[ https://issues.apache.org/jira/browse/HADOOP-12888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Loughran updated HADOOP-12888: ------------------------------------ Resolution: Fixed Fix Version/s: 2.9.0 Status: Resolved (was: Patch Available) +1, patch applied to Hadoop 2.9+ thanks! > Shell to disable bash and setsid support when running under JVM security > manager > -------------------------------------------------------------------------------- > > Key: HADOOP-12888 > URL: https://issues.apache.org/jira/browse/HADOOP-12888 > Project: Hadoop Common > Issue Type: Bug > Components: security > Affects Versions: 2.7.2 > Environment: Linux > Reporter: Costin Leau > Assignee: Costin Leau > Fix For: 2.9.0 > > Attachments: HADOOP-12888-001.patch, HADOOP-12888-002.patch, > HADOOP-12888-003.patch > > > HDFS _client_ requires dangerous permission, in particular _execute_ on _all > files_ despite only trying to connect to an HDFS cluster. > A full list (for both Hadoop 1 and 2) is available here along with the place > in code where they occur. > While it is understandable for some permissions to be used, requiring > {{FilePermission <<ALL FILES>> execute}} to simply initialize a class field > [Shell|https://github.com/apache/hadoop/blob/0fa54d45b1cf8a29f089f64d24f35bd221b4803f/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/Shell.java#L728] > which in the end is not used (since it's just a client) simply *compromises* > the entire security system. > To make matters worse, the code is executed to initialize a field so in case > the permissions is not granted, the VM fails with {{InitializationError}} > which is unrecoverable. > Ironically enough, on Windows this problem does not appear since the code > simply bypasses it and initializes the field with a fall back value > ({{false}}). > A quick fix would be to simply take into account that the JVM > {{SecurityManager}} might be active and the permission not granted or that > the external process fails and use a fall back value. > A proper and long-term fix would be to minimize the use of permissions for > hdfs client since it is simply not required. A client should be as light as > possible and not have the server requirements leaked onto. -- This message was sent by Atlassian JIRA (v6.3.4#6332)