CVE-2011-1271 : The JIT compiler in Microsoft .NET Framework 3.5 Gold and SP1, 3.5.1, and 4.0, w

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."

Published 2011-05-10 19:55:02

Updated 2023-12-07 18:38:57

Source Microsoft Corporation

View at NVD, CVE.org

Vulnerability category: Execute code

Products affected by CVE-2011-1271

Microsoft » .net Framework » Version: 2.0 Update SP2
cpe:2.3:a:microsoft:.net_framework:2.0:sp2:*:*:*:*:*:*
Matching versions
When used together with: Microsoft » Windows 2003 Server » Update SP2
When used together with: Microsoft » Windows Server 2003 » Update SP2
When used together with: Microsoft » Windows Server 2008 » Itanium Edition
When used together with: Microsoft » Windows Server 2008 » X32 Edition
When used together with: Microsoft » Windows Server 2008 » X64 Edition
When used together with: Microsoft » Windows Server 2008 » Update SP2 X32 Edition
When used together with: Microsoft » Windows Server 2008 » Update SP2 X64 Edition
When used together with: Microsoft » Windows Server 2008 » Version: N/A Update SP2 Itanium Edition
When used together with: Microsoft » Windows Vista » Update SP1
When used together with: Microsoft » Windows Vista » Update SP2
When used together with: Microsoft » Windows Xp » Update SP3
When used together with: Microsoft » Windows Xp » Version: N/A Update SP2 X64 Edition
Microsoft » .net Framework » Version: 2.0 Update SP1
cpe:2.3:a:microsoft:.net_framework:2.0:sp1:*:*:*:*:*:*
Matching versions
When used together with: Microsoft » Windows Server 2008 » Itanium Edition
When used together with: Microsoft » Windows Server 2008 » X32 Edition
When used together with: Microsoft » Windows Server 2008 » X64 Edition
When used together with: Microsoft » Windows Vista » Update SP1
Microsoft » .net Framework » Version: 3.5
cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*
Matching versions
When used together with: Microsoft » Windows 2003 Server » Update SP2
When used together with: Microsoft » Windows Server 2003 » Update SP2
When used together with: Microsoft » Windows Server 2008 » Itanium Edition
When used together with: Microsoft » Windows Server 2008 » X32 Edition
When used together with: Microsoft » Windows Server 2008 » X64 Edition
When used together with: Microsoft » Windows Vista » Update SP1
When used together with: Microsoft » Windows Vista » Update SP2
When used together with: Microsoft » Windows Xp » Update SP3
When used together with: Microsoft » Windows Xp » Version: N/A Update SP2 X64 Edition
Microsoft » .net Framework » Version: 3.5 Update SP1
cpe:2.3:a:microsoft:.net_framework:3.5:sp1:*:*:*:*:*:*
Matching versions
When used together with: Microsoft » Windows 2003 Server » Update SP2
When used together with: Microsoft » Windows Server 2003 » Update SP2
When used together with: Microsoft » Windows Server 2008 » Itanium Edition
When used together with: Microsoft » Windows Server 2008 » X32 Edition
When used together with: Microsoft » Windows Server 2008 » X64 Edition
When used together with: Microsoft » Windows Server 2008 » Update SP2 X32 Edition
When used together with: Microsoft » Windows Server 2008 » Update SP2 X64 Edition
When used together with: Microsoft » Windows Server 2008 » Version: N/A Update SP2 Itanium Edition
When used together with: Microsoft » Windows Vista » Update SP1
When used together with: Microsoft » Windows Vista » Update SP2
When used together with: Microsoft » Windows Xp » Update SP3
When used together with: Microsoft » Windows Xp » Version: N/A Update SP2 X64 Edition
Microsoft » .net Framework » Version: 3.5.1
cpe:2.3:a:microsoft:.net_framework:3.5.1:*:*:*:*:*:*:*
Matching versions
When used together with: Microsoft » Windows 7 » Version: N/A
When used together with: Microsoft » Windows 7 » Version: N/A Update SP1 X64 Edition
When used together with: Microsoft » Windows 7 » Version: N/A Update SP1 X86 Edition
When used together with: Microsoft » Windows Server 2008 » Version: R2 Itanium Edition
When used together with: Microsoft » Windows Server 2008 » Version: R2 X64 Edition
Microsoft » .net Framework » Version: 4.0
cpe:2.3:a:microsoft:.net_framework:4.0:*:*:*:*:*:*:*
Matching versions
When used together with: Microsoft » Windows 2003 Server » Update SP2
When used together with: Microsoft » Windows 7 » Version: N/A
When used together with: Microsoft » Windows 7 » Version: N/A Update SP1 X86 Edition
When used together with: Microsoft » Windows Server 2003 » Update SP2
When used together with: Microsoft » Windows Server 2008 » Itanium Edition
When used together with: Microsoft » Windows Server 2008 » X32 Edition
When used together with: Microsoft » Windows Server 2008 » X64 Edition
When used together with: Microsoft » Windows Server 2008 » Update SP2 X32 Edition
When used together with: Microsoft » Windows Server 2008 » Update SP2 X64 Edition
When used together with: Microsoft » Windows Server 2008 » Version: N/A Update SP2 Itanium Edition
When used together with: Microsoft » Windows Server 2008 » Version: R2 Itanium Edition
When used together with: Microsoft » Windows Server 2008 » Version: R2 X64 Edition
When used together with: Microsoft » Windows Vista » Update SP1
When used together with: Microsoft » Windows Vista » Update SP2
When used together with: Microsoft » Windows Xp » Update SP3
When used together with: Microsoft » Windows Xp » Version: N/A Update SP2 X64 Edition

Exploit prediction scoring system (EPSS) score for CVE-2011-1271

EPSS FAQ

0.75%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 78 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2011-1271

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
5.1	MEDIUM	AV:N/AC:H/Au:N/C:P/I:P/A:P	4.9	6.4	NIST
Access Vector: Network Access Complexity: High Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial

CWE ids for CVE-2011-1271

CWE-264

Assigned by: nvd@nist.gov (Primary)

References for CVE-2011-1271

http://stackoverflow.com/questions/2135509/bug-only-occurring-when-compile-optimization-enabled/

c# - Bug only occurring when compile optimization enabled - Stack Overflow
Exploit
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12686

Repository / Oval Repository
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-044

Microsoft Security Bulletin MS11-044 - Critical | Microsoft Docs

Jump to

Vulnerability Details : CVE-2011-1271

Products affected by CVE-2011-1271

Exploit prediction scoring system (EPSS) score for CVE-2011-1271

CVSS scores for CVE-2011-1271

CWE ids for CVE-2011-1271

References for CVE-2011-1271