MS13-015 - Vulnerability in .NET Framework Could Allow Elevation of Privilege (2800277)

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Details
Vulnerability name/brief description MS13-015 - Vulnerability in .NET Framework Could Allow Elevation of Privilege (2800277)
CVE/CAN name
Vendor threat level Important
SophosLabs threat level Medium
Solution MS13-015
Vendor description 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.
SophosLabs comments This vulnerability can be mitigated by Disabling XAML browser applications in Internet Explorer.
SophosLabs testing result No SophosLabs testing result found
Currently known exploits No currently known exploits found
First sample seen No samples found
Discovery date 12 Feb 2013
Affected software Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows XP Service Pack 3
(KB2789643)
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows XP Professional x64 Edition Service Pack 2
(KB2789643)
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows Server 2003 Service Pack 2
(KB2789643)
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows Server 2003 x64 Edition Service Pack 2
(KB2789643)
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows Server 2003 for Itanium-based Systems Service Pack 2
(KB2789643)
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Vista Service Pack 2
(KB2789646)
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Vista x64 Edition Service Pack 2
(KB2789646)
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2
(KB2789646)
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
(KB2789646)
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
(KB2789646)
Microsoft .NET Framework 3.5
Microsoft .NET Framework 3.5 on Windows 8 for 32-bit Systems
(KB2789650)
Microsoft .NET Framework 3.5 on Windows 8 for 64-bit Systems
(KB2789650)
Microsoft .NET Framework 3.5 on Windows Server 2012
(KB2789650)
Microsoft .NET Framework 3.5.1
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems
(KB2789644)
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1
(KB2789645)
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems
(KB2789644)
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1
(KB2789645)
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems
(KB2789644)
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
(KB2789645)
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems
(KB2789644)
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
(KB2789645)
Microsoft .NET Framework 4
Microsoft .NET Framework 4 when installed on Microsoft Windows XP Service Pack 3
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Microsoft Windows XP Professional x64 Edition Service Pack 2
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Microsoft Windows Server 2003 Service Pack 2
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Microsoft Windows Server 2003 x64 Edition Service Pack 2
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Microsoft Windows Server 2003 for Itanium-based Systems Service Pack 2
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows Vista Service Pack 2
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows Vista x64 Edition Service Pack 2
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows Server 2008 for x64-based Systems Service Pack 2
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows Server 2008 for Itanium-Based Systems Service Pack 2
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows 7 for 32-bit Systems
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows 7 for 32-bit Systems Service Pack 1
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows 7 for x64-based Systems
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows 7 for x64-based Systems Service Pack 1
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for x64-based Systems
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for Itanium-Based Systems
(KB2789642)[1]
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
(KB2789642)[1]
Microsoft .NET Framework 4.5
Microsoft .NET Framework 4.5 when installed on Windows Vista Service Pack 2
(KB2789648)
Microsoft .NET Framework 4.5 when installed on Windows Vista x64 Edition Service Pack 2
(KB2789648)
Microsoft .NET Framework 4.5 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2
(KB2789648)
Microsoft .NET Framework 4.5 when installed on Windows Server 2008 for x64-based Systems Service Pack 2
(KB2789648)
Microsoft .NET Framework 4.5 when installed on Windows 7 for 32-bit Systems Service Pack 1
(KB2789648)
Microsoft .NET Framework 4.5 when installed on Windows 7 for x64-based Systems Service Pack 1
(KB2789648)
Microsoft .NET Framework 4.5 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1
(KB2789648)
Microsoft .NET Framework 4.5 on Windows 8 for 32-bit Systems
(KB2789649)
Microsoft .NET Framework 4.5 on Windows 8 for 64-bit Systems
(KB2789649)
Microsoft .NET Framework 4.5 on Windows Server 2012
(KB2789649)
Server Core installation option
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation)
(KB2789650)
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems (Server Core Installation)
(KB2789644)
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core Installation)
(KB2789645)
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
(KB2789642)[1]
Microsoft .NET Framework 4.5 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
(KB2789648)
Microsoft .NET Framework 4.5 on Windows Server 2012 (Server Core installation)
(KB2789649)
References
Credits
  • MAPP
Revisions
  • February 12, 2013 - Initial analysis written

Explanation of terms

Vulnerability Name/Brief Description:

Vendor identifier plus a brief description of the type of attack.

CVE/CAN Name:

Currently assigned CVE name. If a CVE name doesn't exist the CAN name will be used until a CVE has been assigned.

Vendor Threat Level:

Threat level assigned by the vendor

SophosLabs Threat Level:

Threat level assigned by SophosLabs

  • LOW RISK - There is little chance of this vulnerability being actively exploited by malware.
  • MEDIUM RISK - There is a possibility of this vulnerability being actively exploited by malware.
  • HIGH RISK - There is a strong possibility of this vulnerability being actively exploited by malware.
  • CRITICAL RISK - This vulnerability will almost certainly be actively exploited by malware.

Solution:

Vendor-supplied Patch identifier and recommended solution, or workaround if applicable.

Vendor Description:

Summary of the cause and potential effect of the vulnerability provided by the vendor.

SophosLabs Comments:

SophosLabs' opinions and observations of the vulnerability in question.

SophosLabs Testing Result:

Details of completed lab testing, if applicable. Please note that the lab test environment may differ significantly from user environments.

Currently Known Exploits:

List of identities for known exploits, if applicable.

First Sample Seen:

Date of the first sample seen by SophosLabs.

Discovery Date:

Date of the earliest known publically disclosed advisory.

Affected Software:

Vulnerable platforms and software versions.