-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Technical Cyber Security Alert TA05-221A Microsoft Windows and Internet Explorer Vulnerabilities Original release date: August 09, 2005 Last revised: -- Source: US-CERT Systems Affected * Microsoft Windows * Microsoft Internet Explorer For more complete information, refer to the Microsoft Security Bulletin Summary for August, 2005. Overview Microsoft has released updates that address critical vulnerabilities in Windows and Internet Explorer. Exploitation of these vulnerabilities could allow a remote, unauthenticated attacker to execute arbitrary code or cause a denial of service on an affected system. I. Description Microsoft Security Bulletins for August, 2005 address vulnerabilities in Windows and Internet Explorer. Further information is available in the following Vulnerability Notes: VU#965206 - Microsoft Internet Explorer JPEG rendering library vulnerable to buffer overflow Microsoft Internet Explorer contains a flaw related to JPEG image rendering that may allow an attacker to remotely execute arbitrary code. (CAN-2005-1988) VU#959049 - Several COM objects cause memory corruption in Internet Explorer Microsoft Internet Explorer allows instantiation of non-ActiveX COM objects, which may allow an attacker to execute arbitrary code or crash Internet Explorer. (CAN-2005-1990) VU#998653 - Microsoft Plug and Play contains a buffer overflow vulnerability Microsoft Plug and Play contains a flaw in the handling of message buffers that may result in a local or remote denial-of-service condition and arbitrary code execution. (CAN-2005-1983) VU#490628 - Microsoft Remote Desktop Protocol service contains an unspecified vulnerability An input validation error in the Microsoft Remote Desktop Protocol (RDP) service may allow a remote attacker to cause a denial-of-service condition. (CAN-2005-1218) VU#220821 - Microsoft Print Spooler service contains a buffer overflow A buffer overflow in the Microsoft Print Spooler service may allow a remote attacker to execute arbitrary code on a vulnerable system. (CAN-2005-1984) II. Impact Exploitation of these vulnerabilities may allow a remote, unauthenticated attacker to execute arbitrary code with SYSTEM privileges or 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 individual Vulnerability Notes for workarounds. Appendix A. References * Microsoft Security Bulletin Summary for August, 2005 - * US-CERT Vulnerability Note VU#965206 - * US-CERT Vulnerability Note VU#959049 - * US-CERT Vulnerability Note VU#998653 - * US-CERT Vulnerability Note VU#490628 - * US-CERT Vulnerability Note VU#220821 - * CAN-2005-1988 - * CAN-2005-1990 - * CAN-2005-1983 - * CAN-2005-1218 - * CAN-2005-1984 - * Microsoft Update - * Microsoft Update Overview - _________________________________________________________________ Feedback can be directed to the US-CERT Technical Staff. Please send mail to cert@cert.org with the subject: "TA05-221A Feedback VU#959049" _________________________________________________________________ This document is available at _________________________________________________________________ Produced 2005 by US-CERT, a government organization. _________________________________________________________________ Terms of use: _________________________________________________________________ Revision History August 09, 2005: Initial Release -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iQEVAwUBQvk4zxhoSezw4YfQAQKraAf/b5uL0gaNUl6kICwCTHqpvqik4vW/k6h6 6wmx8K/r1cxQibBE4+3JZ0TxTLaa3nJIDoX7Q/MQxvlOowDd2OMh73Lf/Vm3+myj V+IMm1bq7EjgJ5o3AbailAzHYwuju+SGNODS8X94BtLkVVlTE6kT4It9FU6oV0Wf ktkJkuMUxc6tvvi/QutC8Xi5mZZS9FgpAZxJthZhEZ94Qq1ftMrjQeFnEQnzEGLs kT0CA7pNb8PReO19s9gfdiLiEPhHhBx0A9HFC3+1K7/FurYFblXmVaPi9iMdeIdF JSGbequI70AjZnl8PcLj22wngqPKez25SvBZemg4HBEdSYA3mBWK1g== =kIj8 -----END PGP SIGNATURE-----