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Vulnerability Score 7.5 7.5
CVE Id CVE-2005-1935
Last Modified 05 Sep 2008 04:50:28
Published 13 Jun 2005 12:00:00
Confidentiality Impact PARTIAL PARTIAL
Integrity Impact PARTIAL PARTIAL
Availability Impact PARTIAL PARTIAL
Access Vector NETWORK
Access Complexity LOW
Authentication NONE



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.

Vulnerable Systems

Operating System

  • Microsoft Windows 2000

  • Microsoft Windows 2003 Server 64-bit

  • Microsoft Windows 2003 Server R2

  • Microsoft Windows Nt 4.0

  • Microsoft Windows Xp


XF - asn1-constructed-heap-overflow(20870)


Last Updated: 27 May 2016 10:40:20