What’s Vulnerable › Vulnerabilities

CVE-2004-1111

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2005-01-10 · updated 2026-06-16

Description

Cisco IOS 2.2(18)EW, 12.2(18)EWA, 12.2(14)SZ, 12.2(18)S, 12.2(18)SE, 12.2(18)SV, 12.2(18)SW, and other versions without the "no service dhcp" command, keep undeliverable DHCP packets in the queue instead of dropping them, which allows remote attackers to cause a denial of service (dropped traffic) via multiple undeliverable DHCP packets that exceed the input queue size.

Affected products

• Cisco 7200 Router: all versions
• Cisco 7300 Router: all versions
• Cisco 7500 Router: all versions
• Cisco 7600 Router: all versions
• Cisco Catalyst 7600: all versions
• Cisco IOS: 12.2(14)sz, 12.2(18)ew, 12.2(18)ewa, 12.2(18)s, 12.2(18)se, 12.2(18)sv (+2)
• Cisco Multiservice Platform 2650: all versions
• Cisco Multiservice Platform 2650Xm: all versions
• Cisco Multiservice Platform 2651: all versions
• Cisco Multiservice Platform 2651Xm: all versions

References

• http://www.ciac.org/ciac/bulletins/p-034.shtml
• http://www.cisco.com/warp/public/707/cisco-sa-20041110-dhcp.shtml
• http://www.kb.cert.org/vuls/id/630104
• http://www.us-cert.gov/cas/techalerts/TA04-316A.html
• https://exchange.xforce.ibmcloud.com/vulnerabilities/18021
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5632
• http://www.ciac.org/ciac/bulletins/p-034.shtml
• http://www.cisco.com/warp/public/707/cisco-sa-20041110-dhcp.shtml
• http://www.kb.cert.org/vuls/id/630104
• http://www.us-cert.gov/cas/techalerts/TA04-316A.html
• https://exchange.xforce.ibmcloud.com/vulnerabilities/18021
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5632

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