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Subject: Caldera Security Advisory SA-1997.22: Vulnerability in mgetty

Caldera Security Advisory SA-1997.22

RPM build date:        26-Jul-1997
Advisory issue date:   29-Sep-1997

Topic: Vulnerability in mgetty package

I. Problem Description

	A security hole was found in the auxiliary fax scripts "faxq" and
	"faxrunq" in the mgetty+sendfax package.  It has been in there since
	the first day those scripts were written.  Due to improper quoting in
	these shell scripts, it's possible to execute code with a foreign user
	id, and get root access to the machine.

II. Impact
	Normal users have the ability to gain root access on a local host.

	The mgetty package distributed on the following OpenLinux
	releases are vulnerable:

		Lite 1.1
		Base 1.1
		Standard 1.1

	This new mgetty has been found to function properly on all of
	the distributions shown above.

III. Solution

	Install the new mgetty-1.1.1_Jan28-2 package, as described below.
	Both binary and source packages are located on Caldera's FTP server
	(ftp.caldera.com):

	ftp://ftp.caldera.com/pub/openlinux/updates/1.1/current/

	The md5sums for these packages are:
	34be17c12fca2ffc7ba4f4808627c4cd  SRPMS/mgetty-1.1.1_Jan28-2.src.rpm
	38f991c8432a0e1cb376cdd87656e73d  RPMS/mgetty-1.1.1_Jan28-2.i386.rpm

	To install the update use the following command:
		rpm -U RPMS/mgetty-1.1.1_Jan28-2.i386.rpm

IV. References / Credits

	Fixes a security problem reported on the "BugTraq" email list
	disclosed 24-July-1997 by Gert Doering <gert@GREENIE.MUC.DE>.
	Message-Id: <m0wrUPl-0000IxC@greenie.muc.de>.

	Credits for finding the problem go to Herbert Thielen
	(thielen@lpr.e-technik.tu-muenchen.de).

	The mgetty web site is:

		http://www.leo.org/~doering/mgetty/

	This and other Caldera security resources are located at:

		http://www.caldera.com/tech-ref/security/

V. PGP Signature

	This message was signed with the PGP key for <security@caldera.com>.

	This key can be obtained from:
		ftp://ftp.caldera.com/pub/pgp-keys/

	Or on an OpenLinux CDROM under:
		/OpenLinux/pgp-keys/

	$Id: SA-1997.22,v 1.1 1997/09/29 20:44:54 ron Exp $

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