# Re: \[PATCH\] capabilities: Ambient capability set V1

- From: Andy Lutomirski \<luto@amacapital.net\>
- Date: 2015-02-23 23:51:57 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2015/02/4436040
- Thread: https://ratatoskr.run/linux-api/2015/02/4426512/t.md

```text
On Feb 23, 2015 8:41 AM, "Christoph Lameter" [ref] wrote:
>
> On Mon, 23 Feb 2015, Andy Lutomirski wrote:
>
> > 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
```