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Vigil@nce - Cisco IP Phone 8851: denial of service via SIP CANCEL

July 2017 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can send malicious SIP CANCEL packets to Cisco IP
Phone 8851, in order to trigger a denial of service.

Impacted products: Cisco IP Phone.

Severity: 2/4.

Creation date: 18/05/2017.

DESCRIPTION OF THE VULNERABILITY

The Cisco IP Phone 8851 product has a service to manage received
SIP CANCEL packets.

However, when malicious SIP CANCEL packets are received, a fatal
error occurs.

An attacker can therefore send malicious SIP CANCEL packets to
Cisco IP Phone 8851, in order to trigger a denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Cisco-IP-Phone-8851-denial-of-service-via-SIP-CANCEL-22760


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