On Feb 23, 2015 8:41 AM, "Christoph Lameter" [off-list ref] wrote:
On Mon, 23 Feb 2015, Andy Lutomirski wrote:
quoted
If you set ambient caps and then run a setuid program (without
no_new_privs), then the ambient set *must* be cleared by the kernel
because that's what the setuid program expects. Yes, the whole
Why would a setuid program expect that? I'd say we expect the ambient set
to remain in effect. What would break if the ambient set would stay
active?
On a total guess: exim, sendmail, sudo, Apache suexec, etc. Basically
anything that expects setresuid(nonzero values); execve to drop caps.
I haven't checked how many of the examples above actually do this.
--Andy