[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20140722101554.GA13988@suse.de>
Date: Tue, 22 Jul 2014 12:15:54 +0200
From: Sebastian Krahmer <krahmer@...e.de>
To: oss-security@...ts.openwall.com
Subject: Linux peer_cred Mischmasch
Hi
There seem to be some inconsistencies in the handling of peer credentials
on UNIX sockets. I checked kernel 3.15.1 and runtime-tested on a 3.11.10.
While maybe_add_creds() (via SOCK_PASSCRED) and scm_send()
(via unix_{stream,dgram}_sendmsg()) use the real UID,
cred_to_ucred() (via SO_PEERCRED) passes the EUID (this time
also kuid_munged()).
That should probably being consolidated and in particular its unclear
to me why one time you need kuid munging and onother time you dont.
Sebastian
--
~ perl self.pl
~ $_='print"\$_=\47$_\47;eval"';eval
~ krahmer@...e.de - SuSE Security Team
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
