August 9, 2011
The Microsoft .NET Framework is prone to a remote information-disclosure vulnerability.
Attackers can exploit this issue to gain access to sensitive information that may aid in further attacks.
Attackers can exploit this issue by submitting a specially crafted request to a vulnerable ASP.NET server.
- Microsoft .NET Framework 4.0
- Microsoft Chart Controls for .NET Framework 3.5 SP1
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.
Run all software as a nonprivileged user with minimal access rights.
To limit the consequences of a successful exploit, run the application with the least privilege required.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
Vendor updates are available. Please see the references for more information.
Nico Leidecker and James Forshaw of Context Information Security.
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