{"id":"CVE-2005-1020","aliases":["EUVD-2005-1023","GHSA-v2x2-6pmp-ggmv"],"status":"published","title":"Secure Shell (SSH) 2 in Cisco IOS 12.0 through 12.3 allows remote attackers to cause a denial of...","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.","severity":{"version":"2.0","score":7.1,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01729,"percentile":0.7774,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2005-04-09T04:00:00Z","modified":"2026-06-16T22:12:17Z","products":[{"vendor":"cisco","product":"ios"}],"references":[{"url":"http://www.securitytracker.com/alerts/2005/Apr/1013655.html","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/13043","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/19987","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/19989","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://secunia.com/advisories/14854","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Patch","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/19990","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"http://www.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtml","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5455","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2005-1020"},{"url":"https://github.com/advisories/GHSA-v2x2-6pmp-ggmv"}],"sources":{"cve":[{"id":"CVE-2005-1020","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.","status":"published","published":"2005-04-09T04:00:00Z","modified":"2024-08-07T21:35:59.562Z","updated_at":"2026-11-02T14:33:39.586409Z"}],"euvd":[{"id":"EUVD-2005-1023","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.","status":"published","published":"2005-04-09T04:00:00Z","modified":"2024-08-07T21:35:59Z","updated_at":"2026-11-03T01:15:35.926327Z"}],"ghsa":[{"id":"GHSA-v2x2-6pmp-ggmv","title":"Secure Shell (SSH) 2 in Cisco IOS 12.0 through 12.3 allows remote attackers to cause a denial of...","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.","status":"published","published":"2022-05-01T01:54:23Z","modified":"2023-01-30T05:06:37Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:47:31.928606Z"}],"nvd":[{"id":"CVE-2005-1020","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.","status":"published","published":"2005-05-02T04:00:00Z","modified":"2026-06-16T22:12:17.27Z","cvss":[{"version":"2.0","score":7.1,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:00:54.933728Z"}]}}