CVE-2011-1271
high-risk
Published 2011-05-10
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."
Do I need to act?
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13.6% chance of exploitation in next 30 days
EPSS score — higher than 86% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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1 public exploit available
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.7/10
High
NETWORK
/ HIGH complexity
Affected Products (6)
Affected Vendors
References (6)
55
/ 100
high-risk
Severity
23/34 · High
Exploitability
19/34 · Moderate
Exposure
13/34 · Low