What happened
An identified vulnerability has been reported in the REST API of Cisco ISE. This flaw allows an authenticated, remote attacker with administrative privileges to upload or copy arbitrary files on an affected device. The vulnerability stems from insufficient validation during file operations, enabling the attacker to craft file paths that lead to arbitrary file placement and execution of commands with root privileges. Exploiting this vulnerability requires the attacker to have valid administrative credentials, but it does not necessitate any user interaction beyond authentication. The attack can be executed remotely over the network via an exposed service, with no additional action required from users or administrators.
Who is affected
Organisations running Cisco ISE deployments that are accessible over the network are potentially affected. Given the nature of the vulnerability, any affected deployment exposed to external or internal networks with administrative access credentials may be at risk. The severity of the impact underscores the importance of evaluating exposure levels and access controls on the affected services.
Recommended actions
- Restrict network access to the affected service. Implement network segmentation and access controls to limit exposure to trusted sources only.
- Review and reinforce administrative account security. Ensure that credentials are strong, and consider rotating administrative passwords.
- Monitor network traffic for unusual activities that may indicate exploitation attempts, particularly targeting the REST API endpoint of Cisco ISE.
- Maintain vigilance for updates or patches from Cisco, as no patch is currently available. Stay informed on the progress of vulnerability mitigation efforts.
Indicators of compromise
At present, specific indicators of compromise have not been provided. Monitoring should focus on suspicious activities related to file uploads or command executions on the affected Cisco ISE devices, particularly around the REST API endpoints and related administrative interfaces.
