Command Injection in Cisco IMC Web-Based Management Interface

Successful exploitation allows an authenticated remote attacker with administrative privileges on the IMC interface to execute arbitrary operating system commands as root on the affected device. Because execution occurs with root privileges on the underlying OS of the management controller environment, this can lead to full compromise of the affected system, including complete administrative control, modification of system state, deployment of additional payloads, and follow-on actions with elevated privileges.

No specific workaround is available according to the provided content. As a defensive measure, the IMC web management interface should not be exposed to the public internet and should instead be isolated in a dedicated management network with strong segmentation and access controls. Restrict access to trusted administrative hosts and users only, minimize the number of accounts with admin-level privileges, and monitor access to out-of-band management interfaces closely until patches are applied.

Cisco has released security updates to address this vulnerability. The provided content states that workarounds are not available for these IMC vulnerabilities, so affected organizations should upgrade to Cisco-fixed releases as quickly as possible. Where applicable, Cisco recommends upgrading affected NFVIS-based platforms to fixed versions, including NFVIS 4.15.5 or later for 5000 Series ENCS running NFVIS 4.15 and earlier, and NFVIS 4.18.3 or later for Catalyst 8300 Series Edge uCPE running NFVIS 4.18, with older NFVIS 4.16 and earlier migrated to a fixed release. Administrators should also follow Cisco’s product-specific fixed-version guidance for affected UCS and appliance deployments.