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Vulnerability record · CVE-2003-0851 · published 1 December 2003

CVE-2003-0851: Cisco ios vulnerability

Cisco · Ios

OpenSSL 0.9.6k allows remote attackers to cause a denial of service (crash via large recursion) via malformed ASN.1 sequences.

5.0 CVSS 2.0 Medium EPSS 6.1% · top 6.9%
5.0CVSS 2.0 base score
6.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
24References
16 Jun 2026Last modified by NVD

Description

OpenSSL 0.9.6k allows remote attackers to cause a denial of service (crash via large recursion) via malformed ASN.1 sequences.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2004-003.txt.asc
ftp://patches.sgi.com/support/free/security/advisories/20040304-01-U.asc
http://marc.info/?l=bugtraq&m=106796246511667&w=2
http://marc.info/?l=bugtraq&m=108403850228012&w=2
http://rhn.redhat.com/errata/RHSA-2004-119.html
http://secunia.com/advisories/17381
http://www.cisco.com/warp/public/707/cisco-sa-20030930-ssl.shtml
http://www.kb.cert.org/vuls/id/412478 PatchThird Party AdvisoryUS Government Resource
http://www.openssl.org/news/secadv_20031104.txt PatchVendor Advisory
http://www.redhat.com/archives/fedora-announce-list/2005-October/msg00087.html
http://www.securityfocus.com/bid/8970 PatchVendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5528
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2004-003.txt.asc
ftp://patches.sgi.com/support/free/security/advisories/20040304-01-U.asc
http://marc.info/?l=bugtraq&m=106796246511667&w=2
http://marc.info/?l=bugtraq&m=108403850228012&w=2
http://rhn.redhat.com/errata/RHSA-2004-119.html
http://secunia.com/advisories/17381
http://www.cisco.com/warp/public/707/cisco-sa-20030930-ssl.shtml
http://www.kb.cert.org/vuls/id/412478 PatchThird Party AdvisoryUS Government Resource
http://www.openssl.org/news/secadv_20031104.txt PatchVendor Advisory
http://www.redhat.com/archives/fedora-announce-list/2005-October/msg00087.html
http://www.securityfocus.com/bid/8970 PatchVendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5528

Track CVE-2003-0851 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2003-0851), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.