Severity: Important Vendor: The Apache Software Foundation
Versions affected: All Spark 1.x, Spark 2.0.x, Spark 2.1.x, and 2.2.x versions Spark 2.3.0 to 2.3.2 Description: Prior to Spark 2.3.3, in certain situations Spark would write user data to local disk unencrypted, even if spark.io.encryption.enabled=true. This includes cached blocks that are fetched to disk (controlled by spark.maxRemoteBlockSizeFetchToMem); in SparkR, using parallelize; in Pyspark, using broadcast and parallelize; and use of python udfs. Mitigation: 1.x, 2.0.x, 2.1.x, 2.2.x, 2.3.x users should upgrade to 2.3.3 or newer, including 2.4.x. Credit: This issue was reported by Thomas Graves of NVIDIA. References: https://spark.apache.org/security.html https://issues.apache.org/jira/browse/SPARK-28626
