[220] in bugtraq
[8lgm]-Advisory-15.UNIX.mail3.28-Nov-1994
daemon@ATHENA.MIT.EDU ([8LGM] Security Team)
Mon Nov 28 03:18:12 1994
Date: Mon, 28 Nov 1994 05:28:51 GMT
From: "[8LGM] Security Team" <8lgm@bagpuss.demon.co.uk>
To: 8lgm-advisories@bagpuss.demon.co.uk, Alec.Muffett@sun.co.uk,
brad.powell@sun.com, bugtraq@fc.net, cert@cert.org,
Mark.Graff@Corp.Sun.COM, security-alert@sun.com
This advisory has been sent to:
comp.security.unix
BUGTRAQ <bugtraq@crimelab.com>
CERT/CC <cert@cert.org>
Sun Microsystems <security-alert@sun.com>
===========================================================================
[8lgm]-Advisory-15.UNIX.mail3.28-Nov-1994
PROGRAM:
SunOS 4.1.x binmail(1)
VULNERABLE OS's:
SunOS 4.1.x
PATCHID:
Tested up to SunOS 4.x SMCC Jumbo PATCH, 94/09/13 Patchid 100224-13
DESCRIPTION:
A hole in binmail(1) allows files to be created as root.
IMPACT:
Any user can become root.
REPEAT BY:
Exploit details will not be available.
DISCUSSION:
A flaw in binmail(1) reported to Sun by 8lgm some time ago, has not
been fixed in the the latest patch. (The latest patch does
fix the tmp file and mailbox creation problems successfully).
Using the src for binmail(1) posted to bugtraq, and the diff
for the latest patch provided to 8lgm by Sun to verify their fix,
we have created a secure binmail(1) for SunOS.
However, as both the diff and source for binmail(1) are covered
by copyright, we cannot post this fix.
We are therefore submitting our source to Sun, who we hope can
then supply a secure binmail(1) in the near future.
WORKAROUND & FIX:
1. Contact your vendor for a patch.
2. The current patch for binmail(1) is the most secure fix
available from Sun, so is recommended for use. If your system
is using a port of BSDs mail.local, we recommend continuing the
use of this.
FEEDBACK AND CONTACT INFORMATION:
8lgm-bugs@bagpuss.demon.co.uk (To report security flaws)
8lgm-request@bagpuss.demon.co.uk (Mailing list additions -
processed automatically;
just send any message)
8lgm@bagpuss.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-bugs@bagpuss.demon.co.uk is intended to be used by
people wishing to report which platforms/OS's the bugs in our
advisories are present on. Please do *not* send information on
other bugs to this address - report them to your vendor and/or
comp.security.unix instead.
8LGM MAILING LIST:
Send any message to 8lgm-request@bagpuss.demon.co.uk and the
address you mail from will automatically be added to the list.
If you need to subscribe to an address you cannot mail from
(eg an alias), send mail to 8lgm@bagpuss.demon.co.uk and request
to be added to the list. Due to our mail volume, we appreciate
it if you can use 8lgm-request instead; thus if you need to
subscribe an alias, please look into using, say sendmail -f,
if possible.
8LGM FILESERVER:
All [8LGM] advisories may be obtained via the [8LGM] fileserver.
For details, 'echo help | mail 8lgm-fileserver@bagpuss.demon.co.uk'
===========================================================================
