A vulnerability in the way Cisco UCS Manager software handles SSH sessions could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper resource management for established SSH sessions. An attacker could exploit this vulnerability by opening a significant number of SSH sessions on an affected device. A successful exploit could allow the attacker to cause a crash and restart of internal Cisco UCS Manager software processes and a temporary loss of access to the Cisco UCS Manager CLI and web UI. Note: The attacker must have valid user credentials to authenticate to the affected device.
The product does not maintain or incorrectly maintains control over a resource throughout its lifetime of creation, use, and release.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Unified_computing_system | Cisco | 4.0 (including) | 4.0(4m) (excluding) |
| Unified_computing_system | Cisco | 4.1 (including) | 4.1(3e) (excluding) |
Resources often have explicit instructions on how to be created, used and destroyed. When code does not follow these instructions, it can lead to unexpected behaviors and potentially exploitable states. Even without explicit instructions, various principles are expected to be adhered to, such as “Do not use an object until after its creation is complete,” or “do not use an object after it has been slated for destruction.”