Microsoft .NET Framework 3.5 SP1/3.5.1/4.0 Access Restriction access control

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Microsoft .NET Framework 3.5 SP1/3.5.1/4.0. Affected by this issue is some unknown functionality of the component Access Restriction. Such manipulation leads to access control. This vulnerability is referenced as CVE-2011-1271. It is possible to launch the attack remotely. Furthermore, an exploit is available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in Microsoft .NET Framework 3.5 SP1/3.5.1/4.0 (Programming Language Software). It has been rated as critical. Affected by this issue is an unknown part of the component Access Restriction. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The JIT compiler in Microsoft .NET Framework 3.5 Gold and SP1, 3.5.1, and 4.0, when IsJITOptimizerDisabled is false, does not properly handle expressions related to null strings, which allows context-dependent attackers to bypass intended access restrictions, and consequently execute arbitrary code, in opportunistic circumstances by leveraging a crafted application, as demonstrated by (1) a crafted XAML browser application (aka XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka ".NET Framework JIT Optimization Vulnerability."

The weakness was published 05/10/2011 as MS11-044 as confirmed bulletin (Technet). The advisory is available at microsoft.com. This vulnerability is handled as CVE-2011-1271 since 03/04/2011. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 55124 (MS11-044: Vulnerability in .NET Framework Could Allow Remote Code Execution (2538814)), 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 90710 (Microsoft .NET Framework Remote Code Execution Vulnerability (MS11-044)).

Applying the patch MS11-044 is able to eliminate this problem. The bugfix is ready for download at microsoft.com.

The vulnerability is also documented in the databases at X-Force (67411), Exploit-DB (35740), Tenable (55124), SecurityFocus (BID 47834†) and Vulnerability Center (SBV-31780†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.7
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Price Prediction: 🔍
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Nessus ID: 55124
Nessus Name: MS11-044: Vulnerability in .NET Framework Could Allow Remote Code Execution (2538814)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 902522
OpenVAS Name: Microsoft .NET Framework Remote Code Execution Vulnerability (2538814)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS11-044

Timelineinfo

03/04/2011 🔍
03/04/2011 +0 days 🔍
03/04/2011 +0 days 🔍
05/10/2011 +67 days 🔍
05/10/2011 +0 days 🔍
06/15/2011 +36 days 🔍
06/15/2011 +0 days 🔍
03/23/2015 +1377 days 🔍
06/02/2025 +3724 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS11-044
Status: Confirmed

CVE: CVE-2011-1271 (🔍)
GCVE (CVE): GCVE-0-2011-1271
GCVE (VulDB): GCVE-100-57410

OVAL: 🔍
IAVM: 🔍

X-Force: 67411
SecurityFocus: 47834 - Microsoft .NET Framework JIT Compiler Optimization NULL String Remote Code Execution Vulnerability
Vulnerability Center: 31780 - [MS11-044] Microsoft .NET Framework before 4 beta 2 Security Bypass Vulnerability, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/23/2015 16:50
Updated: 06/02/2025 18:15
Changes: 03/23/2015 16:50 (67), 04/05/2017 15:14 (9), 11/07/2021 08:39 (3), 10/17/2024 23:04 (26), 01/15/2025 17:36 (2), 06/02/2025 18:15 (11)
Complete: 🔍
Cache ID: 216::103

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