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High severity7.7NVD Advisory· Published May 10, 2011· Updated Jun 16, 2026

CVE-2011-1271

CVE-2011-1271

Description

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."

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Affected products

7
  • Microsoft/.net Framework7 versions
    cpe:2.3:a:microsoft:.net_framework:2.0:sp1:*:*:*:*:*:*+ 6 more
    • cpe:2.3:a:microsoft:.net_framework:2.0:sp1:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:.net_framework:2.0:sp2:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:.net_framework:3.5.1:*:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:.net_framework:3.5:sp1:*:*:*:*:*:*
    • cpe:2.3:a:microsoft:.net_framework:4.0:*:*:*:*:*:*:*
    • (no CPE)range: 3.5, 3.5 SP1, 3.5.1, 4.0

Patches

Vulnerability mechanics

References

3

News mentions

0

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