Microsoft Windows contains a vulnerability that could allow a local attacker to gain elevated privileges on a targeted system. Updates are available.
Microsoft Windows contains a vulnerability that could allow a local attacker to gain elevated privileges on a targeted system.
The vulnerability exists because the affected software improperly handles objects in memory. A local attacker could exploit this vulnerability by running a crafted application. Successful exploitation could allow the attacker to execute arbitrary code in kernel mode, which could result in a complete system compromise.
Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
The following Microsoft products are affected:
Windows XP SP3 and prior
Windows Server 2003 SP2 and prior
Windows Vista SP2 and prior
Windows Server 2008 for 32-bit Systems SP2 and prior
Windows 7 for 32-bit Systems SP1 and prior
To exploit this vulnerability, the attacker must be able to log in locally to a targeted system. As a result, trusted users with limited privileges may use this type of vulnerability as part of an insider attack.
Microsoft has corrected this vulnerability by correcting the way Windows kernel-mode drivers handle objects in memory.
Microsoft has released a security bulletin at the following link: MS12-075
A local attacker could exploit this issue to gain elevated privileges on a targeted system. Successful exploitation could allow an attacker to execute arbitrary code in kernel mode, which could result in a complete system compromise.
The vulnerability exists because the affected software improperly handles objects in memory, resulting in a use-after-free memory error.
A local attacker could exploit this vulnerability by running a specially crafted application. When the software processes the application, a use-after-free memory error condition may occur that the attacker could use to gain elevated privileges and execute arbitrary code on the system with these privileges, resulting in a complete compromise of the system.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to access local systems.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.
Administrators are advised to monitor critical systems.
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 Microsoft Update service. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
LEGAL DISCLAIMER 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.