CVE-2011-1271: Null Pointer Dereference
First published: Tue May 10 2011(Updated: )
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."
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| Microsoft .NET Framework 4 | =4.0 | |
| Any of | ||
| Microsoft Windows Server 2003 | =sp2 | |
| Microsoft Windows 7 | ||
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Vista | =sp1 | |
| Microsoft Windows Vista | =sp2 | |
| Microsoft Windows XP | =sp3 | |
| Microsoft Windows XP | =sp2 | |
| All of | ||
| Microsoft .NET Framework 4 | =3.5.1 | |
| Any of | ||
| Microsoft Windows 7 | ||
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server | =r2 | |
| All of | ||
| Microsoft .NET Framework 4 | =2.0-sp2 | |
| Any of | ||
| Microsoft Windows Server 2003 | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Vista | =sp1 | |
| Microsoft Windows Vista | =sp2 | |
| Microsoft Windows XP | =sp3 | |
| Microsoft Windows XP | =sp2 | |
| All of | ||
| Microsoft .NET Framework 4 | =3.5-sp1 | |
| Any of | ||
| Microsoft Windows Server 2003 | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Vista | =sp1 | |
| Microsoft Windows Vista | =sp2 | |
| Microsoft Windows XP | =sp3 | |
| Microsoft Windows XP | =sp2 | |
| All of | ||
| Microsoft .NET Framework 4 | =2.0-sp1 | |
| Any of | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Vista | =sp1 | |
| All of | ||
| Microsoft .NET Framework 4 | =3.5 | |
| Any of | ||
| Microsoft Windows Server 2003 | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Vista | =sp1 | |
| Microsoft Windows Vista | =sp2 | |
| Microsoft Windows XP | =sp3 | |
| Microsoft Windows XP | =sp2 | |
| Microsoft .NET Framework 4 | =4.0 | |
| Microsoft Windows Server 2003 | =sp2 | |
| Microsoft Windows 7 | ||
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Vista | =sp1 | |
| Microsoft Windows Vista | =sp1 | |
| Microsoft Windows Vista | =sp2 | |
| Microsoft Windows Vista | =sp2 | |
| Microsoft Windows XP | =sp3 | |
| Microsoft Windows XP | =sp2 | |
| Microsoft .NET Framework 4 | =3.5.1 | |
| Microsoft Windows 7 | =sp1 | |
| Microsoft .NET Framework 4 | =2.0-sp2 | |
| Microsoft .NET Framework 4 | =3.5-sp1 | |
| Microsoft .NET Framework 4 | =2.0-sp1 | |
| Microsoft .NET Framework 4 | =3.5 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2011-1271?
CVE-2011-1271 has a critical severity rating, as it allows attackers to execute arbitrary code under certain conditions.
How do I fix CVE-2011-1271?
To mitigate the risk of CVE-2011-1271, users should update to the latest version of Microsoft .NET Framework or apply relevant security patches.
Which versions of .NET Framework are affected by CVE-2011-1271?
CVE-2011-1271 affects Microsoft .NET Framework versions 3.5 Gold, SP1, 3.5.1, and 4.0.
Are older versions of Windows vulnerable to CVE-2011-1271?
Yes, older versions of Windows that run affected .NET Framework versions may be vulnerable to CVE-2011-1271.
What impact can CVE-2011-1271 have on my system?
CVE-2011-1271 can potentially allow attackers to bypass access restrictions and execute harmful code, compromising system integrity.
- collector/nvd-historical
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- canonical/microsoft windows server 2003
- version/microsoft windows server 2003/sp2
- canonical/microsoft windows 7
- version/microsoft windows 7/sp1
- canonical/microsoft windows server
- version/microsoft windows server/sp2
- version/microsoft windows server/r2
- canonical/microsoft windows vista
- version/microsoft windows vista/sp1
- version/microsoft windows vista/sp2
- canonical/microsoft windows xp
- version/microsoft windows xp/sp3
- version/microsoft windows xp/sp2
- version/microsoft .net framework 4/3.5.1
- version/microsoft .net framework 4/2.0-sp2
- version/microsoft .net framework 4/3.5-sp1
- version/microsoft .net framework 4/2.0-sp1
- version/microsoft .net framework 4/3.5