This is an information disclosure vulnerability in Apache Hadoop before 2.6.4 and 2.7.x before 2.7.2 in the short-circuit reads feature of HDFS. A local user on an HDFS DataNode may be able to craft a block token that grants unauthorized read access to random files by guessing certain fields in the token.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| org.apache.hadoop:hadoop-common(Maven) | 0 | 2.6.4 | N/A |
| org.apache.hadoop:hadoop-common(Maven) | 2.7.0 | 2.7.2 | N/A |
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