-----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 - * Microsoft Security Bulletin Summary for November 2005 - * US-CERT Vulnerability Note VU#300549 - * US-CERT Vulnerability Note VU#433341 - * US-CERT Vulnerability Note VU#134756 - * Microsoft Update - _________________________________________________________________ The most recent version of this document can be found at: _________________________________________________________________ Feedback can be directed to US-CERT. Please send email to: 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 _________________________________________________________________ For instructions on subscribing to or unsubscribing from this mailing list, visit . -----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-----