A vulnerability in the access control logic of the Secure Shell (SSH) server of Cisco IOS and IOS XE Software may allow connections sourced from a virtual routing and forwarding (VRF) instance despite the absence of the vrf-also keyword in the access-class configuration. The vulnerability is due to a missing check in the SSH server. An attacker could use this vulnerability to open an SSH connection to an affected Cisco IOS or IOS XE device with a source address belonging to a VRF instance. Once connected, the attacker would still need to provide valid credentials to access the device.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ios | Cisco | 16.6.2 (including) | 16.6.2 (including) |
| Ios | Cisco | 16.6.4 (including) | 16.6.4 (including) |