Cisco IOS XR Packet Processing Flaw Lets Remote Users Deny Service on Certain Devices
SecurityTracker Alert ID: 1027104|
SecurityTracker URL: http://securitytracker.com/id/1027104
(Links to External Site)
Date: May 30 2012
Denial of service via network|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): XR 4.0.3, 4.0.4, 4.1.0, 4.1.1, 4.1.2, and 4.2.0|
A vulnerability was reported in Cisco IOS XR. A remote user can cause denial of service conditions.|
A remote user can send a specially crafted packet to the target device to cause the route processor to be unable to transmit route processor-based protocol packets to the fabric.
IP traffic transiting the device cannot trigger the flaw.
Cisco IOS XR is affected on the Cisco 9000 Series Aggregation Services Routers (ASR) Route Switch Processor (RSP440) and the Cisco Carrier Routing System (CRS) Performance Route Processor (PRP).
Cisco has assigned Cisco Bug IDs CSCty94537 (ASR 9000) and CSCtz62593 (CRS) to this vulnerability.
A remote user can cause the route processor to be unable to transmit packets.|
The vendor has issued a fix.|
The vendor's advisory is available at:
Vendor URL: tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120530-iosxr (Links to External Site)
Source Message Contents
Subject: Cisco Security Advisory: Cisco IOS XR Software Route Processor Denial of Service Vulnerability|
-----BEGIN PGP SIGNED MESSAGE-----
Cisco IOS XR Software Route Processor Denial of Service Vulnerability
Advisory ID: cisco-sa-20120530-iosxr
For Public Release 2012 May 30 16:00 UTC (GMT)
Cisco IOS XR Software contains a vulnerability when handling crafted
packets that may result in a denial of service condition. The
vulnerability only exists on Cisco 9000 Series Aggregation Services
Routers (ASR) Route Switch Processor (RSP440) and Cisco Carrier
Routing System (CRS) Performance Route Processor (PRP). The
vulnerability is a result of improper handling of crafted packets and
could cause the route processor, which processes the packets, to be
unable to transmit packets to the fabric.
Cisco has released free software updates that address this
vulnerability. This advisory is available at the following link:
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