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gurke.py
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gurke.py
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#!/usr/bin/env python
import sys
import os
import socket
import pickle
import base64
import marshal
import types
import inspect
import encodings.string_escape
class Flag(object):
def __init__(self):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("172.17.0.1", 1234))
self.flag = s.recv(1024).strip()
s.close()
flag = Flag()
from seccomp import *
f = SyscallFilter(KILL)
f.add_rule_exactly(ALLOW, "read")
f.add_rule_exactly(ALLOW, "write", Arg(0, EQ, sys.stdout.fileno()))
f.add_rule_exactly(ALLOW, "write", Arg(0, EQ, sys.stderr.fileno()))
f.add_rule_exactly(ALLOW, "close")
f.add_rule_exactly(ALLOW, "exit_group")
f.add_rule_exactly(ALLOW, "open", Arg(1, EQ, 0))
f.add_rule_exactly(ALLOW, "stat")
f.add_rule_exactly(ALLOW, "lstat")
f.add_rule_exactly(ALLOW, "lseek")
f.add_rule_exactly(ALLOW, "fstat")
f.add_rule_exactly(ALLOW, "getcwd")
f.add_rule_exactly(ALLOW, "readlink")
f.add_rule_exactly(ALLOW, "mmap", Arg(3, MASKED_EQ, 2, 2))
f.add_rule_exactly(ALLOW, "munmap")
f.load()
data = os.read(0, 4096)
try:
res = pickle.loads(data)
print 'res: %r\n' % res
except Exception as e:
print >>sys.stderr, "exception", repr(e)
os._exit(0)