The SSH implementation in Cisco StarOS before 19.3.M0.62771 and 20.x before 20.0.M0.62768 on ASR 5000 devices mishandles a multi-user public-key authentication configuration, which allows remote authenticated users to gain privileges by establishing a connection from an endpoint that was previously used for an administrators connection, aka Bug ID CSCux22492.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Asr_5000_series_software | Cisco | 16.5.2 (including) | 16.5.2 (including) |
| Asr_5000_series_software | Cisco | 17.7.0 (including) | 17.7.0 (including) |
| Asr_5000_series_software | Cisco | 18.4.0 (including) | 18.4.0 (including) |
| Asr_5000_series_software | Cisco | 19.0.1 (including) | 19.0.1 (including) |
| Asr_5000_series_software | Cisco | 19.3.0 (including) | 19.3.0 (including) |
| Asr_5000_series_software | Cisco | 20.0.0 (including) | 20.0.0 (including) |