Linux task-controller determines its own path insecurely
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Key: MAPREDUCE-1994
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1994
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: security, task-controller
Affects Versions: 0.22.0
Reporter: Todd Lipcon
Priority: Critical
The task-controller uses argv[0] to determine its own path, and then calls
stat() on that. Instead it should stat("/proc/self/exe") directly. This is
important since argv[0] can be spoofed to point to another program and thus
either fool the autodetection of HADOOP_HOME or evade various permissions
checks.
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