Executive Summary

Summary
Titlelibxml2: Denial of Service
Informations
NameGLSA-201009-07First vendor Publication2010-09-21
VendorGentooLast vendor Modification2010-09-21
Severity (Vendor) NormalRevisionN/A

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Cvss Base Score4.3Attack RangeNetwork
Cvss Impact Score2.9Attack ComplexityMedium
Cvss Expoit Score8.6AuthentificationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

Multiple Denial of Services vulnerabilities were found in libxml2.

Background

libxml2 is a library to manipulate XML files.

Description

The following vulnerabilities were reported after a test with the Codenomicon XML fuzzing framework:

* Two use-after-free vulnerabilities are possible when parsing a XML file with Notation or Enumeration attribute types (CVE-2009-2416).

* A stack consumption vulnerability can be triggered via a large depth of element declarations in a DTD, related to a function recursion (CVE-2009-2414).

Impact

A remote attacker could entice a user or automated system to open a specially crafted XML document with an application using libxml2
resulting in a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All libxml2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/libxml2-2.7.3-r2"

NOTE: This is a legacy GLSA. Updates for all affected architectures are available since August 30, 2009. It is likely that your system is already no longer affected by this issue.

References

[ 1 ] CVE-2009-2414 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2414
[ 2 ] CVE-2009-2416 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2416

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-201009-07.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-201009-07.xml

CWE : Common Weakness Enumeration

idName
CWE-399Resource Management Errors
CWE-119Failure to Constrain Operations within the Bounds of a Memory Buffer

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:8639
 
Oval ID: oval:org.mitre.oval:def:8639
Title: VMware libxml2 stack consumption vulnerability
Description: Stack consumption vulnerability in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allows context-dependent attackers to cause a denial of service (application crash) via a large depth of element declarations in a DTD, related to a function recursion, as demonstrated by the Codenomicon XML fuzzing framework.
Family: unix Class: vulnerability
Reference(s): CVE-2009-2414
 Version: 2
Platform(s): VMWare ESX Server 3
VMWare ESX Server 3.5
VMWare ESX Server 4
 Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:10129
 
Oval ID: oval:org.mitre.oval:def:10129
Title: Stack consumption vulnerability in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allows context-dependent attackers to cause a denial of service (application crash) via a large depth of element declarations in a DTD, related to a function recursion, as demonstrated by the Codenomicon XML fuzzing framework.
Description: Stack consumption vulnerability in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allows context-dependent attackers to cause a denial of service (application crash) via a large depth of element declarations in a DTD, related to a function recursion, as demonstrated by the Codenomicon XML fuzzing framework.
Family: unix Class: vulnerability
Reference(s): CVE-2009-2414
 Version: 5
Platform(s): Red Hat Enterprise Linux 3
CentOS Linux 3
Red Hat Enterprise Linux 4
CentOS Linux 4
Oracle Linux 4
Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
 Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:9262
 
Oval ID: oval:org.mitre.oval:def:9262
Title: Multiple use-after-free vulnerabilities in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allow context-dependent attackers to cause a denial of service (application crash) via crafted (1) Notation or (2) Enumeration attribute types in an XML file, as demonstrated by the Codenomicon XML fuzzing framework.
Description: Multiple use-after-free vulnerabilities in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allow context-dependent attackers to cause a denial of service (application crash) via crafted (1) Notation or (2) Enumeration attribute types in an XML file, as demonstrated by the Codenomicon XML fuzzing framework.
Family: unix Class: vulnerability
Reference(s): CVE-2009-2416
 Version: 5
Platform(s): Red Hat Enterprise Linux 3
CentOS Linux 3
Red Hat Enterprise Linux 4
CentOS Linux 4
Oracle Linux 4
Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
 Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:7783
 
Oval ID: oval:org.mitre.oval:def:7783
Title: VMware libxml2 use-after-free vulnerability
Description: Multiple use-after-free vulnerabilities in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allow context-dependent attackers to cause a denial of service (application crash) via crafted (1) Notation or (2) Enumeration attribute types in an XML file, as demonstrated by the Codenomicon XML fuzzing framework.
Family: unix Class: vulnerability
Reference(s): CVE-2009-2416
 Version: 2
Platform(s): VMWare ESX Server 3
VMWare ESX Server 3.5
VMWare ESX Server 4
 Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application1
Application5

Open Source Vulnerability Database (OSVDB)

idDescription
56990libxml2 DTD Element Declaration Handling Stack Consumption DoS
56985libxml2 XML File Multiple Attribute Type Handling DoS