2013-02-12 This security update resolves one privately reported vulnerability in the .NET Framework. The vulnerability could allow elevation of privilege if a user views a specially crafted webpage using a web browser that can run XAML Browser Applications (XBAPs). The vulnerability could also be used by Windows .NET applications to bypass Code Access Security (CAS) restrictions. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Vulnerabilities addressed in this bulletin:
WinForms Callback Elevation Vulnerability
An elevation of privilege vulnerability exists in the way that the .NET Framework elevates the permissions of a callback function when a particular Windows Forms object is created. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. The vulnerability is the result of the .NET Framework improperly elevating the permissions of a callback function when a particular WinForms object is created.

Bulletin details at Microsoft.com

Related CVE Entries

The Windows Forms (aka WinForms) component in Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, and 4.5 does not properly restrict the privileges of a callback function during object creation, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (XBAP) or (2) a crafted .NET Framework application, aka "WinForms Callback Elevation Vulnerability."
Max CVSS
10.0
EPSS Score
58.91%
Published
2013-02-13
Updated
2023-12-07
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