Cisco IOS XR before 4.2.1 on ASR 9000 series devices and CRS series devices allows remote attackers to cause a denial of service (packet transmission outage) via a crafted packet, aka Bug IDs CSCty94537 and CSCtz62593. Per: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120530-iosxr
'Affected Products
This vulnerability affects IOS XR Software version 4.2.0 running on the Cisco ASR 9000 Series RSP440. It also affects IOS XR Software versions 4.0.3, 4.0.4, 4.1.0, 4.1.1, 4.1.2, and 4.2.0 running on the CRS Performance Route Processor.'
Publication date: Thu, 31 May 2012 15:17:00 +0000