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Fixing security issue with lookup returns not tainting the jinja2 environment

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CVE-2017-7481

Lookup returns wrap the result in unsafe, however when used through the
standard templar engine, this does not result in the jinja2 environment being
marked as unsafe as a whole. This means the lookup result looses the unsafe
protection and may become simple unicode strings, which can result in bad
things being re-templated.

This also adds a global lookup param and cfg options for lookups to allow
unsafe returns, so users can force the previous (insecure) behavior.
This commit is contained in:
James Cammarata 2017-05-08 10:37:10 -05:00
commit ed56f51f18
4 changed files with 31 additions and 3 deletions
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lib/ansible/constants.py
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@ -236,6 +236,7 @@ DEFAULT_INVENTORY_IGNORE = get_config(p, DEFAULTS, 'inventory_ignore_extensions
["~", ".orig", ".bak", ".ini", ".cfg", ".retry", ".pyc", ".pyo"], value_type='list')
DEFAULT_VAR_COMPRESSION_LEVEL = get_config(p, DEFAULTS, 'var_compression_level', 'ANSIBLE_VAR_COMPRESSION_LEVEL', 0, value_type='integer')
DEFAULT_INTERNAL_POLL_INTERVAL = get_config(p, DEFAULTS, 'internal_poll_interval', None, 0.001, value_type='float')
DEFAULT_ALLOW_UNSAFE_LOOKUPS = get_config(p, DEFAULTS, 'allow_unsafe_lookups', None, False, value_type='boolean')
ERROR_ON_MISSING_HANDLER = get_config(p, DEFAULTS, 'error_on_missing_handler', 'ANSIBLE_ERROR_ON_MISSING_HANDLER', True, value_type='boolean')
SHOW_CUSTOM_STATS = get_config(p, DEFAULTS, 'show_custom_stats', 'ANSIBLE_SHOW_CUSTOM_STATS', False, value_type='boolean')
NAMESPACE_FACTS = get_config(p, DEFAULTS, 'restrict_facts_namespace', 'ANSIBLE_RESTRICT_FACTS', False, value_type='boolean')