National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2009-3720 Detail

Description

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.

Source:  MITRE
Description Last Modified:  11/03/2009

Impact

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

Vendor Statements (disclaimer)

Official Statement from Red Hat (03/05/2010)

Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-3720 The Red Hat Security Response Team has rated this issue as having moderate security impact in Python, a future update may address this flaw. If a system has PyXML installed, Python will use PyXML for expat-related functions and is then not vulnerable to the issue.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://expat.cvs.sourceforge.net/viewvc/expat/expat/lib/xmltok_impl.c?r1=1.13&r2=1.15&view=patch Exploit
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://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
http://www.openwall.com/lists/oss-security/2009/10/28/3
http://www.redhat.com/support/errata/RHSA-2010-0002.html
http://www.redhat.com/support/errata/RHSA-2011-0896.html
http://www.securitytracker.com/id?1023160
http://www.ubuntu.com/usn/USN-890-1
http://www.ubuntu.com/usn/USN-890-6
http://www.vupen.com/english/advisories/2010/0528
http://www.vupen.com/english/advisories/2010/0896
http://www.vupen.com/english/advisories/2010/1107
http://www.vupen.com/english/advisories/2010/3035
http://www.vupen.com/english/advisories/2010/3053
http://www.vupen.com/english/advisories/2010/3061
http://www.vupen.com/english/advisories/2011/0359
https://bugs.gentoo.org/show_bug.cgi?id=280615
https://bugzilla.redhat.com/show_bug.cgi?id=531697
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11019
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12719
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7112
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00370.html
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00413.html
https://www.redhat.com/archives/fedora-package-announce/2009-December/msg01274.html

References to Check Content

Identifier:
oval:org.mitre.oval:def:11019
Check System:
http://oval.mitre.org/XMLSchema/oval-definitions-5
Hyperlink:
http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:11019
Identifier:
oval:org.mitre.oval:def:12719
Check System:
http://oval.mitre.org/XMLSchema/oval-definitions-5
Hyperlink:
http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:12719
Identifier:
oval:org.mitre.oval:def:7112
Check System:
http://oval.mitre.org/XMLSchema/oval-definitions-5
Hyperlink:
http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:7112

Technical Details

Vulnerability Type (View All)

Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2009-3720
NVD Published Date:
11/03/2009
NVD Last Modified:
09/18/2017