Microsoft Windows contains a vulnerability that could allow a local attacker to execute arbitrary code with elevated privileges on a targeted system. Updates are available.
A vulnerability in Microsoft Windows could allow a local attacker to execute arbitrary code with elevated privileges.
The vulnerability is due to improper handling of objects in memory by the Service Control Manager (SCM) component of the affected software while retrieving corrupted service descriptions from the Windows registry. A local attacker could exploit the vulnerability by convincing an authenticated user to execute a crafted application designed to pass malicious input to the affected software. A successful exploit could allow the attacker to execute arbitrary code with elevated privileges, which could allow the attacker to completely compromise the system.
Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
The following Microsoft products are affected:
Windows 7 for 32-bit and x64-based Systems SP1
Windows Server 2008 R2 for x64-based and Itanium-based Systems SP1
To exploit this vulnerability, an attacker requires authenticated and local access to the targeted system, which may require the attacker to access trusted, internal networks. These access requirements could limit the likelihood of a successful exploit. In addition, an attacker may attempt to convince an authenticated user to run a crafted application by using social engineering techniques.
Microsoft has resolved the vulnerability by correcting how the affected software handles objects in memory when presented with corrupted service descriptions.
Microsoft has released a security bulletin at the following link: MS13-077
A local attacker could exploit the vulnerability to execute arbitrary code in the security context of another user. If the user has elevated privileges, the attacker could completely compromise the targeted system.
The vulnerability is due to improper handling of objects in memory by the SCM component of the affected software while retrieving corrupted service descriptions from the Windows registry. As a result, a double free condition may occur that could lead to memory corruption.
A local attacker could exploit the vulnerability by convincing an authenticated user to execute a crafted application designed to pass malicious input to the affected software. A successful exploit could allow the attacker to execute arbitrary code with elevated privileges, which could allow the attacker to completely compromise the system.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to access local systems.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected 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 Microsoft Update service. 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.
for 32-bit systems SP1 | for x64-based systems SP1
Windows Server 2008 R2
x64-Based Systems Edition SP1 | Itanium-Based Systems Edition SP1
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