-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 National Cyber Alert System Technical Cyber Security Alert TA06-045A Microsoft Windows, Windows Media Player, and Internet Explorer Vulnerabilities Original release date: February 14, 2006 Last revised: -- Source: US-CERT Systems Affected * Microsoft Windows * Microsoft Windows Media Player * Microsoft Internet Explorer For more complete information, refer to the Microsoft Security Bulletin Summary for February 2006. Overview Microsoft has released updates that address critical vulnerabilities in Windows, Windows Media Player, and Internet Explorer. Exploitation of these vulnerabilities could allow a remote, unauthenticated attacker to execute arbitrary code or cause a denial of service on a vulnerable system. I. Description Microsoft Security Bulletins for February 2006 address vulnerabilities in Microsoft Windows, Windows Media Player, and Internet Explorer. Further information is available in the following US-CERT Vulnerability Notes: VU#312956 - Microsoft WMF memory corruption vulnerability Microsoft applications fail to properly handle WMF (Windows Meta File) images, potentially allowing a remote attacker to execute arbitrary code on a vulnerable system. (CVE-2006-0020) VU#291396 - Microsoft Windows Media Player vulnerable to buffer overflow in bitmap processing routine Microsoft Windows Media Player contains a buffer overflow vulnerability that may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. (CVE-2006-0006) VU#692060 - Microsoft Windows Media Player plug-in buffer overflow The Microsoft Windows Media Player plug-in for browsers other than Internet Explorer contains a buffer overflow, which may allow a remote attacker to execute arbitrary code. (CVE-2006-005) VU#839284 - Microsoft Windows TCP/IP fails to properly validate IGMP packets Microsoft Windows implementations of the TCP/IP protocol fail to properly validate IGMP (Internet Group Management Protocol) packets, leading to a denial-of-service condition. (CVE-2006-0021) II. Impact Exploitation of these vulnerabilities may allow a remote, unauthenticated attacker to execute arbitrary code with the privileges of the user. If the user is logged on with administrative privileges, the attacker could take complete control of an affected system. An attacker may also be able to cause a denial of service. III. Solution Apply Updates Microsoft has provided the updates for these vulnerabilities in the Security Bulletins and on the Microsoft Update site. Workarounds Please see the following US-CERT Vulnerability Notes for workarounds. Appendix A. References * Microsoft Security Bulletin Summary for February 2006 - * US-CERT Vulnerability Note VU#312956 - * US-CERT Vulnerability Note VU#291396 - * US-CERT Vulnerability Note VU#692060 - * US-CERT Vulnerability Note VU#839284 - * CVE-2006-0020 - * CVE-2006-0006 - * CVE-2006-0005 - * CVE-2006-0021 - * Microsoft Update - ____________________________________________________________________ The most recent version of this document can be found at: ____________________________________________________________________ Feedback can be directed to US-CERT Technical Staff. Please send email to with "TA06-045A Feedback VU#692060" in the subject. ____________________________________________________________________ For instructions on subscribing to or unsubscribing from this mailing list, visit . ____________________________________________________________________ Produced 2006 by US-CERT, a government organization. Terms of use: ____________________________________________________________________ Revision History Feb 14, 2006: Initial release -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iQEVAwUBQ/JA5n0pj593lg50AQLmuwf/U9ZRe+fwUG2v9e3/jiTKxqj5bEQ8OZWo P/9Lg5JSjNn2kJdKTFSSbrLeYcJ6GcA74ROn/zv7wevKZuZ0i7xQCKih08AtyPAk fY92F9OaOfUy9qUv2AfEUeri0qZ5+MqnOpI9A1HDT63kYwSKk0Dm6sERfHCjBiU9 jrkHmPKurM1VLUczb1ZbFgHQxFrpZVJW6ws+Kb48V7CYN55ID195mrwAKk3U49qi c+6TBwhb00Oh3BNpi5pc8PhyYZSbZxc534FKfjvRIhd2wfZTcA36y4UyKHLWNGXx W2VxbNA9LgKjVHq1gj1DH+NTlzqhQNmdbd8w5HC5J51qfGnZEfgZ+Q== =IkwB -----END PGP SIGNATURE-----