CVSS 3.1
7.7 highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:LCVE-2011-1271
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."
Severity
- EPSS
- 20% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-264, CWE-476
- Published
- Modified
- Record from
- the NVD, synced
Affected
- microsoft:.net_framework
References
- http://stackoverflow.com/questions/2135509/bug-only-occurring-when-compile-optimization-enabled/
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-044
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12686
- http://stackoverflow.com/questions/2135509/bug-only-occurring-when-compile-optimization-enabled/
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-044