Cisco Vision Dynamic Signage Director REST API Authenticatie Omzeilings Vulnerabiliteit

The impact of CVE-2019-1917 is severe. A successful exploit allows an attacker to execute arbitrary actions with administrative privileges on the affected Cisco Vision Dynamic Signage Director system. This could include modifying system configurations, accessing sensitive data, or even taking complete control of the device. Given the administrative privileges granted, an attacker could potentially pivot to other systems on the network, leading to a broader compromise. The REST API is enabled by default, increasing the attack surface and making exploitation easier.

Organizations utilizing Cisco Vision Dynamic Signage Director for digital signage deployments are at risk, particularly those running versions prior to 6.1sp3. Environments with exposed REST APIs or lacking robust network segmentation are especially vulnerable. Shared hosting environments where multiple tenants share the same infrastructure could also be impacted if the Director is deployed in a multi-tenant configuration.

• cisco: Use Cisco's security advisory to identify affected devices. Check system version using CLI: show version. Monitor REST API logs for unusual authentication attempts or unauthorized access. • generic web: Monitor access logs for requests to the REST API endpoints without proper authentication headers. Use curl to test authentication bypass attempts: curl -v -X GET <director_ip>/api/v1/system/status (expecting a 200 OK without authentication). • linux / server: Monitor system logs for unusual activity related to the Cisco Vision Dynamic Signage Director process. Use journalctl -u vision-director to review logs.

1. 2019-07-17Disclosure

   disclosure

2. 2019-07-17Patch

   patch

1. Gereserveerd2018-12-06
2. Gepubliceerd2019-07-17
3. Gewijzigd2024-11-19
4. EPSS bijgewerkt2026-04-02

The primary mitigation for CVE-2019-1917 is to upgrade Cisco Vision Dynamic Signage Director to version 6.1sp3 or later. If immediate upgrade is not possible, consider implementing strict network segmentation to isolate the affected system. Review and restrict access to the REST API, limiting it to trusted sources. Monitor REST API traffic for suspicious activity. While no specific WAF rules are provided, generic rules to block unauthorized access attempts to the REST API endpoints could offer some protection. After upgrade, confirm functionality by verifying administrative access and ensuring the REST API operates as expected.