- http://secunia.com/advisories/38050
- http://secunia.com/advisories/38231
- http://secunia.com/advisories/38794
- http://secunia.com/advisories/38832
- http://secunia.com/advisories/38834
- http://secunia.com/advisories/39478
- http://secunia.com/advisories/41701
- http://secunia.com/advisories/42326
- http://secunia.com/advisories/42338
- http://secunia.com/advisories/43300
- http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.486026
- http://sourceforge.net/tracker/index.php?func=detail&aid=1990430&group_id=10127&atid=110127
- http://sunsolve.sun.com/search/document.do?assetkey=1-66-273630-1
- http://svn.python.org/view?view=rev&revision=74429
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:211
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:212
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:215
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:216
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:217
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:218
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:219
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:220
- http://www.openwall.com/lists/oss-security/2009/08/21/2
- http://www.openwall.com/lists/oss-security/2009/08/26/3
- http://www.openwall.com/lists/oss-security/2009/08/26/4
- http://www.openwall.com/lists/oss-security/2009/08/27/6
- http://www.openwall.com/lists/oss-security/2009/09/06/1
- http://www.openwall.com/lists/oss-security/2009/10/22/5
- http://www.openwall.com/lists/oss-security/2009/10/22/9
- http://www.openwall.com/lists/oss-security/2009/10/23/2
- http://www.openwall.com/lists/oss-security/2009/10/23/6
- http://www.openwall.com/lists/oss-security/2009/10/26/3
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.