Re: kdbus: credential faking

From	Casey Schaufler <casey@schaufler-ca.com>
Newsgroups	linux.kernel
Subject	Re: kdbus: credential faking
Date	2015-07-10 19:20 +0200
Message-ID	<pKK7V-mu-33@gated-at.bofh.it> (permalink)
References	(1 earlier) <pKsul-63C-5@gated-at.bofh.it> <pKGxj-6xX-1@gated-at.bofh.it> <pKGQG-6Gh-21@gated-at.bofh.it> <pKJ2a-8aV-25@gated-at.bofh.it> <pKJlv-8hr-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 7/10/2015 9:26 AM, David Herrmann wrote:
> Hi
>
> On Fri, Jul 10, 2015 at 5:59 PM, Casey Schaufler <casey@schaufler-ca.com> wrote:
> [...]
>>                There are so many ways uids are being (miss/ab)used
>> on Linux systems these days that the idea of trusting a bus just
>> because its non-root uid is listed in a table somewhere (or worse,
>> coded in an API) is asking for exploits.
> Please elaborate on these possible exploits. I'd also like to hear,
> whether the same applies to the already used '/run/user/<uid>/bus',
> which follows nearly the same model.

Sorry, I'm not the exploit generator guy. If I where, I would
point out that the application expecting the uid to identify
a person is going to behave incorrectly on the system that uses
the uid to identify an application. I never said that I liked
/run/user/<uid>/bus. Come to think of it, I never said I like
dbus, either.


>
> Thanks
> David
>

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Thread

Re: kdbus: credential faking David Herrmann <dh.herrmann@gmail.com> - 2015-07-10 18:30 +0200
  Re: kdbus: credential faking Casey Schaufler <casey@schaufler-ca.com> - 2015-07-10 19:20 +0200
    Re: kdbus: credential faking Richard Weinberger <richard.weinberger@gmail.com> - 2015-07-11 13:40 +0200

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