CVE-2005-1021

Severity: high (CVSS 7.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2005-05-02 · updated 2026-06-16
Weakness: CWE-399

Description

Memory leak in Secure Shell (SSH) in Cisco IOS 12.0 through 12.3, when authenticating against a TACACS+ server, allows remote attackers to cause a denial of service (memory consumption) via an incorrect username or password.

Affected products

Cisco IOS: 12.0s, 12.0sx, 12.1ax, 12.1az, 12.1db, 12.1dc (+87)

References

http://secunia.com/advisories/14854
http://www.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtml
http://www.osvdb.org/15303
http://www.securityfocus.com/bid/13042
http://www.securitytracker.com/alerts/2005/Apr/1013655.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/19991
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5687
http://secunia.com/advisories/14854
http://www.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtml
http://www.osvdb.org/15303
http://www.securityfocus.com/bid/13042
http://www.securitytracker.com/alerts/2005/Apr/1013655.html

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