Executive brief
HCL BigFix Service Management is a service management platform used by organizations to manage IT operations and deployments. The application incorrectly allows multiple simultaneous authenticated sessions for the same administrative account, enabling an attacker to predict or hijack valid session identifiers. Successful exploitation could allow an unauthorized attacker to impersonate an administrator and execute privileged actions across the platform.
Technical details
This vulnerability stems from insufficient session concurrency controls in HCL BigFix Service Management's administrative authentication mechanism. The application fails to enforce single-session limits for administrative accounts, allowing multiple authenticated sessions to exist simultaneously for the same user. This weakness enables attackers to predict or brute-force valid session identifiers without invalidating existing sessions. An attacker with network access to the application can exploit this to hijack an active administrative session and execute arbitrary privileged actions. No special authentication or user interaction is required beyond network reachability to the affected service.
Affected products
- HCL BigFix Service Management
Timeline
- 2026-09-18: disclosed