Current Description

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.

Basic Data

PublishedJune 13, 2005
Last ModifiedJuly 11, 2017
Data TypeCVE
Data FormatMITRE
Data Version4.0
Problem TypeNVD-CWE-Other
CVE Data Version4.0

Base Metric V2

CVSS 2 - Version2.0
CVSS 2 - Vector StringAV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS 2 - Access VectorNETWORK
CVSS 2 - Access ComplexityLOW
CVSS 2 - AuthenticationNONE
CVSS 2 - Confidentiality ImpactPARTIAL
CVSS 2 - Availability ImpactPARTIAL
CVSS 2 - Base Score7.5
Exploitability Score10.0
Impact Score6.4
Obtain All Privilegefalse
Obtain User Privilegetrue
Obtain Other Privilegefalse

Base Metric V3

No data provided.


  • OR - Configuration 1
    Cpe VersionPartVendorProductVersionUpdateEditionLanguageSW EditionTarget SWTarget HWOtherVersion Start IncludingVersion End IncludingVersion Start ExcludingVersion End Excluding
    2.3OSMicrosoftWindows 2000*sp2******
    2.3OSMicrosoftWindows 2000*sp3******
    2.3OSMicrosoftWindows 2000*sp4*fr****
    2.3OSMicrosoftWindows 2003 Server64-bit*******
    2.3OSMicrosoftWindows 2003 Serverr2*******
    2.3OSMicrosoftWindows Nt4.0sp6terminal_server*****
    2.3OSMicrosoftWindows Nt4.0sp6aserver*****
    2.3OSMicrosoftWindows Nt4.0sp6aworkstation*****
    2.3OSMicrosoftWindows Xp**64-bit*****
    2.3OSMicrosoftWindows Xp*gold******
    2.3OSMicrosoftWindows Xp*sp164-bit*****
    2.3OSMicrosoftWindows Xp*sp1tablet_pc*****

Vulnerable Software List

Microsoft Windows Xp *
Microsoft Windows 2000 *
Microsoft Windows 2003 Server 64-bit, r2
Microsoft Windows Nt 4.0