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.
CVSS Severity (version 2.0):
Impact Subscore: 6.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service
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.'
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20120530 Cisco IOS XR Software Route Processor Denial of Service Vulnerability