Microsoft Windows contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the user or cause a denial of service condition.? Updates are available.
Microsoft Windows contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the user or cause a denial of service (DoS) condition.
This vulnerability exists due to insufficient validation of parameters within AVI files.? An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious media file.? If the user views the file, the attacker could execute code with the privileges of the user.
Microsoft has confirmed this vulnerability in a security bulletin and released software updates that correct it.
Systems running the following versions of Microsoft Windows are vulnerable:
Windows 2000 SP4 and prior
Windows XP SP3 and prior
Windows XP Professional x64 Edition SP2 and prior
Windows Server 2003 SP2 and prior
Windows Server 2003 x64 Edition SP2 and prior
Windows Server 2003 for Itanium-based Systems SP2 and prior
Windows Vista SP2 and prior
Windows Vista x64 Edition SP2 and prior
Windows Server 2008 for 32-bit Systems SP2 and prior
Windows Server 2008 for x64-based Systems SP2 and prior
Windows Server 2008 for Itanium-based Systems SP2 and prior
Attackers cannot directly exploit this vulnerability, and instead rely upon user interaction in order to accomplish an exploit.? An attacker must convince a user to view a malicious media file, likely provided as an e-mail attachment or posted on a public website.? Attackers may use social engineering techniques in an attempt to convince users to view provided media files.
If an exploit is successful, the attacker could execute arbitrary code with the privileges of the user.? End host systems on which users hold elevated privileges are most at risk, as an exploit could result in a complete system compromise.? Attackers may leverage the vulnerability to execute code and install malicious software or set up user accounts that could allow later system access.
The update available from Microsoft corrects this vulnerability by properly validating AVI data.
Microsoft has released a security bulletin at the following link: MS09-038
On Windows 2000 systems, an unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with the privileges of the user.? If that user holds Administrator privileges, the attacker could completely compromise the target system.? On other affected platforms, the attacker could only cause an application failure resulting in a?DoS condition.
This vulnerability exists due to insufficient validation of parameters within AVI files.? The AVIFile API fails to properly process malformed data.? The processing of a malicious file could trigger an integer overflow.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious AVI movie file.? The movie could be part of a website or attached to an e-mail message.? When viewed, the message could trigger an integer overflow that the attacker could leverage to execute arbitrary code with the privileges of the user.
Administrators are advised to apply the applicable software updates.
Administrators may consider disabling access to avifil32.dll to prevent the rendering of AVI content.
Users should verify that unsolicited links are safe to follow.
Users are advised to run applications with the least necessary privileges.
Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.
Microsoft customers can obtain updates directly by using the links in the security bulletin. These updates are also distributed by Windows automatic update features and available on the Windows Update website. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
Datacenter Edition Base | Datacenter Edition, 64-bit Base | Itanium-Based Systems Edition Base | Enterprise Edition Base | Enterprise Edition, 64-bit Base | Essential Business Server Standard Base | Essential Business Server Premium Base | Essential Business Server Premium, 64-bit Base | Standard Edition Base | Standard Edition, 64-bit Base | Web Server Base | Web Server, 64-bit Base
Home Basic Base, SP1 | Home Premium Base, SP1 | Business Base, SP1 | Enterprise Base, SP1 | Ultimate Base, SP1 | Home Basic x64 Edition Base, SP1 | Home Premium x64 Edition Base, SP1 | Business x64 Edition Base, SP1 | Enterprise x64 Edition Base, SP1 | Ultimate x64 Edition Base, SP1
Home Edition Base, SP1, SP2, SP3 | Professional Edition Base, SP1, SP2, SP3 | Professional x64 (AMD/EM64T) Base, SP2
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the
Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service.
This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.