prevent templating of passwords from prompt (#59246)

* prevent templating of passwords from prompt

  fixes CVE-2019-10206

(cherry picked from commit e9a37f8e31)

changelogs/fragments/dont_template_passwords_from_prompt.yml

@@ -0,0 +1,2 @@
+bugfixes:
+    - resolves CVE-2019-10206, by avoiding templating passwords from prompt as it is probable they have special characters.

lib/ansible/cli/__init__.py

@@ -29,6 +29,7 @@ from ansible.release import __version__
 from ansible.utils.collection_loader import set_collection_playbook_paths
 from ansible.utils.display import Display
 from ansible.utils.path import unfrackpath
+from ansible.utils.unsafe_proxy import AnsibleUnsafeBytes
 from ansible.vars.manager import VariableManager
 
 
@@ -276,6 +277,13 @@ class CLI(with_metaclass(ABCMeta, object)):
         except EOFError:
             pass
 
+        # we 'wrap' the passwords to prevent templating as
+        # they can contain special chars and trigger it incorrectly
+        if sshpass:
+            sshpass = AnsibleUnsafeBytes(sshpass)
+        if becomepass:
+            becomepass = AnsibleUnsafeBytes(becomepass)
+
         return (sshpass, becomepass)
 
     def validate_conflicts(self, op, vault_opts=False, runas_opts=False, fork_opts=False, vault_rekey_opts=False):

lib/ansible/utils/unsafe_proxy.py

@@ -53,7 +53,7 @@
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
-from ansible.module_utils.six import string_types, text_type
+from ansible.module_utils.six import string_types, text_type, binary_type
 from ansible.module_utils._text import to_text
 from ansible.module_utils.common._collections_compat import Mapping, MutableSequence, Set
 
@@ -69,15 +69,18 @@ class AnsibleUnsafeText(text_type, AnsibleUnsafe):
     pass
 
 
+class AnsibleUnsafeBytes(binary_type, AnsibleUnsafe):
+    pass
+
+
 class UnsafeProxy(object):
     def __new__(cls, obj, *args, **kwargs):
         # In our usage we should only receive unicode strings.
         # This conditional and conversion exists to sanity check the values
         # we're given but we may want to take it out for testing and sanitize
         # our input instead.
-        if isinstance(obj, string_types):
-            obj = to_text(obj, errors='surrogate_or_strict')
-            return AnsibleUnsafeText(obj)
+        if isinstance(obj, string_types) and not isinstance(obj, AnsibleUnsafeBytes):
+            obj = AnsibleUnsafeText(to_text(obj, errors='surrogate_or_strict'))
         return obj