(Red Hat Issues Fix) Libxml2 Heap Overflow in xmlParseAttValueComplex() Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1020857 |
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SecurityTracker URL: http://securitytracker.com/id/1020857
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CVE Reference:
CVE-2008-3529
(Links to External Site)
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Date: Sep 12 2008
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Impact:
Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 2.7.0
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Description:
A vulnerability was reported in Libxml2. A remote user can cause arbitrary code to be executed on the target system.
A remote user can create a specially crafted XML entity name that, when processed by the target application using libxml2, will trigger a heap overflow and execute arbitrary code on the target system. The code will run with the privileges of the target application.
The vulnerability resides in the xmlParseAttValueComplex() function in 'parser.c'.
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Impact:
A remote user can execute arbitrary code on the target system.
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Solution:
Red Hat has released a fix.
The Red Hat advisory is available at:
https://rhn.redhat.com/errata/RHSA-2008-0886.html
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Vendor URL: xmlsoft.org/ (Links to External Site)
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Cause:
Boundary error
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Underlying OS:
Linux (Red Hat Enterprise)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Thu, 11 Sep 2008 09:57:30 -0400
Subject: [RHSA-2008:0886-01] Important: libxml2 security update
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: libxml2 security update
Advisory ID: RHSA-2008:0886-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2008-0886.html
Issue date: 2008-09-11
CVE Names: CVE-2003-1564 CVE-2008-3529
=====================================================================
1. Summary:
Updated libxml2 packages that fix various security issues are now available
for Red Hat Enterprise Linux 2.1.
This update has been rated as having important security impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386
3. Description:
The libxml2 packages provide a library that allows you to manipulate XML
files. It includes support to read, modify, and write XML and HTML files.
A heap-based buffer overflow flaw was found in the way libxml2 handled long
XML entity names. If an application linked against libxml2 processed
untrusted malformed XML content, it could cause the application to crash
or, possibly, execute arbitrary code. (CVE-2008-3529)
A denial of service flaw was found in the way libxml2 processed certain
content. If an application linked against libxml2 processed malformed XML
content, it could cause the application to use an excessive amount of CPU
time and memory, and stop responding. (CVE-2003-1564)
All users of libxml2 are advised to upgrade to these updated packages,
which contain backported patches to resolve these issues.
4. Solution:
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188
5. Bugs fixed (http://bugzilla.redhat.com/):
461015 - CVE-2008-3529 libxml2: long entity name heap buffer overflow
461107 - CVE-2003-1564 libxml2: billion laughs DoS attack
6. Package List:
Red Hat Enterprise Linux AS (Advanced Server) version 2.1 :
Source:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/libxml2-2.4.19-11.ent.src.rpm
i386:
libxml2-2.4.19-11.ent.i386.rpm
libxml2-devel-2.4.19-11.ent.i386.rpm
libxml2-python-2.4.19-11.ent.i386.rpm
ia64:
libxml2-2.4.19-11.ent.ia64.rpm
libxml2-devel-2.4.19-11.ent.ia64.rpm
libxml2-python-2.4.19-11.ent.ia64.rpm
Red Hat Linux Advanced Workstation 2.1:
Source:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/libxml2-2.4.19-11.ent.src.rpm
ia64:
libxml2-2.4.19-11.ent.ia64.rpm
libxml2-devel-2.4.19-11.ent.ia64.rpm
libxml2-python-2.4.19-11.ent.ia64.rpm
Red Hat Enterprise Linux ES version 2.1:
Source:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/libxml2-2.4.19-11.ent.src.rpm
i386:
libxml2-2.4.19-11.ent.i386.rpm
libxml2-devel-2.4.19-11.ent.i386.rpm
libxml2-python-2.4.19-11.ent.i386.rpm
Red Hat Enterprise Linux WS version 2.1:
Source:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/libxml2-2.4.19-11.ent.src.rpm
i386:
libxml2-2.4.19-11.ent.i386.rpm
libxml2-devel-2.4.19-11.ent.i386.rpm
libxml2-python-2.4.19-11.ent.i386.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package
7. References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-1564
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3529
http://www.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2008 Red Hat, Inc.
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