Microsoft Office contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on the system with the privileges of a targeted user.? Updates are available.
Microsoft Office contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.
The vulnerability is due to insecure library loading when opening Microsoft Office documents.? An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious Microsoft Office document.? If successful, the attacker could execute arbitrary code on the system with the privileges of a targeted user.
Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
Microsoft Office 2007 SP2 and prior and Office 2010 for 32-bit and 64-bit systems are affected.
An attacker could not exploit this vulnerability without user interaction.? The attacker must convince a user to view a malicious document, likely provided as an attachment to an e-mail message, or by convincing a user to follow a link to a file that is shared on a remote file share or website.? If opened, the document could trigger the execution of arbitrary code on the system with the privileges of the user.
Microsoft has released a security advisory that explains insecure library loading vulnerabilities at the following link: 2269637. The .dll preloading behavior has been documented in IntelliShield Alert 21215.? This vulnerability is similar to, but separate from, the vulnerability documented in IntelliShield Alert 21244.
Microsoft has released a security bulletin at the following link: MS10-087?
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with the privileges of the targeted user.? If that user holds elevated privileges, the attacker could gain complete control over the system.
The vulnerability exists due to insecure library loading when opening Microsoft Office documents.? When a file is opened, the file may direct the application to load a malicious library, possibly referenced from a remote WebDAV file store.? When loaded, the library could trigger the execution of arbitrary code on the system with the privileges of the user.
Administrators are advised to apply the appropriate software updates.
Users are advised not to open e-mail messages from suspicious or unrecognized sources.? If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.
Administrators are advised to monitor critical systems.
Microsoft has released a tool that could allow users to modify the insecure library loading behavior at the following link: 2264107?
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.
The security vulnerability applies to the following combinations of products.
2007 Base, SP1, SP2 | 2010 Base
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.