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Category:   Application (Generic)  >   4Suite Vendors:   4Suite
(Red Hat Issues Fix for 4Suite) expat UTF-8 Sequence Parsing Flaw Lets Users Deny Service
SecurityTracker Alert ID:  1023161
SecurityTracker URL:  http://securitytracker.com/id/1023161
CVE Reference:   CVE-2009-3720   (Links to External Site)
Date:  Nov 11 2009
Impact:   Denial of service via local system, Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in expat. A user can cause denial of service conditions. 4Suite is affected.

A remote or local user can supply XML content with a specially crafted UTF-8 sequence that, when processed by expat, will cause expat to crash.

The specific impact depends on the application using expat.

The vulnerability resides in 'xmltok_impl.c'.

Peter Valchev reported this vulnerability.

Impact:   A user can cause expat to crash.
Solution:   Red Hat has issued a fix for 4Suite, which is affected by this vulnerability.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2009-1572.html

Cause:   Boundary error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  3, 4

Message History:   This archive entry is a follow-up to the message listed below.
Nov 11 2009 expat UTF-8 Sequence Parsing Flaw Lets Users Deny Service



 Source Message Contents

Subject:  [RHSA-2009:1572-02] Moderate: 4Suite security update

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: 4Suite security update
Advisory ID:       RHSA-2009:1572-02
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-1572.html
Issue date:        2009-11-10
CVE Names:         CVE-2009-3720 
=====================================================================

1. Summary:

An updated 4Suite package that fixes one security issue is now available
for Red Hat Enterprise Linux 3 and 4.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Description:

The 4Suite package contains XML-related tools and libraries for Python,
including 4DOM, 4XSLT, 4XPath, 4RDF, and 4XPointer.

A buffer over-read flaw was found in the way 4Suite's XML parser handles
malformed UTF-8 sequences when processing XML files. A specially-crafted
XML file could cause applications using the 4Suite library to crash while
parsing the file. (CVE-2009-3720)

Note: In Red Hat Enterprise Linux 3, this flaw only affects a non-default
configuration of the 4Suite package: configurations where the beta version
of the cDomlette module is enabled.

All 4Suite users should upgrade to this updated package, which contains a
backported patch to correct this issue. After installing the updated
package, applications using the 4Suite XML-related tools and libraries must
be restarted for the update to take effect.

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/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

531697 - CVE-2009-3720 expat: buffer over-read and crash on XML with malformed UTF-8 sequences

6. Package List:

Red Hat Enterprise Linux AS version 3:

Source:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/4Suite-0.11.1-15.src.rpm

i386:
4Suite-0.11.1-15.i386.rpm
4Suite-debuginfo-0.11.1-15.i386.rpm

ia64:
4Suite-0.11.1-15.ia64.rpm
4Suite-debuginfo-0.11.1-15.ia64.rpm

ppc:
4Suite-0.11.1-15.ppc.rpm
4Suite-debuginfo-0.11.1-15.ppc.rpm

s390:
4Suite-0.11.1-15.s390.rpm
4Suite-debuginfo-0.11.1-15.s390.rpm

s390x:
4Suite-0.11.1-15.s390x.rpm
4Suite-debuginfo-0.11.1-15.s390x.rpm

x86_64:
4Suite-0.11.1-15.x86_64.rpm
4Suite-debuginfo-0.11.1-15.x86_64.rpm

Red Hat Desktop version 3:

Source:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/4Suite-0.11.1-15.src.rpm

i386:
4Suite-0.11.1-15.i386.rpm
4Suite-debuginfo-0.11.1-15.i386.rpm

x86_64:
4Suite-0.11.1-15.x86_64.rpm
4Suite-debuginfo-0.11.1-15.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

Source:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/4Suite-0.11.1-15.src.rpm

i386:
4Suite-0.11.1-15.i386.rpm
4Suite-debuginfo-0.11.1-15.i386.rpm

ia64:
4Suite-0.11.1-15.ia64.rpm
4Suite-debuginfo-0.11.1-15.ia64.rpm

x86_64:
4Suite-0.11.1-15.x86_64.rpm
4Suite-debuginfo-0.11.1-15.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

Source:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/4Suite-0.11.1-15.src.rpm

i386:
4Suite-0.11.1-15.i386.rpm
4Suite-debuginfo-0.11.1-15.i386.rpm

ia64:
4Suite-0.11.1-15.ia64.rpm
4Suite-debuginfo-0.11.1-15.ia64.rpm

x86_64:
4Suite-0.11.1-15.x86_64.rpm
4Suite-debuginfo-0.11.1-15.x86_64.rpm

Red Hat Enterprise Linux AS version 4:

Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/4Suite-1.0-3.el4_8.1.src.rpm

i386:
4Suite-1.0-3.el4_8.1.i386.rpm
4Suite-debuginfo-1.0-3.el4_8.1.i386.rpm

ia64:
4Suite-1.0-3.el4_8.1.ia64.rpm
4Suite-debuginfo-1.0-3.el4_8.1.ia64.rpm

ppc:
4Suite-1.0-3.el4_8.1.ppc.rpm
4Suite-debuginfo-1.0-3.el4_8.1.ppc.rpm

s390:
4Suite-1.0-3.el4_8.1.s390.rpm
4Suite-debuginfo-1.0-3.el4_8.1.s390.rpm

s390x:
4Suite-1.0-3.el4_8.1.s390x.rpm
4Suite-debuginfo-1.0-3.el4_8.1.s390x.rpm

x86_64:
4Suite-1.0-3.el4_8.1.x86_64.rpm
4Suite-debuginfo-1.0-3.el4_8.1.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/4Suite-1.0-3.el4_8.1.src.rpm

i386:
4Suite-1.0-3.el4_8.1.i386.rpm
4Suite-debuginfo-1.0-3.el4_8.1.i386.rpm

x86_64:
4Suite-1.0-3.el4_8.1.x86_64.rpm
4Suite-debuginfo-1.0-3.el4_8.1.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/4Suite-1.0-3.el4_8.1.src.rpm

i386:
4Suite-1.0-3.el4_8.1.i386.rpm
4Suite-debuginfo-1.0-3.el4_8.1.i386.rpm

ia64:
4Suite-1.0-3.el4_8.1.ia64.rpm
4Suite-debuginfo-1.0-3.el4_8.1.ia64.rpm

x86_64:
4Suite-1.0-3.el4_8.1.x86_64.rpm
4Suite-debuginfo-1.0-3.el4_8.1.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/4Suite-1.0-3.el4_8.1.src.rpm

i386:
4Suite-1.0-3.el4_8.1.i386.rpm
4Suite-debuginfo-1.0-3.el4_8.1.i386.rpm

ia64:
4Suite-1.0-3.el4_8.1.ia64.rpm
4Suite-debuginfo-1.0-3.el4_8.1.ia64.rpm

x86_64:
4Suite-1.0-3.el4_8.1.x86_64.rpm
4Suite-debuginfo-1.0-3.el4_8.1.x86_64.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-2009-3720
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2009 Red Hat, Inc.
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