Microsoft .NET Framework 2.0 SP2/3.5/3.5.1/4/4.5 XML File input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Microsoft .NET Framework 2.0 SP2/3.5/3.5.1/4/4.5. Affected by this vulnerability is an unknown functionality of the component XML File Handler. The manipulation as part of File leads to input validation. This vulnerability is listed as CVE-2013-1336. The attack may be initiated remotely. In addition, an exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Microsoft .NET Framework 2.0 SP2/3.5/3.5.1/4/4.5 (Programming Language Software). This issue affects an unknown functionality of the component XML File Handler. The manipulation as part of a File leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, and integrity. The summary by CVE is:

The Common Language Runtime (CLR) in Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, and 4.5 does not properly check signatures, which allows remote attackers to make undetected changes to signed XML documents via unspecified vectors that preserve signature validity, aka "XML Digital Signature Spoofing Vulnerability."

The weakness was presented 05/14/2013 by James Forshaw with Context Information Security as MS13-040 as confirmed bulletin (Microsoft Technet). It is possible to read the advisory at technet.microsoft.com. The public release was coordinated in cooperation with Microsoft. The identification of this vulnerability is CVE-2013-1336 since 01/12/2013. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a private exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 66415 (MS13-040: Vulnerabilities in .NET Framework Could Allow Spoofing (2836440)), 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 90885 (Microsoft .Net Framework Spoofing and Authentication Bypass Vulnerabilities (MS13-040)).

Applying the patch MS13-040 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13054.

The vulnerability is also documented in the databases at Tenable (66415), SecurityFocus (BID 59789†), OSVDB (93301†), Secunia (SA53350†) and Vulnerability Center (SBV-39577†). nakedsecurity.sophos.com is providing further details. See VDB-8711, VDB-8712, VDB-8713 and VDB-8714 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.5
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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Exploitinginfo

Class: Input validation
CWE: CWE-20
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ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Unproven

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Current Price Estimation: 🔍

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Nessus ID: 66415
Nessus Name: MS13-040: Vulnerabilities in .NET Framework Could Allow Spoofing (2836440)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: MS13-040
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

PaloAlto IPS: 🔍
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Timelineinfo

01/12/2013 🔍
05/14/2013 +122 days 🔍
05/14/2013 +0 days 🔍
05/14/2013 +0 days 🔍
05/14/2013 +0 days 🔍
05/14/2013 +0 days 🔍
05/15/2013 +1 days 🔍
05/15/2013 +0 days 🔍
05/16/2013 +1 days 🔍
05/11/2021 +2917 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS13-040
Researcher: James Forshaw
Organization: Context Information Security
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-1336 (🔍)
GCVE (CVE): GCVE-0-2013-1336
GCVE (VulDB): GCVE-100-8723

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 59789 - Microsoft .NET Framework XML Digital Signature CVE-2013-1336 Security Bypass Vulnerability
Secunia: 53350 - Microsoft .Net Framework Two Security Bypass Vulnerabilities, Less Critical
OSVDB: 93301
Vulnerability Center: 39577 - [MS13-040] Microsoft .NET Framework Remote Spoofing of XML Digital Signature Validity, Medium

Misc.: 🔍
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Entryinfo

Created: 05/15/2013 16:18
Updated: 05/11/2021 12:26
Changes: 05/15/2013 16:18 (81), 04/05/2017 16:11 (10), 05/11/2021 12:26 (3)
Complete: 🔍
Committer:
Cache ID: 216:022:103

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