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Fencer Vulns
high 7.5

CVE-2003-0818 in the critical feed json

Multiple integer overflows in Microsoft ASN.1 library (MSASN1.DLL), as used in LSASS.EXE, CRYPT32.DLL, and other Microsoft executables and…

published 2004-02-11 22 y ago modified 2026-06-16 4 mo ago also EUVD-2003-0809

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
82.2%
EPSS 82.2% chance of exploitation in 30 days, percentile 99.6%
public exploits
4
Metasploit, Exploit-DB

Summary

Multiple integer overflows in Microsoft ASN.1 library (MSASN1.DLL), as used in LSASS.EXE, CRYPT32.DLL, and other Microsoft executables and libraries on Windows NT 4.0, 2000, and XP, allow remote attackers to execute arbitrary code via ASN.1 BER encodings with (1) very large length fields that cause arbitrary heap data to be overwritten, or (2) modified bit strings.

Timeline

  1. First public exploit (Metasploit exploit/windows/smb/ms04_007_killbill)
  2. Published

Exploit prediction

82.24% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/windows/smb/ms04_007_killbill MS04-007 Microsoft ASN.1 Library Bitstring Heap Overflow metasploit exploit, low rank, 2004-02-10
  • EDB-16377 Microsoft Windows - ASN.1 Library Bitstring Heap Overflow (MS04-007) (Metasploit) remote, 2010-07-25
  • EDB-3022 Microsoft Windows - ASN.1 Remote (MS04-007) remote, 2004-03-26
  • EDB-153 Microsoft Windows - ASN.1 'LSASS.exe' Remote Denial of Service (MS04-007) dos, 2004-02-14

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.