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CVE-2005-1020

7.1 · HIGH

Secure Shell (SSH) 2 in Cisco IOS 12.0 through 12.3 allows remote attackers to cause a denial of service (device reload) (1) via a username that contains a domain name when using a TACACS+ server t…

Published May 2, 2005ciscoCWE-287EPSS 1.73%

Overview

CVE-2005-1020 is a high-severity vulnerability affecting cisco ios. It was published on May 2, 2005 and has a CVSS 2.0 base score of 7.1 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Secure Shell (SSH) 2 in Cisco IOS 12.0 through 12.3 allows remote attackers to cause a denial of service (device reload) (1) via a username that contains a domain name when using a TACACS+ server to authenticate, (2) when a new SSH session is in the login phase and a currently logged in user issues a send command, or (3) when IOS is logging messages and an SSH session is terminated while the server is sending data.

Remediation

Check the references section for vendor advisories and patches from cisco. Update ios 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

Refsecunia.com/advisories/14854Refwww.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtmlRefwww.securityfocus.com/bid/13043Refwww.securitytracker.com/alerts/2005/Apr/1013655.htmlRefexchange.xforce.ibmcloud.com/vulnerabilities/19987Refexchange.xforce.ibmcloud.com/vulnerabilities/19989Refexchange.xforce.ibmcloud.com/vulnerabilities/19990Refoval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5455Refsecunia.com/advisories/14854Refwww.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtml

How CyberStrike helps

Frequently asked questions

What is CVE-2005-1020?

CVE-2005-1020 is a high-severity vulnerability affecting cisco ios. It was published on May 2, 2005 and has a CVSS 2.0 base score of 7.1 (HIGH).

How severe is CVE-2005-1020?

This vulnerability has a CVSS 2.0 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2005-1020?

Check the references section for vendor advisories and patches from cisco. Update ios 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-2005-1020?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2005-1020 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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