Cisco IOS XR 4.3(.2) and earlier on ASR 9000 devices does not properly perform NetFlow sampling of IP packets, which allows remote attackers to cause a denial of service (chip and card hangs) via malformed (1) IPv4 or (2) IPv6 packets, aka Bug ID CSCuo68417.
| Software | From | Fixed in |
|---|---|---|
| cisco / ios_xr | - | 4.3.2.x |
| cisco / ios_xr | 4.3.0 | 4.3.0.x |
| cisco / ios_xr | 4.3.1 | 4.3.1.x |