Microsoft Windows Print Spooler Service contains a vulnerability that could allow a local attacker to execute arbitrary code on a targeted system. Updates are available.
A vulnerability in Microsoft Windows Print Spooler Service could allow a local attacker to execute arbitrary code.
The vulnerability is due to improper memory operations performed by the affected software when deleting printer connections. An attacker could exploit the vulnerability by deleting a printer connection. A successful exploit could allow the attacker to execute arbitrary code with SYSTEM privileges, resulting in a complete compromise of the targeted system.
Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
The following Microsoft products are affected:
Windows Vista SP2
Windows Vista x64 Edition SP2
Windows Server 2008 for 32-bit Systems SP2
Windows Server 2008 for x64-based Systems SP2
Windows Server 2008 for Itanium-based Systems SP2
Windows 7 for 32-bit and x64-based Systems SP1
Windows Server 2008 R2 for x64-based Systems SP1
Windows Server 2008 R2 for Itanium-based Systems SP1
Windows 8 for 33-bit and 64-bit Systems
Windows Server 2012
To exploit the vulnerability, the attacker requires authenticated access to the targeted system. This access require may reduce the likelihood of a successful exploit.
Microsoft has resolved the vulnerability by correcting the way the Windows Print Spooler handles memory allocation when a printer connection is deleted.
Microsoft has released a security bulletin at the following link: MS13-050
A local attacker could exploit the vulnerability to execute arbitrary code with SYSTEM privileges, resulting in a complete compromise of the targeted system.
The vulnerability is due to improper memory operations performed by the affected software when deleting printer connections.
A local attacker could exploit the vulnerability by deleting a printer connection. When the printer connection is deleted, the Windows Print Spooler does not properly free allocated memory, resulting in a memory error that the attacker could use to execute arbitrary code. A successful exploit could allow the attacker to execute arbitrary code with SYSTEM 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 have network access.
Administrators are advised to consider disabling the Windows Print Spooler service if not required.
Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.
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.
Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.
Administrators are advised to use an unprivileged account when browsing the Internet.
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
Original Release Base
Windows Server 2008
Datacenter Edition SP2 | Datacenter Edition, 64-bit SP2 | Itanium-Based Systems Edition SP2 | Enterprise Edition SP2 | Enterprise Edition, 64-bit SP2 | Essential Business Server Standard SP2 | Essential Business Server Premium SP2 | Essential Business Server Premium, 64-bit SP2 | Standard Edition SP2 | Standard Edition, 64-bit SP2 | Web Server SP2 | Web Server, 64-bit SP2
Windows Server 2012
Original Release Base
Home Basic SP2 | Home Premium SP2 | Business SP2 | Enterprise SP2 | Ultimate SP2 | Home Basic x64 Edition SP2 | Home Premium x64 Edition SP2 | Business x64 Edition SP2 | Enterprise x64 Edition SP2 | Ultimate x64 Edition SP2
for 32-bit systems Base | for x64-based systems Base
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