CVE-2003-0818
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.
Official description from the CVE record, published by mitre. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org
Key data
EPSS
- Score
- 0.82241 (82.2% probability)
- Percentile
- 99.7%
- Scores of
- Nov 10, 2026
- Model
- v2026.06.15
References
- VU#583108 (kb.cert.org)third-party-advisory
- TA04-041A (us-cert.gov)third-party-advisory
- oval:org.mitre.oval:def:653 (oval.cisecurity.org)vdb-entrysignature
- 20040210 EEYE: Microsoft ASN.1 Library Length Overflow Heap Corruption (marc.info)mailing-list
- 20040210 EEYE: Microsoft ASN.1 Library Bit String Heap Corruption (marc.info)mailing-list
- oval:org.mitre.oval:def:799 (oval.cisecurity.org)vdb-entrysignature
- oval:org.mitre.oval:def:796 (oval.cisecurity.org)vdb-entrysignature
- VU#216324 (kb.cert.org)third-party-advisory
- MS04-007 (docs.microsoft.com)vendor-advisory
- 20040210 EEYE: Microsoft ASN.1 Library Bit String Heap Corruption (marc.info)mailing-list
- 20040210 EEYE: Microsoft ASN.1 Library Length Overflow Heap Corruption (marc.info)mailing-list
- oval:org.mitre.oval:def:797 (oval.cisecurity.org)vdb-entrysignature
Timeline
- ID reserved
- Record published
- Record last updated
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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:46 UTC. Sources and licenses