Rule

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Sid
20884

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Summary:
This event is generated when an attempt is made to exploit a known vulnerability in anti-cross site scripting library.

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

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Detailed Information:
The Microsoft Anti-Cross Site Scripting (AntiXSS) Library 3.x and 4.0 does not properly evaluate characters after the detection of a Cascading Style Sheets (CSS) escaped character, which allows remote attackers to conduct cross-site scripting (XSS) attacks via HTML input, aka "AntiXSS Library Bypass Vulnerability."

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Affected Systems:
microsoft anti-cross site scripting library 3.1
microsoft anti-cross site scripting library 4.0

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Attack Scenarios:


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Ease of Attack:
Difficult.

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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-2012-0007:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-0007
  
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