CVE-2018-25241 VPNBrowser CVE debrief

Who should care

Users of VPN Browser+ 1.1.0.0, security teams, and operators should verify their exposure and apply vendor remediation if available. The vulnerability allows unauthenticated attackers to crash the application, which can have significant operational impact. Affected operators and platforms should prioritize remediation and review compensating controls.

Technical summary

CVE-2018-25241 is a denial of service vulnerability in VPN Browser+ 1.1.0.0. The vulnerability allows unauthenticated attackers to crash the application by submitting oversized input through the search functionality. This can be achieved by pasting a large buffer of characters into the search bar, triggering an unhandled exception that terminates the application. Users of VPN Browser+ 1.1.0.0 should verify their exposure and apply vendor remediation if available.

Defensive priority

Apply vendor remediation if available. Monitor for oversized input attempts and review compensating controls for exposed systems.

Recommended defensive actions

• Verify affected scope and apply vendor remediation if available
• Monitor for oversized input attempts
• Perform inventory checks for VPN Browser+ 1.1.0.0
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Evidence is limited; verify affected scope and vendor remediation. Primary official records indicate a denial of service vulnerability in VPN Browser+ 1.1.0.0. The vulnerability allows unauthenticated attackers to crash the application by submitting oversized input through the search functionality. Verify affected scope, vendor remediation status, and apply defensive measures as necessary. Limited evidence suggests that the vulnerability can be triggered by pasting a large buffer of characters into the search bar.

Official resources