FreeBSD: VID-6c9318c7-dae9-11f0-80b8-bc241121aa0a (CVE-2025-14558): FreeBSD -- Remote code execution via ND6 Router Advertisements

Problem Description: The rtsol(8) and rtsold(8) programs do not validate the domain search list options provided in router advertisement messages; the option body is passed to resolvconf(8) unmodified. resolvconf(8) is a shell script which does not validate its input. A lack of quoting meant that shell commands pass as input to resolvconf(8) may be executed. Impact: Systems running rtsol(8) or rtsold(8) are vulnerable to remote code execution from systems on the same network segment. In particular, router advertisement messages are not routable and should be dropped by routers, so the attack does not cross network boundaries.