A logic error in Cisco IOS 12.0 through 12.4, when a Multiprotocol Label Switching (MPLS) VPN with extended communities is configured, sometimes causes a corrupted route target (RT) to be used, which allows remote attackers to read traffic from other VPNs in opportunistic circumstances.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ios | Cisco | 12.0s (including) | 12.0s (including) |
| Ios | Cisco | 12.0sx (including) | 12.0sx (including) |
| Ios | Cisco | 12.0sz (including) | 12.0sz (including) |