Horizon Alert
Summary of the vulnerability and why it matters
This advisory addresses a critical vulnerability in Roxy-WI, a web interface used to manage critical server infrastructure like Haproxy and Nginx. The flaw allows authenticated users to silently alter monitoring configurations for other tenants, potentially disrupting service availability or leading to unauthorized changes. While a patch is not yet available, understanding the nature of this threat is important for assessing potential impact.
- Unauthenticated users can change monitoring settings.
- It impacts critical server management interfaces.
- Confirm relevance and exposure to affected systems.
Attack Path
How an attacker could exploit the issue
An authenticated user of Roxy-WI can manipulate monitoring checks for other tenants. The vulnerability lies in how the application handles updates to monitoring configurations, specifically allowing any authenticated user to modify any monitoring check regardless of their assigned tenant. This could lead to the unauthorized alteration of critical monitoring settings.
- Authenticated user access is required.
- PUT request to `/smon/check` can be abused.
- Unauthorized modification of monitoring checks.
Live Threat
Current exploitation, exposure, and threat context
An authenticated user could alter monitoring checks configured by other users. This could impact the reliability of services managed by Roxy-WI by silently disabling or modifying their monitoring.
- Monitoring check configurations.
- By overwriting other user's checks.
- Service monitoring reliability may degrade.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
Understanding ownership and initial steps for this vulnerability requires identifying the team responsible for the Roxy-WI application and its underlying infrastructure. The first practical move is to determine where Roxy-WI is deployed, assess its network exposure and business criticality, and identify the accountable owner before planning remediation.
- Application owners and infrastructure teams should own.
- Verify Roxy-WI deployment and network exposure.
- Plan remediation based on identified risks.
