CVE-2003-0818
Multiple integer overflows in Microsoft ASN.1 library (MSASN1.DLL), as used in LSASS.EXE, CRYPT32...
CVE-2003-0818 is a high vulnerability (CVSS 7.5) in Microsoft Windows Nt, published February 11, 2004. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 82.2%, the 99th percentile. No source names a fixed version.
- Severity
- 7.5 HighCVSS 2.0, NVD
- Exploit chance
- 82.2%EPSS, 99th percentile
- Exploitation
- None known4 public exploits
- Fixed in
- No fix listedNo source names one
Description
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.
Exploit likelihood
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Metasploit | MS04-007 Microsoft ASN.1 Library Bitstring Heap Overflow | 2004-02-10 |
| Exploit-DB | Microsoft Windows - ASN.1 'LSASS.exe' Remote Denial of Service (MS04-007) | 2004-02-14 |
| Exploit-DB | Microsoft Windows - ASN.1 Remote (MS04-007) | 2004-03-26 |
| Exploit-DB | Microsoft Windows - ASN.1 Library Bitstring Heap Overflow (MS04-007) (Metasploit) | 2010-07-25 |
What each source reports
NVD Score used
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.
- Record
CVE-2003-0818- CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE ListNo score
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.
- Record
CVE-2003-0818- Updated
- 2026-11-02
EUVDEUVD-2003-0809No score
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.
- Record
EUVD-2003-0809- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-whjg-p56q-xrf9No score
Multiple integer overflows in Microsoft ASN.1 library (MSASN1.DLL), as used in LSASS.EXE, CRYPT32...
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.
- Record
GHSA-whjg-p56q-xrf9- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| exploits, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, Metasploit, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
kb.cert.org/vuls/id/583108
us-cert.gov/cas/techalerts/TA04-041A.html
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A653
marc.info?l=bugtraq&m=107643836125615&w=2
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docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-007
nvd.nist.gov/vuln/detail/CVE-2003-0818
github.com/advisories/GHSA-whjg-p56q-xrf9