December 8, 2015
Microsoft Windows is prone to a remote code-execution vulnerability. An attacker can leverage this issue to execute arbitrary code in the context of the affected application. Failed exploit attempts will likely result in denial-of-service conditions.
- Microsoft Windows 7 for 32-bit Systems SP1
- Microsoft Windows 7 for x64-based Systems SP1
- Microsoft Windows Server 2008 R2 for Itanium-based Systems SP1
- Microsoft Windows Server 2008 R2 for x64-based Systems SP1
Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
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. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.
Do not follow links provided by unknown or untrusted sources.
Never follow links provided by unknown or untrusted sources.
Since the exploitation of some of this issue allows the execution of malicious script code in web clients, consider disabling support for script code and active content within the client browser. Note that this mitigation tactic might adversely affect websites that rely on the execution of browser-based script code.
Implement multiple redundant layers of security.
Since this issue 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.
Hossein Lotfi, Secunia Research (now part of Flexera Software)
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