Microsoft .NET Framework up to 4 input validation

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A vulnerability has been found in Microsoft .NET Framework up to 4 (Programming Language Software) and classified as problematic. This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Microsoft .NET Framework 1.0 SP3, 1.1 SP1, 2.0 SP2, 3.0 SP2, 3.5 SP1, 3.5.1, and 4 does not properly handle an unspecified exception during use of partially trusted assemblies to serialize input data, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (aka XBAP) or (2) a crafted .NET Framework application, aka ".NET Framework Serialization Vulnerability."

The weakness was presented 05/08/2012 by James Forshaw with Context Information Security as MS12-035 as confirmed knowledge base article (Website) via Microsoft. The advisory is shared for download at The public release was coordinated in cooperation with the vendor. This vulnerability was named CVE-2012-0161 since 12/13/2011. The attack can be initiated remotely. Required for exploitation is a single authentication. Technical details are unknown but a private exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 59043 (MS12-035: Vulnerabilities in .NET Framework Could Allow Remote Code Execution (2693777)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90801 (Microsoft .NET Framework Remote Code Execution Vulnerabilities (MS12-035)).

Applying the patch MS12-MAY is able to eliminate this problem. The bugfix is ready for download at A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (74376) and Tenable (59043). See 5357, 5358, 5359 and 5360 for similar entries.







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.5

VulDB Base Score: 6.3
VulDB Temp Score: 5.5
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Class: Input validation
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Unproven

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Nessus ID: 59043
Nessus Name: MS12-035: Vulnerabilities in .NET Framework Could Allow Remote Code Execution (2693777)
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OpenVAS ID: 902833
OpenVAS Name: Microsoft .NET Framework Remote Code Execution Vulnerability (2693777)
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Threat Intelligenceinfo

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Recommended: Patch
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Patch: MS12-MAY


12/13/2011 🔍
05/08/2012 +146 days 🔍
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05/09/2012 +1 days 🔍
05/11/2012 +2 days 🔍
03/24/2021 +3239 days 🔍



Advisory: MS12-035
Researcher: James Forshaw
Organization: Context Information Security
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2012-0161 (🔍)

X-Force: 74376 - Microsoft .NET Framework input code execution, High Risk
SecurityTracker: 1027036 - Microsoft .NET Framework Serialization Bugs Let Remote Users Execute Arbitrary Code
Vulnerability Center: 35026 - [MS12-035] .NET Framework Serialization Vulnerability Allows Remote Code Execution - CVE-2012-0161, Critical
SecurityFocus: 53357 - Microsoft .NET Framework Serialization CVE-2012-0161 Remote Code Execution Vulnerability
Secunia: 49117 - Microsoft .NET Framework Two Serialization Vulnerabilities, Highly Critical
OSVDB: 81733 - Microsoft .NET Framework Partially Trusted Assembly Object Serialization Remote Code Execution

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Created: 05/11/2012 06:04 PM
Updated: 03/24/2021 01:47 PM
Changes: 05/11/2012 06:04 PM (54), 04/05/2017 03:07 PM (30), 03/24/2021 01:35 PM (8), 03/24/2021 01:42 PM (2), 03/24/2021 01:47 PM (1)
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