High severity · published May 10, 2011
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,…
7.7
CVSS
20.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)20.1% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NF
.net Framework · Microsoft
4.0; 3.5.1; 2.0; 3.5; 2.0; 3.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-1271
CVE.org
https://www.cve.org/CVERecord?id=CVE-2011-1271
Exploit
http://stackoverflow.com/questions/2135509/bug-only-occurring-when-compile-optimization-enabled/
docs.microsoft.com
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-044
oval.cisecurity.org
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12686
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