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Bugtraq archives for 4th quarter (Oct-Dec) 1994: [8lgm]-Advisory-12.UNIX.suid_exec.27-Jul-1991

[8lgm]-Advisory-12.UNIX.suid_exec.27-Jul-1991

[8LGM] Security Team (8lgmbagpuss.demon.co.uk)
Mon, 28 Nov 1994 02:39:33 GMT 

This advisory has been sent to:

        comp.security.unix

        BUGTRAQ                 <bugtraqfc.net>
        CERT/CC                 <certcert.org>

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                   [8lgm]-Advisory-12.UNIX.suid_exec.27-Jul-1991


PROGRAM:

	suid_exec	(Provided with ksh)

VERSION:

	11/16/88a

DESCRIPTION:

	suid_exec can be used to execute arbitrary programs as root.

IMPACT:

	Any user with access to suid_exec can become root.

REPEAT BY:

	Exploit details will not be made available at this time.

FIX:

	Obtain patch from your vendor.

WORKAROUND:

	Remove set bit from suid_exec in the interim.

DISCUSSION:

	suid_exec checks permissions on files in a poor manner,
	and does not verify the interpreter used in a secure fashion.

FEEDBACK AND CONTACT INFORMATION:

        8lgm-bugsbagpuss.demon.co.uk           (To report security flaws)

        8lgm-requestbagpuss.demon.co.uk        (Mailing list additions -
						 processed automatically;
						 just send any message)

        8lgmbagpuss.demon.co.uk                (Everything else)

        System Administrators are encouraged to contact us for any
        other information they may require about the problems described
        in this advisory.

        We welcome reports about which platforms this flaw does or does
        not exist on.

        NB: 8lgm-bugsbagpuss.demon.co.uk is intended to be used by
        people wishing to report which platforms/OS's the bugs in our
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        other bugs to this address - report them to your vendor and/or
        comp.security.unix instead.

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