September 10, 2013
Microsoft SharePoint is prone to a remote code-execution vulnerability. An attacker can exploit this issue to execute arbitrary code within the context of the guest account on the SharePoint server. Failed exploit attempts will result in a denial-of-service condition.
- Microsoft Excel Web App 2010 Service Pack 1
- Microsoft Excel Web App 2010 Service Pack 2
- Microsoft Exchange Server 2007 SP3
- Microsoft Exchange Server 2010 SP2
- Microsoft Exchange Server 2010 SP3
- Microsoft Exchange Server 2013 Cumulative Update 1
- Microsoft Exchange Server 2013 Cumulative Update 2
- Microsoft SharePoint Foundation 2010 SP1
- Microsoft SharePoint Foundation 2010 SP2
- Microsoft SharePoint Portal Server 2003 SP3
- Microsoft SharePoint Server 2007 for 32-bit SP3
- Microsoft SharePoint Server 2007 for 64-bit SP3
- Microsoft SharePoint Server 2010 SP1
- Microsoft SharePoint Server 2010 SP2
- Microsoft Windows SharePoint Services 2.0
- Microsoft Windows SharePoint Services for 32-bit 3.0 SP3
- Microsoft Windows SharePoint Services for 64-bit 3.0 SP3
- Microsoft Word Web App 2010 Service Pack 1
- Microsoft Word Web App 2010 Service Pack 2
Block external access at the network boundary, unless external parties require service.
If global access isn't needed, block access at the network perimeter to computers hosting the vulnerable application.
Run all software as a nonprivileged user with minimal access rights.
To limit the potential damage that a successful exploit may achieve, run all nonadministrative software as a regular user with the least amount of privileges required to successfully operate.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity such as unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.
Implement multiple redundant layers of security.
Since these issues may be leveraged to execute code, we recommend memory-protection schemes, such as nonexecutable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploits of memory-corruption vulnerabilities.
Updates are available. Please see the references or vendor advisory for more information.
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