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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 20.1%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
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."
- CVSS 3.1
- 7.7 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
- EPSS
- 20.10% probability · 97th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-264, CWE-476
- Affected
- microsoft/.net framework
- Source
- secure@microsoft.com
References
- http://stackoverflow.com/questions/2135509/bug-only-occurring-when-compile-optimization-enabled/Exploit
- 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/Exploit
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.