Rule

--
Sid
20255

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

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

--
Detailed Information:
Microsoft .NET Framework 1.0 SP3, 1.1 SP1, 2.0 SP2, 3.5.1, and 4, and Silverlight 4 before 4.0.60831, does not properly restrict inheritance, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (aka XBAP), (2) a crafted ASP.NET application, (3) a crafted .NET Framework application, or (4) a crafted Silverlight application, aka ".NET Framework Class Inheritance Vulnerability."

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

--
Attack Scenarios:
An attacker can host a web site that will return code of their choosing to the object when a victim clicks on a malicious link.

--
Ease of Attack:
Simple. Exploits exist.

--
False Positives:
None known.

--
False Negatives:
None known.

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

Apply the appropriate vendor supplied patches.

--
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/

--
Additional References:

NIST CVE-2011-1253:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-1253
 
Common Weakness Enumeration:
http://cwe.mitre.org/data/definitions/120.html
 
Common Attack Pattern Enumeration and Classification:
http://capec.mitre.org/data/definitions/100.html

--
