CVE-2012-4436: Cipherdyne Fwknop

Medium severity, CVSS 4.4. EPSS: 0.7% chance of exploitation in the next 30 days.

Buffer overflow in the run_last_args function in client/fwknop.c in fwknop before 2.0.3, when processing --last, might allow local users to cause a denial of service (client crash) and possibly execute arbitrary code via many .fwknop.run arguments.

Affected products

• Cipherdyne Fwknop: up to and including 2.0.2; version 2.0 only; version 2.0.1 only

Published 2012-10-22. Last modified 2026-06-16.