CVE-2024-42001 Vonets CVE debrief

Who should care

Organizations deploying Vonets VAR1200-H, VAR1200-L, VAR600-H, VAP11AC, VAP11G-500S, VBG1200, VAP11S-5G, VAP11S, VAR11N-300, VAP11G-300, VAP11N-300, VAP11G, VAP11G-500, or VGA-1000 WiFi bridges in industrial, enterprise, or operational technology environments. Security teams responsible for wireless infrastructure, network administrators managing remote site connectivity, and OT security practitioners with bridge deployments should prioritize assessment. Organizations with regulatory requirements for authentication controls in industrial networks face compliance exposure. Users relying on these devices for critical infrastructure connectivity require immediate risk evaluation given the unpatched status and vendor non-response.

Technical summary

The vulnerability stems from improper authentication validation in Vonets WiFi Bridge firmware. When a legitimate user maintains an active administrative session, an unauthenticated remote attacker can bypass authentication checks by sending a specially crafted direct request to the device. This request appears to exploit insufficient session isolation or authentication state validation, allowing the attacker to gain unauthorized access without presenting valid credentials. The attack requires network accessibility to the device management interface but no user interaction or prior privileges. Successful exploitation grants attacker capabilities with low confidentiality and integrity impact but high availability impact, suggesting potential for configuration changes or service disruption.

Defensive priority

HIGH

Recommended defensive actions

• Contact Vonets support at the provided email address to request security patches or mitigation guidance for affected devices
• Segment affected Vonets devices from untrusted networks and restrict administrative access to dedicated management VLANs
• Monitor for unauthorized administrative sessions on affected devices, particularly when legitimate users are actively connected
• Implement network access controls to limit direct requests to device management interfaces from unauthorized sources
• Consider replacing affected devices with alternatives from vendors providing active security support if patches are not forthcoming
• Apply CISA ICS recommended practices for network segmentation and defense-in-depth for industrial control systems
• Review and strengthen session management controls on any interim deployments of affected devices

Evidence notes

CISA CSAF advisory ICSA-24-214-08 documents authentication bypass via crafted direct request during active user session. CVSS 3.1 vector: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H. Affected versions confirmed as 3.3.23.6.9 and prior across 16 product entries covering 14 distinct models.

Official resources