CVE-2009-3720

CVE Details

Release Date:	2009-11-03
Impact:	Moderate	What is this?

Description

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. 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.

See more information about CVE-2009-3720 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 metrics

Base Score:	5.0
Vector String:	AV:N/AC:L/Au:N/C:N/I:N/A:P
Version:	2.0
Attack Vector:	Network
Attack Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial

Errata information

Platform	Errata	Release Date
Oracle Enterprise Linux version 3 (4Suite)	ELSA-2009-1572	2009-11-10
Oracle Enterprise Linux version 3 (expat)	ELSA-2009-1625	2009-12-07
Oracle Enterprise Linux version 4 (4Suite)	ELSA-2009-1572	2009-11-10
Oracle Enterprise Linux version 4 (PyXML)	ELSA-2010-0002	2010-01-04
Oracle Enterprise Linux version 4 (expat)	ELSA-2009-1625	2009-12-07
Oracle Enterprise Linux version 4 (python)	ELSA-2011-0491	2011-05-05
Oracle Linux version 5 (PyXML)	ELSA-2010-0002	2010-01-04
Oracle Linux version 5 (expat)	ELSA-2009-1625	2009-12-07
Oracle Linux version 5 (python)	ELSA-2011-0492	2011-05-05