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SubjectRe: [RFC PATCH v1 0/5] Add support for O_MAYEXEC
On Wed, 12 Dec 2018, Florian Weimer wrote:

> * James Morris:
>
> > If you're depending on the script interpreter to flag that the user may
> > execute code, this seems to be equivalent in security terms to depending
> > on the user. e.g. what if the user uses ptrace and clears O_MAYEXEC?
>
> The argument I've heard is this: Using ptrace (and adding the +x
> attribute) are auditable events.

I guess you could also preload a modified libc which strips the flag.


--
James Morris
<jmorris@namei.org>

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