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    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.

    Published:Apr 9, 2005
    Last Modified:Apr 16, 2026
    EPS:Apr 9, 2005
    EPSS Score:0.0158
    CVSS Score:7.1

    Affected Products

    Vendor
    Cisco
    Product
    Ios

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

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    References

    http://secunia.com/advisories/14854
    http://www.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtml
    http://www.securityfocus.com/bid/13043
    http://www.securitytracker.com/alerts/2005/Apr/1013655.html
    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/14854
    http://www.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtml
    http://www.securityfocus.com/bid/13043
    http://www.securitytracker.com/alerts/2005/Apr/1013655.html
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High