Comment 0 for bug 1593002

This issue is being treated as a potential security risk under embargo. Please do not make any public mention of embargoed (private) security vulnerabilities before their coordinated publication by the OpenStack Vulnerability Management Team in the form of an official OpenStack Security Advisory. This includes discussion of the bug or associated fixes in public forums such as mailing lists, code review systems and bug trackers. Please also avoid private disclosure to other individuals not already approved for access to this information, and provide this same reminder to those who are made aware of the issue prior to publication. All discussion should remain confined to this private bug report, and any proposed fixes should be added to the bug as attachments.
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YaqlYamlLoader inherits from YamlLoader, meaning that it is possible to use extended unsafe tags in yaml files http://pyyaml.org/wiki/PyYAMLDocumentation#YAMLtagsandPythontypes

dashboard, engine/api, and client are vulnerable.

CVE Description:
Kirill Zaitsev from Mirantis reported a vulnerability in OpenStack Murano applications processing. Using extended YAML tags in Murano application YAML files, an attacker can perform a Remote Code Execution attack.