Theo de Raadt wrote: > One of these days someone is going to use the magic of a system call > interposition mechanism such systrace; and for their application > accidentally create an operating system behaviour that is un-POSIX, > and some application is going to misbehave as a result of that change > and inadvertantly this will result in the CREATION of a hole. For a concrete example regarding POSIX 1e capabilities (which are essentially a "system call interposition mechanism"): http://ciac.llnl.gov/ciac/bulletins/k-064.shtml Summary: If a root process doesn't have CAP_SETUID, attempts to give up root privilege fail, resulting in the process continuing to run as root. -- Glynn Clements <glynn.clements@virgin.net>
