Race condition vulnerability in Cisco IOS 15.3S allows remote attackers to cause denial of service in UBR devices.

Race condition vulnerability in Cisco IOS 15.3S allows remote attackers to cause denial of service in UBR devices.

CVE-2015-4199 · HIGH Severity

AV:N/AC:M/AU:N/C:N/I:N/A:C

Race condition in the IPv6-to-IPv4 functionality in Cisco IOS 15.3S in the Performance Routing Engine (PRE) module on UBR devices allows remote attackers to cause a denial of service (NULL pointer free and module crash) by triggering intermittent connectivity with many IPv6 CPE devices, aka Bug ID CSCug47366.

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