CVE-2005-1020

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.

• CWE-287

• http://secunia.com/advisories/14854Patch, Vendor Advisory
• http://www.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtmlVendor Advisory
• http://www.securityfocus.com/bid/13043
• http://www.securitytracker.com/alerts/2005/Apr/1013655.htmlVendor Advisory
• https://exchange.xforce.ibmcloud.com/vulnerabilities/19987
• https://exchange.xforce.ibmcloud.com/vulnerabilities/19989
• https://exchange.xforce.ibmcloud.com/vulnerabilities/19990
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5455
• http://secunia.com/advisories/14854Patch, Vendor Advisory
• http://www.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtmlVendor Advisory
• http://www.securityfocus.com/bid/13043
• http://www.securitytracker.com/alerts/2005/Apr/1013655.htmlVendor Advisory
• https://exchange.xforce.ibmcloud.com/vulnerabilities/19987
• https://exchange.xforce.ibmcloud.com/vulnerabilities/19989
• https://exchange.xforce.ibmcloud.com/vulnerabilities/19990
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5455

Published

May 2, 2005

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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