@@ 0,0 1,166 @@
+Fix CVE-2017-14176:
+
+https://bugs.launchpad.net/bzr/+bug/1710979
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14176
+
+Patch copied from Debian's Bazaar package version bzr_2.7.0+bzr6619-7+deb9u1:
+
+https://alioth.debian.org/scm/loggerhead/pkg-bazaar/bzr/2.7/revision/4204
+
+Description: Prevent SSH command line options from being specified in bzr+ssh:// URLs
+Bug: https://bugs.launchpad.net/brz/+bug/1710979
+Bug-Debian: https://bugs.debian.org/874429
+Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2017-14176
+Forwarded: no
+Author: Jelmer Vernooij <jelmer@jelmer.uk>
+Last-Update: 2017-11-26
+
+=== modified file 'bzrlib/tests/test_ssh_transport.py'
+--- old/bzrlib/tests/test_ssh_transport.py 2010-10-07 12:45:51 +0000
++++ new/bzrlib/tests/test_ssh_transport.py 2017-08-20 01:59:20 +0000
+@@ -22,6 +22,7 @@
+ SSHCorpSubprocessVendor,
+ LSHSubprocessVendor,
+ SSHVendorManager,
++ StrangeHostname,
+ )
+
+
+@@ -161,6 +162,19 @@
+
+ class SubprocessVendorsTests(TestCase):
+
++ def test_openssh_command_tricked(self):
++ vendor = OpenSSHSubprocessVendor()
++ self.assertEqual(
++ vendor._get_vendor_specific_argv(
++ "user", "-oProxyCommand=blah", 100, command=["bzr"]),
++ ["ssh", "-oForwardX11=no", "-oForwardAgent=no",
++ "-oClearAllForwardings=yes",
++ "-oNoHostAuthenticationForLocalhost=yes",
++ "-p", "100",
++ "-l", "user",
++ "--",
++ "-oProxyCommand=blah", "bzr"])
++
+ def test_openssh_command_arguments(self):
+ vendor = OpenSSHSubprocessVendor()
+ self.assertEqual(
+@@ -171,6 +185,7 @@
+ "-oNoHostAuthenticationForLocalhost=yes",
+ "-p", "100",
+ "-l", "user",
++ "--",
+ "host", "bzr"]
+ )
+
+@@ -184,9 +199,16 @@
+ "-oNoHostAuthenticationForLocalhost=yes",
+ "-p", "100",
+ "-l", "user",
+- "-s", "host", "sftp"]
++ "-s", "--", "host", "sftp"]
+ )
+
++ def test_openssh_command_tricked(self):
++ vendor = SSHCorpSubprocessVendor()
++ self.assertRaises(
++ StrangeHostname,
++ vendor._get_vendor_specific_argv,
++ "user", "-oProxyCommand=host", 100, command=["bzr"])
++
+ def test_sshcorp_command_arguments(self):
+ vendor = SSHCorpSubprocessVendor()
+ self.assertEqual(
+@@ -209,6 +231,13 @@
+ "-s", "sftp", "host"]
+ )
+
++ def test_lsh_command_tricked(self):
++ vendor = LSHSubprocessVendor()
++ self.assertRaises(
++ StrangeHostname,
++ vendor._get_vendor_specific_argv,
++ "user", "-oProxyCommand=host", 100, command=["bzr"])
++
+ def test_lsh_command_arguments(self):
+ vendor = LSHSubprocessVendor()
+ self.assertEqual(
+@@ -231,6 +260,13 @@
+ "--subsystem", "sftp", "host"]
+ )
+
++ def test_plink_command_tricked(self):
++ vendor = PLinkSubprocessVendor()
++ self.assertRaises(
++ StrangeHostname,
++ vendor._get_vendor_specific_argv,
++ "user", "-oProxyCommand=host", 100, command=["bzr"])
++
+ def test_plink_command_arguments(self):
+ vendor = PLinkSubprocessVendor()
+ self.assertEqual(
+
+=== modified file 'bzrlib/transport/ssh.py'
+--- old/bzrlib/transport/ssh.py 2015-07-31 01:04:41 +0000
++++ new/bzrlib/transport/ssh.py 2017-08-20 01:59:20 +0000
+@@ -46,6 +46,10 @@
+ from paramiko.sftp_client import SFTPClient
+
+
++class StrangeHostname(errors.BzrError):
++ _fmt = "Refusing to connect to strange SSH hostname %(hostname)s"
++
++
+ SYSTEM_HOSTKEYS = {}
+ BZR_HOSTKEYS = {}
+
+@@ -360,6 +364,11 @@
+ # tests, but beware of using PIPE which may hang due to not being read.
+ _stderr_target = None
+
++ @staticmethod
++ def _check_hostname(arg):
++ if arg.startswith('-'):
++ raise StrangeHostname(hostname=arg)
++
+ def _connect(self, argv):
+ # Attempt to make a socketpair to use as stdin/stdout for the SSH
+ # subprocess. We prefer sockets to pipes because they support
+@@ -424,9 +433,9 @@
+ if username is not None:
+ args.extend(['-l', username])
+ if subsystem is not None:
+- args.extend(['-s', host, subsystem])
++ args.extend(['-s', '--', host, subsystem])
+ else:
+- args.extend([host] + command)
++ args.extend(['--', host] + command)
+ return args
+
+ register_ssh_vendor('openssh', OpenSSHSubprocessVendor())
+@@ -439,6 +448,7 @@
+
+ def _get_vendor_specific_argv(self, username, host, port, subsystem=None,
+ command=None):
++ self._check_hostname(host)
+ args = [self.executable_path, '-x']
+ if port is not None:
+ args.extend(['-p', str(port)])
+@@ -460,6 +470,7 @@
+
+ def _get_vendor_specific_argv(self, username, host, port, subsystem=None,
+ command=None):
++ self._check_hostname(host)
+ args = [self.executable_path]
+ if port is not None:
+ args.extend(['-p', str(port)])
+@@ -481,6 +492,7 @@
+
+ def _get_vendor_specific_argv(self, username, host, port, subsystem=None,
+ command=None):
++ self._check_hostname(host)
+ args = [self.executable_path, '-x', '-a', '-ssh', '-2', '-batch']
+ if port is not None:
+ args.extend(['-P', str(port)])
+