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    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."

    Published:May 10, 2011
    Last Modified:Apr 11, 2025
    EPS:May 10, 2011
    EPSS Score:0.05295
    CVSS Score:7.7

    Affected Products

    Vendor
    Microsoft
    Product
    .net Framework
    Vendor
    Microsoft
    Product
    Windows 2003 Server
    Vendor
    Microsoft
    Product
    Windows 7
    Vendor
    Microsoft
    Product
    Windows Server 2003
    Vendor
    Microsoft
    Product
    Windows Server 2008
    Vendor
    Microsoft
    Product
    Windows Vista
    Vendor
    Microsoft
    Product
    Windows Xp

    Exploits

    http://stackoverflow.com/questions/2135509/bug-only-occurring-when-compile-optimization-enabled/http://stackoverflow.com/questions/2135509/bug-only-occurring-when-compile-optimization-enabled/https://www.exploit-db.com/exploits/35740

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High