Multiple integer overflows in Microsoft ASN.1 library (MSASN1.DLL), as used in LSASS.EXE…
Priority HIGH 74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
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.
Why it matters now
EPSS 0.82241 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 38
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2000:*:sp1:*:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2000:*:sp2:*:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2000:*:sp3:*:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2003_server:enterprise:*:64-bit:*:*:*:*:* | enterprise | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2003_server:enterprise_64-bit:*:*:*:*:*:*:* | enterprise_64-bit | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2003_server:r2:*:64-bit:*:*:*:*:* | r2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2003_server:r2:*:datacenter_64-bit:*:*:*:*:* | r2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2003_server:standard:*:64-bit:*:*:*:*:* | standard | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2003_server:web:*:*:*:*:*:*:* | web | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2000:*:sp1:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2000:*:sp2:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2000:*:sp3:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2003_server:enterprise:*:64-bit:*:*:*:*:* Versions enterprise Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2003_server:enterprise_64-bit:*:*:*:*:*:*:* Versions enterprise_64-bit Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2003_server:r2:*:64-bit:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2003_server:r2:*:datacenter_64-bit:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2003_server:standard:*:64-bit:*:*:*:*:* Versions standard Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2003_server:web:*:*:*:*:*:*:* Versions web Vulnerable ·Microsoft
Show 28 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_nt:4.0:*:server:*:*:*:*:* | 4.0 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:*:terminal_server:*:*:*:*:* | 4.0 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:*:workstation:*:*:*:*:* | 4.0 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp1:server:*:*:*:*:* | 4.0 sp1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp1:terminal_server:*:*:*:*:* | 4.0 sp1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp1:workstation:*:*:*:*:* | 4.0 sp1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp2:server:*:*:*:*:* | 4.0 sp2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp2:terminal_server:*:*:*:*:* | 4.0 sp2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp2:workstation:*:*:*:*:* | 4.0 sp2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp3:server:*:*:*:*:* | 4.0 sp3 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp3:terminal_server:*:*:*:*:* | 4.0 sp3 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp3:workstation:*:*:*:*:* | 4.0 sp3 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp4:server:*:*:*:*:* | 4.0 sp4 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp4:terminal_server:*:*:*:*:* | 4.0 sp4 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp4:workstation:*:*:*:*:* | 4.0 sp4 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp5:server:*:*:*:*:* | 4.0 sp5 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp5:terminal_server:*:*:*:*:* | 4.0 sp5 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp5:workstation:*:*:*:*:* | 4.0 sp5 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp6:server:*:*:*:*:* | 4.0 sp6 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp6:terminal_server:*:*:*:*:* | 4.0 sp6 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp6:workstation:*:*:*:*:* | 4.0 sp6 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:server:*:*:*:*:* | 4.0 sp6a | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:workstation:*:*:*:*:* | 4.0 sp6a | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_xp:*:*:64-bit:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_xp:*:*:home:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_xp:*:gold:professional:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_xp:*:sp1:64-bit:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_xp:*:sp1:home:*:*:*:*:* | all versions | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_nt:4.0:*:server:*:*:*:*:* Versions 4.0 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:*:terminal_server:*:*:*:*:* Versions 4.0 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:*:workstation:*:*:*:*:* Versions 4.0 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp1:server:*:*:*:*:* Versions 4.0 sp1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp1:terminal_server:*:*:*:*:* Versions 4.0 sp1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp1:workstation:*:*:*:*:* Versions 4.0 sp1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp2:server:*:*:*:*:* Versions 4.0 sp2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp2:terminal_server:*:*:*:*:* Versions 4.0 sp2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp2:workstation:*:*:*:*:* Versions 4.0 sp2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp3:server:*:*:*:*:* Versions 4.0 sp3 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp3:terminal_server:*:*:*:*:* Versions 4.0 sp3 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp3:workstation:*:*:*:*:* Versions 4.0 sp3 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp4:server:*:*:*:*:* Versions 4.0 sp4 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp4:terminal_server:*:*:*:*:* Versions 4.0 sp4 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp4:workstation:*:*:*:*:* Versions 4.0 sp4 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp5:server:*:*:*:*:* Versions 4.0 sp5 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp5:terminal_server:*:*:*:*:* Versions 4.0 sp5 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp5:workstation:*:*:*:*:* Versions 4.0 sp5 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp6:server:*:*:*:*:* Versions 4.0 sp6 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp6:terminal_server:*:*:*:*:* Versions 4.0 sp6 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp6:workstation:*:*:*:*:* Versions 4.0 sp6 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:server:*:*:*:*:* Versions 4.0 sp6a Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:workstation:*:*:*:*:* Versions 4.0 sp6a Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_xp:*:*:64-bit:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_xp:*:*:home:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_xp:*:gold:professional:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_xp:*:sp1:64-bit:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_xp:*:sp1:home:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2003-0818
- 2026-10-03 Alias added: GHSA-whjg-p56q-xrf9
References
Other 8
- oval:org.mitre.oval:def:653
- 20040210 EEYE: Microsoft ASN.1 Library Length Overflow Heap Corruption
- 20040210 EEYE: Microsoft ASN.1 Library Bit String Heap Corruption
- oval:org.mitre.oval:def:799
- oval:org.mitre.oval:def:796
- 20040210 EEYE: Microsoft ASN.1 Library Bit String Heap Corruption
- 20040210 EEYE: Microsoft ASN.1 Library Length Overflow Heap Corruption
- oval:org.mitre.oval:def:797
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- TI-2009-01065 The kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold… KEVCVSS 3.1HIGH 7.8
- TI-2004-00181 The POSIX component of Microsoft Windows NT and Windows 2000 allows local users to… KEVCVSS 3.1HIGH 7.8
- TI-2002-00354 smss.exe debugging subsystem in Windows NT and Windows 2000 does not properly… KEVCVSS 3.1HIGH 7.8
Sources
- CVE-2003-0818 · CVE Program
- CVE-2003-0818 · NVD
- FIRST EPSS
- GHSA-whjg-p56q-xrf9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences