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