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    CVE-2005-1935

    Heap-based buffer overflow in the BERDecBitString function in Microsoft ASN.1 library (MSASN1.DLL) allows remote attackers to execute arbitrary code via nested constructed bit strings, which leads to a realloc of a non-null pointer and causes the function to overwrite previously freed memory, as demonstrated using a SPNEGO token with a constructed bit string during HTTP authentication, and a different vulnerability than CVE-2003-0818. NOTE: the researcher has claimed that MS:MS04-007 fixes this issue.

    Published:Jun 9, 2005
    Last Modified:Apr 16, 2026
    EPS:Jun 9, 2005
    EPSS Score:0.32706
    CVSS Score:7.5

    Affected Products

    Vendor
    Microsoft
    Product
    Windows 2000
    Vendor
    Microsoft
    Product
    Windows 2003 Server
    Vendor
    Microsoft
    Product
    Windows Nt
    Vendor
    Microsoft
    Product
    Windows Xp

    Exploits

    http://www.phreedom.org/solar/exploits/msasn1-bitstring/http://www.phreedom.org/solar/exploits/msasn1-bitstring/

    Common Weakness Enumeration

    No CWE recorded yet

    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