[Full-disclosure] [CVE-2012-1574] Apache Hadoop user impersonation vulnerability


Users of Apache Hadoop should be aware of a security vulnerability recently
discovered, as described by the following CVE. In particular, please note
the "Users affected", "Versions affected", and "Mitigation" sections.


Aaron T. Myers
Software Engineer, Cloudera

CVE-2012-1574: Apache Hadoop user impersonation vulnerability

Severity: Critical

Vendor: The Apache Software Foundation

Versions Affected:
Hadoop,, and
Hadoop 1.0.0 to 1.0.1
Hadoop 0.23.0 to 0.23.1.

Users affected: Users who have enabled Hadoop's Kerberos/MapReduce security

Impact: Vulnerability allows an authenticated malicious user to impersonate
any other user on the cluster.

0.20.20x.x and 1.0.x users should upgrade to 1.0.2
0.23.x users should upgrade to 0.23.2 when it becomes available

This issue was discovered by Aaron T. Myers of Cloudera.
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