SyncBreeze 10.0.28 is susceptible to a remote denial of service attack that can crash the application service, potentially disrupting critical operations.

The application fails to properly limit or throttle resources during the login process, specifically within the login endpoint. An unauthenticated remote attacker can exploit this by sending a specially crafted, oversized payload to the application, resulting in a service crash.

Successful exploitation of this vulnerability results in a denial of service, which can cause significant disruption to business continuity. Because the service becomes unavailable until manually restarted, the organization may face downtime for dependent automated file synchronization tasks. Given the CVSS score of 7.5, this high-severity flaw poses a notable risk to system availability and reliability.

Immediate Action: As no official patch is currently identified, administrators should restrict network access to the SyncBreeze management interface to trusted IP addresses only.

Proactive Monitoring: Monitor system logs for repeated login attempts or unusual traffic patterns directed at the login endpoint that coincide with service instability.

Compensating Controls: Deploy a Web Application Firewall (WAF) with rules configured to inspect and block requests containing abnormally large payloads in the login parameters.

Public Exploit Available: Yes, a proof-of-concept exploit is available via the Exploit Database (EDB-ID: 49291).

The presence of a public proof-of-concept combined with the ease of triggering a service crash necessitates immediate defensive action. Organizations relying on SyncBreeze should prioritize isolating the affected service from public-facing networks and implement strict access controls to prevent unauthorized interaction with the vulnerable login endpoint.