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  3. Microsoft Windows CVE-2015-6125 DNS Use After Free Remote Code Execution Vulnerability

Microsoft Windows CVE-2015-6125 DNS Use After Free Remote Code Execution Vulnerability

Risk

High

Date Discovered

December 8, 2015

Description

Microsoft Windows is prone to a remote code-execution vulnerability. Successful exploits can allow attackers to execute arbitrary code within the context of the Local System Account. Failed exploit attempts will result in a denial-of-service condition.

Technologies Affected

  • Microsoft Windows Server 2008 R2 for x64-based Systems SP1
  • Microsoft Windows Server 2008 for 32-bit Systems SP2
  • Microsoft Windows Server 2008 for x64-based Systems SP2
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 R2

Recommendations

Block external access at the network boundary, unless external parties require service.

If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.

Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities in applications. Review all applicable logs regularly.

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.

Credits

Microsoft
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Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
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