diff --git a/pkgs/applications/version-management/bazaar/CVE-2017-14176.patch b/pkgs/applications/version-management/bazaar/CVE-2017-14176.patch
new file mode 100644
index 000000000000..a34ab0c6eb10
--- /dev/null
+++ b/pkgs/applications/version-management/bazaar/CVE-2017-14176.patch
@@ -0,0 +1,149 @@
+diff --git a/bzrlib/tests/test_ssh_transport.py b/bzrlib/tests/test_ssh_transport.py
+index 9e37c3b..fe9f219 100644
+--- a/bzrlib/tests/test_ssh_transport.py
++++ b/bzrlib/tests/test_ssh_transport.py
+@@ -22,6 +22,7 @@ from bzrlib.transport.ssh import (
+     SSHCorpSubprocessVendor,
+     LSHSubprocessVendor,
+     SSHVendorManager,
++    StrangeHostname,
+     )
+ 
+ 
+@@ -161,6 +162,19 @@ class SSHVendorManagerTests(TestCase):
+ 
+ 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 @@ class SubprocessVendorsTests(TestCase):
+                 "-oNoHostAuthenticationForLocalhost=yes",
+                 "-p", "100",
+                 "-l", "user",
++                "--",
+                 "host", "bzr"]
+             )
+ 
+@@ -184,9 +199,16 @@ class SubprocessVendorsTests(TestCase):
+                 "-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 @@ class SubprocessVendorsTests(TestCase):
+                 "-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 @@ class SubprocessVendorsTests(TestCase):
+                 "--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(
+diff --git a/bzrlib/transport/ssh.py b/bzrlib/transport/ssh.py
+index eecaa26..6f22341 100644
+--- a/bzrlib/transport/ssh.py
++++ b/bzrlib/transport/ssh.py
+@@ -46,6 +46,10 @@ else:
+     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 @@ class SubprocessVendor(SSHVendor):
+     # 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 @@ class OpenSSHSubprocessVendor(SubprocessVendor):
+         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 @@ class SSHCorpSubprocessVendor(SubprocessVendor):
+ 
+     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 @@ class LSHSubprocessVendor(SubprocessVendor):
+ 
+     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 @@ class PLinkSubprocessVendor(SubprocessVendor):
+ 
+     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)])
diff --git a/pkgs/applications/version-management/bazaar/default.nix b/pkgs/applications/version-management/bazaar/default.nix
index 72e010fd283c..fea6fb358303 100644
--- a/pkgs/applications/version-management/bazaar/default.nix
+++ b/pkgs/applications/version-management/bazaar/default.nix
@@ -1,5 +1,4 @@
 { stdenv, fetchurl, python2Packages
-, fetchpatch
 , withSFTP ? true
  }:
 
@@ -21,11 +20,7 @@ python2Packages.buildPythonApplication rec {
   patches = [
     # Bazaar can't find the certificates alone
     ./add_certificates.patch
-    (fetchpatch {
-      url = "https://bazaar.launchpad.net/~brz/brz/trunk/revision/6754";
-      sha256 = "0mdqa9w1p6cmli6976v4wi0sw9r4p5prkj7lzfd1877wk11c9c73";
-      name = "CVE-2017-14176.patch";
-    })
+    ./CVE-2017-14176.patch
   ];
   postPatch = ''
     substituteInPlace bzrlib/transport/http/_urllib2_wrappers.py \