| Package | Affected versions | Patched versions |
|---|---|---|
| org.apache.hadoop:hadoop-client | ≥ 2.0.0-alpha, < 2.0.1-alpha | 2.0.1-alpha |
| hadoop | = 2.0.0 |
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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