Vigil@nce - Cisco IOS XR: denial of service via telnetd
August 2015 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can send a malicious telnetd packet to Cisco IOS XR,
in order to trigger a denial of service.
Impacted products: Cisco ASR, IOS XR Cisco.
Severity: 2/4.
Creation date: 11/06/2015.
DESCRIPTION OF THE VULNERABILITY
The Cisco IOS XR product has a service to manage received telnetd
packets. This service uis used for administration purpose.
However, when a malicious packet is received, a fatal error occurs
and the server restarts.
An attacker can therefore send a malicious telnetd packet to Cisco
IOS XR, in order to trigger a denial of service.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
http://vigilance.fr/vulnerability/Cisco-IOS-XR-denial-of-service-via-telnetd-17110