Path traversal in the certificate.deleteCertificate JSON-RPC method (POST /api/rpc) of the turbineweb web interface in Zenitel VSFF6, VSFF8, VSFF8MP, VSFF8MN, and VSFT devices with software versions from 10.0.3.0 before 10.1.3.0 allows authenticated administrators to delete arbitrary files as root via a relative path (../) in the filename parameter.

This can be used to cause denial of service or render the device inoperable by removing critical system files, and to weaken device security by removing files such as firewall rules or certificate trust stores.

Path traversal in the certificate upload endpoint (/api/certificate/upload) of the turbineweb web interface in Zenitel VSFF6, VSFF8, VSFF8MP, VSFF8MN, and VSFT devices with software versions from 10.0.3.0 before 10.1.3.0 allows authenticated administrators to write arbitrary files as root via a crafted filename parameter in a multipart upload request when the type field is set to any value other than httpscertificate. In that case, both path validation and certificate content validation are skipped.

This can be escalated to arbitrary code execution as root, for example by overwriting startup scripts or planting SSH keys.