CVE-2003-0545

CRITICALNVD 9.89.8—Elevated

9.8

Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via an SSL client certificate with a certain invalid ASN.1 encoding.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 98.9%
KEV: Not listed

Published

November 17, 2003

Last Modified

April 16, 2026

Advisory Details (6)

Auto-updated May 1, 2026

No patch confirmed yet. Sources: cert.

generic

VUPEN Security - Vulnerability Research and Intelligence

http://www.vupen.com/english/advisories/2006/3900

generic

http://www.securityfocus.com/bid/8732

generic

Support

http://www.redhat.com/support/errata/RHSA-2003-292.html

cert

VU#935264 - OpenSSL ASN.1 parser insecure memory deallocation

http://www.kb.cert.org/vuls/id/935264

generic

Debian -- The Universal Operating System

http://www.debian.org/security/2003/dsa-394

generic

About Secunia Research | Flexera

http://secunia.com/advisories/22249

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	patch	2003-09-30	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Data Freshness Timeline

(refreshed 8× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-20 07:36 UTCEG score recompute
2026-05-20 07:36 UTCVendor advisory
2026-05-20 07:36 UTCGHSA enrichment
2026-05-20 03:12 UTCEG score recompute
2026-05-20 03:12 UTCVendor advisory
2026-05-20 03:12 UTCGHSA enrichment
2026-05-19 23:10 UTCEG score recompute
2026-05-19 23:10 UTCVendor advisory
2026-05-19 23:10 UTCGHSA enrichment
2026-05-19 19:09 UTCEG score recompute
2026-05-19 19:09 UTCVendor advisory
2026-05-19 19:09 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2003-0545?

CVE-2003-0545 is a critical vulnerability published on November 17, 2003. Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via an SSL client certificate with a certain invalid ASN.1 encoding.

When was CVE-2003-0545 disclosed?

CVE-2003-0545 was first published in the National Vulnerability Database on November 17, 2003, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2003-0545 actively exploited?

CVE-2003-0545 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2003-0545?

CVE-2003-0545 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2003-0545?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2003-0545, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2003-0545

📅 Published

🔄 Last Modified

📋 Advisory Details (6)

VUPEN Security - Vulnerability Research and Intelligence

Support

VU#935264 - OpenSSL ASN.1 parser insecure memory deallocation

Debian -- The Universal Operating System

About Secunia Research | Flexera

Patch Availability(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2003-0545?

🔗 Related CVEs(same vendor)

Same vendor

Published

Last Modified

Advisory Details (6)

Frequently asked(5)

Related CVEs(same vendor)