Rule

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Sid
17428

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Summary:
This event is generated when an attempt is made to exploit a known vulnerability in .net framework.

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Impact:
Denial of Service. Information disclosure. Loss of integrity. 

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Detailed Information:
Microsoft .NET Framework 1.1 SP1, 2.0 SP1 and SP2, 3.5, 3.5 SP1, 3.5.1, and 4.0, as used for ASP.NET in Microsoft Internet Information Services (IIS), provides detailed error codes during decryption attempts, which allows remote attackers to decrypt and modify encrypted View State (aka __VIEWSTATE) form data, and possibly forge cookies or read application files, via a padding oracle attack, aka "ASP.NET Padding Oracle Vulnerability."

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Affected Systems:
microsoft .net framework 1.0
microsoft .net framework 1.1
microsoft .net framework 2.0
microsoft .net framework 2.0
microsoft .net framework 3.5
microsoft .net framework 3.5.1
microsoft .net framework 4.0

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Attack Scenarios:


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Ease of Attack:
Medium.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Upgrade to the latest non-affected version of the software.

Apply the appropriate vendor supplied patches.

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Contributors:
Sourcefire Vulnerability Research Team
This document was generated from data supplied by the National Vulnerability Database. A product of the National Institute of Standards and Technology.
For more information see http://nvd.nist.gov/

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Additional References:

NIST CVE-2010-3332:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2010-3332
  
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