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Cisco NX-OS: denial of service via HSRP Authentication
Synthesis of the vulnerability
An attacker can send HSRP packets to Cisco NX-OS, in order to trigger a denial of service.
Vulnerable systems: Nexus by Cisco, NX-OS.
Severity of this threat: 2/4.
Consequences of a hack: denial of service on service.
Pirate's origin: intranet client.
Creation date: 11/06/2014.
Références of this weakness: CSCup11309, CVE-2014-3295, VIGILANCE-VUL-14882.
Description of the vulnerability
The HSRP (Hot Standby Router Protocol) protocol is used to reconfigure the priority of routing.
However, an attacker can send malformed HSRP packets, to bypass the authentication, and alter the HSRP state.
An attacker can therefore send HSRP packets to Cisco NX-OS, in order to trigger a denial of service.
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