CVE-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."
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.7 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
microsoftCNA
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CVEADP
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CISA-ADPADP
7.7 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 87%
VendorProductVersion
microsoft.net_framework
4.0
microsoft.net_framework
3.5.1
microsoft.net_framework
2.0:sp2
microsoft.net_framework
3.5:sp1
microsoft.net_framework
2.0:sp1
microsoft.net_framework
3.5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
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
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12686