-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
National Cyber Alert System
Technical Cyber Security Alert TA05-312A
Microsoft Windows Image Processing Vulnerabilities
Original release date: November 08, 2005
Last revised: --
Source: US-CERT
Systems Affected
* Microsoft Windows 2000
* Microsoft Windows XP
* Microsoft Windows Server 2003
For more complete information, refer to Microsoft Security Bulletin
MS05-053.
Overview
Microsoft has released updates that address critical vulnerabilities
in Windows graphics rendering services. A remote, unauthenticated
attacker exploiting these vulnerabilities could execute arbitrary code
or cause a denial of service on an affected system.
I. Description
The Microsoft Security Bulletin for November 2005 addresses multiple
buffer overflows in Windows image processing routines. Viewing a
specially crafted image from an application that uses a vulnerable
routine may trigger these vulnerabilities. If this application can
access images from remote sources, such as web sites or email, then
remote exploitation is possible.
Further information is available in the following US-CERT
Vulnerability Notes:
VU#300549 - Microsoft Windows Graphics Rendering Engine buffer
overflow vulnerability
Microsoft Windows Graphics Rendering Engine contains a buffer overflow
that may allow a remote attacker to execute arbitrary code on a
vulnerable system.
(CVE-2005-2123)
VU#433341 - Microsoft Windows vulnerable to buffer overflow via
specially crafted "WMF" file
Microsoft Windows may be vulnerable to remote code execution via a
buffer overflow in the Windows Metafile image format handling.
(CVE-2005-2124)
VU#134756 - Microsoft Windows buffer overflow in Enhanced Metafile
rendering API
Microsoft Windows Enhanced Metafile Format image rendering routines
contain a buffer overflow flaw that may allow an attacker to cause a
denial-of-service condition.
(CVE-2005-0803)
III. Solution
Apply Updates
Microsoft has provided the updates to correct these vulnerabilities in
Microsoft Security Bulletin MS05-053. These updates are also available
on the Microsoft Update site.
II. Impact
A remote, unauthenticated attacker exploiting these vulnerabilities
could execute arbitrary code with the privileges of the user. If the
user is logged on with administrative privileges, the attacker could
take control of an affected system. An attacker may also be able to
cause a denial of service.
Appendix A. References
* Microsoft Security Bulletin MS05-053 -
<http://www.microsoft.com/technet/security/bulletin/MS05-053.mspx>
* Microsoft Security Bulletin Summary for November 2005 -
<http://www.microsoft.com/technet/security/bulletin/ms05-nov.mspx>
* US-CERT Vulnerability Note VU#300549 -
<http://www.kb.cert.org/vuls/id/300549>
* US-CERT Vulnerability Note VU#433341 -
<http://www.kb.cert.org/vuls/id/433341>
* US-CERT Vulnerability Note VU#134756 -
<http://www.kb.cert.org/vuls/id/134756>
* Microsoft Update - <https://update.microsoft.com/microsoftupdate>
_________________________________________________________________
The most recent version of this document can be found at:
<http://www.us-cert.gov/cas/techalerts/TA05-312A.html>
_________________________________________________________________
Feedback can be directed to US-CERT. Please send email to:
<cert@xxxxxxxx> with "TA05-312A Feedback VU#300549" in the subject.
_________________________________________________________________
Revision History
Nov 08, 2005: Initial release
_________________________________________________________________
Produced 2005 by US-CERT, a government organization.
Terms of use
<http://www.us-cert.gov/legal.html>
_________________________________________________________________
For instructions on subscribing to or unsubscribing from this
mailing list, visit <http://www.us-cert.gov/cas/>.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (GNU/Linux)
iQEVAwUBQ3E5BH0pj593lg50AQISLAf+NMAgk3Up6wWphjOIQ89miwTHvpXHGmIH
/mxHQ3PoN82NPkr8NmnLHhNAHqi8+ZI15lrympvr6xvm8C8FTxPU+dCa9CxS3c4l
FLbTDbACHeD/OYwgvbE70Gx5ZUG95MMXgCRMHGiwIHaSHRspUQRMjRN5JubPjsyL
S737+Yr19hMw6JQOWhM+Pn0MyAs6qm+4gfnIxO2Z1PsmpnushpqW505U6B6ZkF7W
zCU0zecdwtZCMhWTu+3L/MqAjzt7VCsd2iC+0HS7WLvAcWoFcEvlL6Ai/E/eJLDm
HQnO34E8231CcKRT4VACvs1QPFV1pvw1pihOAXveiBFoHpCIdPLc6g==
=faQS
-----END PGP SIGNATURE-----
