UnixAuthenticationService in Apache Ranger 1.2.0 was updated to correctly handle user input to avoid Stack-based buffer overflow. Versions prior to 1.2.0 should be upgraded to 1.2.0
https://seclists.org/oss-sec/2018/q4/11
https://cwiki.apache.org/confluence/display/RANGER/Vulnerabilities+found+in+Ranger