Cisco IOS XR through 4.3.2 on Gigabit Switch Router (GSR) 12000 devices does not properly check for a Bidirectional Forwarding Detection (BFD) header in a UDP packet, which allows remote attackers to cause a denial of service (line-card restart) via a crafted packet, aka Bug ID CSCuw56900.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ios_xr | Cisco | 3.3.3 (including) | 3.3.3 (including) |
| Ios_xr | Cisco | 3.4.1 (including) | 3.4.1 (including) |
| Ios_xr | Cisco | 3.4.2 (including) | 3.4.2 (including) |
| Ios_xr | Cisco | 3.4.3 (including) | 3.4.3 (including) |
| Ios_xr | Cisco | 3.5.2 (including) | 3.5.2 (including) |
| Ios_xr | Cisco | 3.5.3 (including) | 3.5.3 (including) |
| Ios_xr | Cisco | 3.5.4 (including) | 3.5.4 (including) |
| Ios_xr | Cisco | 3.6.0 (including) | 3.6.0 (including) |
| Ios_xr | Cisco | 3.6.1 (including) | 3.6.1 (including) |
| Ios_xr | Cisco | 3.6.2 (including) | 3.6.2 (including) |
| Ios_xr | Cisco | 3.6.3 (including) | 3.6.3 (including) |
| Ios_xr | Cisco | 3.7.0 (including) | 3.7.0 (including) |
| Ios_xr | Cisco | 3.7.1 (including) | 3.7.1 (including) |
| Ios_xr | Cisco | 3.8.0 (including) | 3.8.0 (including) |
| Ios_xr | Cisco | 3.8.1 (including) | 3.8.1 (including) |
| Ios_xr | Cisco | 3.8.2 (including) | 3.8.2 (including) |
| Ios_xr | Cisco | 3.8.4 (including) | 3.8.4 (including) |
| Ios_xr | Cisco | 3.9.0 (including) | 3.9.0 (including) |
| Ios_xr | Cisco | 3.9.1 (including) | 3.9.1 (including) |
| Ios_xr | Cisco | 3.9.2 (including) | 3.9.2 (including) |
| Ios_xr | Cisco | 4.0.0 (including) | 4.0.0 (including) |
| Ios_xr | Cisco | 4.0.1 (including) | 4.0.1 (including) |
| Ios_xr | Cisco | 4.0.3 (including) | 4.0.3 (including) |
| Ios_xr | Cisco | 4.1.0 (including) | 4.1.0 (including) |
| Ios_xr | Cisco | 4.1.1 (including) | 4.1.1 (including) |
| Ios_xr | Cisco | 4.1.2 (including) | 4.1.2 (including) |
| Ios_xr | Cisco | 4.2.0 (including) | 4.2.0 (including) |
| Ios_xr | Cisco | 4.2.1 (including) | 4.2.1 (including) |
| Ios_xr | Cisco | 4.2.2 (including) | 4.2.2 (including) |
| Ios_xr | Cisco | 4.2.3 (including) | 4.2.3 (including) |
| Ios_xr | Cisco | 4.2.4 (including) | 4.2.4 (including) |
| Ios_xr | Cisco | 4.3.0 (including) | 4.3.0 (including) |
| Ios_xr | Cisco | 4.3.1 (including) | 4.3.1 (including) |
| Ios_xr | Cisco | 4.3.2 (including) | 4.3.2 (including) |