What’s Vulnerable › Vulnerabilities

CVE-2003-0543

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 27.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2003-11-17 · updated 2026-06-16

Description

Integer overflow in OpenSSL 0.9.6 and 0.9.7 allows remote attackers to cause a denial of service (crash) via an SSL client certificate with certain ASN.1 tag values.

Affected products

• OpenSSL: 0.9.6, 0.9.7

References

• http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=104893
• http://secunia.com/advisories/22249
• http://sunsolve.sun.com/search/document.do?assetkey=1-66-201029-1
• http://www-1.ibm.com/support/docview.wss?uid=swg21247112
• http://www.cert.org/advisories/CA-2003-26.html
• http://www.debian.org/security/2003/dsa-393
• http://www.debian.org/security/2003/dsa-394
• http://www.kb.cert.org/vuls/id/255484
• http://www.linuxsecurity.com/advisories/engarde_advisory-3693.html
• http://www.redhat.com/support/errata/RHSA-2003-291.html
• http://www.redhat.com/support/errata/RHSA-2003-292.html
• http://www.securityfocus.com/bid/8732

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