From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leo Famulari Subject: CVE-2017-2616 in `su` Date: Thu, 23 Feb 2017 16:04:10 -0500 Message-ID: <20170223210410.GA24019@jasmine> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="d6Gm4EdcadzBjdND" Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:55905) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ch0Yj-0001KM-U9 for guix-devel@gnu.org; Thu, 23 Feb 2017 16:04:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ch0Yg-0003G0-PU for guix-devel@gnu.org; Thu, 23 Feb 2017 16:04:17 -0500 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:56898) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ch0Yg-0003Fp-LD for guix-devel@gnu.org; Thu, 23 Feb 2017 16:04:14 -0500 Received: from localhost (c-73-188-17-148.hsd1.pa.comcast.net [73.188.17.148]) by mail.messagingengine.com (Postfix) with ESMTPA id 7E6947E12B for ; Thu, 23 Feb 2017 16:04:12 -0500 (EST) Content-Disposition: inline List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: guix-devel@gnu.org --d6Gm4EdcadzBjdND Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In commit 1c851cbe0c562894bd38c0f9f39d12be306b3e59 I added a patch to the shadow package that fixes CVE-2017-2616 in `su`. This bug makes it possible for any local user to send SIGKILL to other processes with root privileges. For example, you could use this bug to make another user's screen locker exit. It is recommended to update your GuixSD systems, since shadow provides `su` on GuixSD. More information: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2616 http://seclists.org/oss-sec/2017/q1/490 http://seclists.org/oss-sec/2017/q1/474 https://github.com/shadow-maint/shadow/commit/08fd4b69e84364677a10e519ccb25b71710ee686 I also fixed the bug in util-linux by grafting this patch: https://github.com/karelzak/util-linux/commit/dffab154d29a288aa171ff50263ecc8f2e14a891 --d6Gm4EdcadzBjdND Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEsFFZSPHn08G5gDigJkb6MLrKfwgFAlivTkoACgkQJkb6MLrK fwjc7BAAt4MY76nNMDJrgiQnm9OEvuTpQTrmZkgZZ1TEjbpGD7sFoF5j/fZym5vU pUnbCuxcAeGg+OMJbieF8ZNrXiW4IaEUHQFD/MUFSkRFcTRXFw1C1HAjl21dt79U 8vjUNpVf/MVUOQb4hUhMd+yRV60JY6A/fKrpRATgiuNgfKj1UnKQPG9kDlxZt99f KuItJBatG1+7F2VcCPfBVABguYSxnip7Sre1WJzG7cJeGX/p0iQr5Rh3An6PRKPT tlRFesfi3YlTXU33OoVPFIU5qYTJWYvgRkeBlhRfZNCv1zCjk1hfFHXdzxswpDb8 FjEqVEh8FnWyUmQWu1R3p3bCXksVvPqAXGEP7IEzzWiBkABksJoc1zXhHnuybse8 c+BTT6rl7Yq7v+y3YAhYa1hpIj6yJ2LxwmcDrJFp9PgME65KjS0BlxRwwskIsiPj Qss1EKlKFJPUN7tejYOmCeOJxJkjvzjbTVbgT4K59yfhA2Nv8MXhLFGaqigZ8PTZ EItG+TWXlQBRn0Vdx7NNf0q7/CSP4K+DcdTnOALgQOAJ0swtYLe1ir5+tjgDrMz/ HsgbToh40sv/LvvR46jZaQwUD89HxE1dUcZmQb14lqlN9Zj5hLadiih4hft/DHh0 BAs58eSdAew3gNv4yJcqslC3DagOTVOWpqmjSZuG80TpRtD4Ojg= =D2Ea -----END PGP SIGNATURE----- --d6Gm4EdcadzBjdND--