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security note CVE-2014-3295

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.
Severity of this threat: 2/4.
Creation date: 11/06/2014.
Références of this weakness: CSCup11309, CVE-2014-3295, VIGILANCE-VUL-14882.
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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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This threat announce impacts software or systems such as Nexus by Cisco, NX-OS.

Our Vigil@nce team determined that the severity of this cybersecurity alert is medium.

The trust level is of type confirmed by the editor, with an origin of intranet client.

An attacker with a expert ability can exploit this security alert.

Solutions for this threat

Cisco NX-OS: solution CSCup11309.
The solution CSCup11309 is available:
  https://tools.cisco.com/bugsearch/bug/CSCup11309
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