Re: Minor security flaw with pam_xauth

[Josh Bressers <bressers () redhat com>]

----- "Josh Bressers" <bressers () redhat com> wrote:
> > The same commit also introduces previously-missing privilege switching
> > into pam_env and pam_mail.  Unfortunately, this pam_env and pam_mail
> > fix is incomplete: it only switches the fsuid (should also switch fsgid
> > (or egid) and groups), and it fails to check the return value from
> > setfsuid() (doing so would require duplicate calls to setfsuid(), like
> > we do in libtcb, or switching of euid instead - yet it is desirable).
>
> This one is a bit on the tricky side. I'm going to call it "improper
> setfsuid use" so we can use just one CVE instead of two (as the flaws
> are
> related):
>
> Use CVE-2010-3430

MITRE votes for two, so here goes:

Let's use CVE-2010-3430 for the missing setfsgid.

Use CVE-2010-3431 for the missing return checks on setfsuid.

Thanks Steve.

-- 
    JB