CVE Catalog

CVE-2005-4436

High
Published: Translated: NVD NIST

Summary

A vulnerability in the EIGRP implementation in Cisco IOS after versions 12.3(2), 12.3(3)B, and 12.3(2)T and other products allows a remote attacker to cause a denial of service (DoS) by sending a spoofed neighbor announcement with mismatched k values or a goodbye message TLV.

Risk Assessment

The attack can disrupt network operations by destabilizing EIGRP routing, leading to service unavailability for users and potential financial losses.

Recommendation

It is recommended to upgrade Cisco IOS to a patched version or apply access control lists (ACLs) to restrict EIGRP traffic to trusted sources.

Related vulnerabilities

Original NVD description (English source)

Extended Interior Gateway Routing Protocol (EIGRP) 1.2, as implemented in Cisco IOS after 12.3(2), 12.3(3)B, and 12.3(2)T and other products, allows remote attackers to cause a denial of service by sending a "spoofed neighbor announcement" with (1) mismatched k values or (2) "goodbye message" Type-Length-Value (TLV).

Vulnerability data from NVD (NIST) · CISA KEV · EPSS