Executive brief
Netmaker, a platform used to manage virtual networks, contains a flaw that allows users to remotely shut down the central server. By repeatedly triggering this shutdown, an attacker can cause a continuous service outage, preventing legitimate users from accessing or managing their networks. This disruption can halt business operations that rely on these secure network connections.
Technical details
A denial of service vulnerability exists in Netmaker's API due to an improper resource shutdown mechanism (CWE-404). The '/api/server/shutdown' endpoint is accessible to users and, when called, triggers a 'syscall.SIGINT' to terminate the server process. While the server may automatically restart, an attacker can repeatedly call this endpoint to create a cyclic denial of service with roughly 3-second intervals of downtime. The vulnerability is present in versions prior to 1.2.0 and has been addressed in the 1.2.0 release.
Affected products
- Gravitl Netmaker < 1.2.0
Timeline
- 2026-03-04: advisory: GitHub Security Advisory published by vendor
- 2026-03-07: disclosed: CVE published to NVD
- 2026-03-07: patched: Fix released in version 1.2.0