Microsoft Windows contains a vulnerability that could allow a local attacker to execute arbitrary code with elevated privileges. Updates are available.
Microsoft Windows contains a vulnerability that could allow a local attacker to gain elevated privileges on the targeted system.
The vulnerability is due to improper validation of requests sent from user-mode applications to the Windows kernel. A local attacker could exploit the vulnerability by running a malicious program. If successful, the attacker could execute arbitrary code on the system with elevated privileges.
Microsoft confirmed this vulnerability in a security bulletin and released software updates.
The following Microsoft systems are affected:
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 Itanium-based Edition 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 Itanium-based Edition SP2 and prior
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for Itanium-based Systems
To exploit the vulnerability, an attacker must log in locally to an affected system and run a malicious program. The access requirements to exploit the vulnerability greatly reduce the chances of exploitation.
Microsoft has released a security bulletin at the following link: MS10-098
A local attacker could exploit this vulnerability to execute arbitrary code on the system with the elevated privileges of the Windows kernel, possibly resulting in a complete system compromise.
The vulnerability is due to improper validation of requests sent from user-mode applications to the Windows win32k.sys kernel driver.
A local attacker could exploit this vulnerability by running a program that is designed to send malicious requests to the Windows kernel. When processed, the requests could cause the kernel to improperly allocate memory during a memory copy operation. The attacker could use the memory error to execute arbitrary code with the privileges of the Windows kernel.
Administrators are advised to apply the available software updates.
Administrators are advised to allow only trusted users to access local systems.
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 Windows Update website. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
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