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.

Affected products

Asn.1 Library

Microsoft Windows 2000

All versions

Microsoft Windows 2003 Server

= 64-bit, R2

Microsoft Windows Nt

= 4.0

Microsoft Windows Xp

All versions

CVSS 2.0

7.5 HIGH

EPSS

26.6% (98th percentile)

NVD status

Modified

Published

2005-06-09