CVE-2011-1253

Critical

Description

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."

SeverityCritical

CVSS9.3

Exploit probability—

Product

Microsoft .net Framework

PublishedOct 12, 2011

First seenOct 12, 2011

How to fix

Vendor advisories

docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-078

Affected products

Product	Affected versions	Fixed in
microsoft .net_framework	1.0, 1.1, 2.0, 3.5.1, 4.0	—
microsoft silverlight	4.0.60531.0	—

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