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Microsoft .NET Framework JIT Compiler Remote Buffer Overflow Vulnerability

Risk

High

Date Discovered

July 10, 2007

Description

Microsoft .NET Framework is prone to a remote buffer-overflow vulnerability because it fails to perform adequate boundary checks on user-supplied data. An attacker can exploit this issue to execute arbitrary code in the context of a user running the application. Successful exploits can result in the complete compromise of affected computers. Failed attacks will likely result in denial-of-service conditions.

Technologies Affected

  • Avaya CIE 1.0
  • Avaya CIE 1.0.2
  • Avaya Customer Interaction Express (CIE) Server 1.0
  • Avaya Customer Interaction Express (CIE) User Interface 1.0
  • Avaya Customer Interaction Express (CIE) User Interface 1.0.2
  • Avaya Messaging Application Server MM 2.0
  • Avaya Messaging Application Server MM 3.0
  • Avaya Messaging Application Server MM 3.1
  • HP Storage Management Appliance 2.1
  • Microsoft .NET Framework 2.0

Recommendations

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.

Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources.

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.
Microsoft has released security bulletin MS07-040 as well as updates to address this issue. Please see the references for details. Microsoft security bulletin MS07-040 has been revised; please see the referenced bulletin for details. Microsoft security bulletin MS07-040 has been revised to include information regarding Pack 3 for .NET 1.0 and Service pack 1 for .NET Framework 1.1; please see the referenced bulletin for details.

Credits

Jeroen Frijters of Sumatra is credited with the discovery of this issue.
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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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