Kerberos-enabled DataNodes in Apache Hadoop 2.0.0 alpha allow unauthorized access to blocks

CVE-2012-3376 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

DataNodes in Apache Hadoop 2.0.0 alpha does not check the BlockTokens of clients when Kerberos is enabled and the DataNode has checked out the same BlockPool twice from a NodeName, which might allow remote clients to read arbitrary blocks, write to blocks to which they only have read access, and have other unspecified impacts.

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