Improper Privilege Management
Apache Hadoop blocks users or grants access to users incorrectly, if the system uses non-default groups mapping mechanisms.
Information Exposure
In Apache Hadoop, HDFS exposes extended attribute key/value pairs during `listXAttrs`, verifying only path-level search access to the directory rather than path-level read permission to the referent.
Information Exposure
Vulnerability in Apache Hadoop allows a cluster user to expose private files owned by the user running the `MapReduce` job history server process. The malicious user can construct a configuration file containing XML directives that reference sensitive files on the `MapReduce` job history server host.