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CVE-2004-0551

5.0 · MEDIUM

Cisco CatOS 5.x before 5.5(20) through 8.x before 8.2(2) and 8.3(2)GLX, as used in Catalyst switches, allows remote attackers to cause a denial of service (system crash and reload) by sending inval…

Published Aug 6, 2004ciscoEPSS 3.13%

Overview

CVE-2004-0551 is a medium-severity vulnerability affecting cisco catos. It was published on August 6, 2004 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Cisco CatOS 5.x before 5.5(20) through 8.x before 8.2(2) and 8.3(2)GLX, as used in Catalyst switches, allows remote attackers to cause a denial of service (system crash and reload) by sending invalid packets instead of the final ACK portion of the three-way handshake to the (1) Telnet, (2) HTTP, or (3) SSH services, aka "TCP-ACK DoS attack."

Remediation

Check the references section for vendor advisories and patches from cisco. Update catos to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refwww.cisco.com/warp/public/707/cisco-sa-20040609-catos.shtmlRefwww.kb.cert.org/vuls/id/245190Refexchange.xforce.ibmcloud.com/vulnerabilities/16370Refwww.cisco.com/warp/public/707/cisco-sa-20040609-catos.shtmlRefwww.kb.cert.org/vuls/id/245190Refexchange.xforce.ibmcloud.com/vulnerabilities/16370

How CyberStrike helps

Frequently asked questions

What is CVE-2004-0551?

CVE-2004-0551 is a medium-severity vulnerability affecting cisco catos. It was published on August 6, 2004 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2004-0551?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2004-0551?

Check the references section for vendor advisories and patches from cisco. Update catos to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2004-0551?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2004-0551 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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