CVE-2017-8438
HighSummary
Elastic X-Pack Security versions 5.0.0 to 5.4.0 contain a privilege escalation bug in the run_as functionality. This bug prevents transitioning into the specified user in a run_as request, leading to incorrect behavior.
Risk Assessment
The organization may be exposed to unauthorized access to resources if roles were created using templates containing _user properties. Additionally, if the specified run_as user does not exist, the transition will not occur, potentially leading to unpredictable system behavior.
Recommendation
It is recommended to update Elastic X-Pack Security to a version that does not contain this vulnerability. Also, verify role and user configurations to ensure they are correct.
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Original NVD description (English source)
Elastic X-Pack Security versions 5.0.0 to 5.4.0 contain a privilege escalation bug in the run_as functionality. This bug prevents transitioning into the specified user specified in a run_as request. If a role has been created using a template that contains the _user properties, the behavior of run_as will be incorrect. Additionally if the run_as user specified does not exist, the transition will not happen.

