Sean R. Owen created SPARK-35373:
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Summary: Verify checksums of downloaded artifacts in build/mvn
Key: SPARK-35373
URL: https://issues.apache.org/jira/browse/SPARK-35373
Project: Spark
Issue Type: Improvement
Components: Build
Affects Versions: 3.1.1, 3.0.2, 2.4.7
Reporter: Sean R. Owen
Assignee: Sean R. Owen
build/mvn is a convenience script that will automatically download Maven (and
Scala) if not already present. While it downloads from official ASF mirrors, it
does not check the checksum of the artifact, which is available as a .sha512
file from ASF servers.
The risk of a supply chain attack is a bit less theoretical here than usual,
because artifacts are downloaded from any of several mirrors worldwide, and
injecting a malicious copy of Maven in any one of them might be simpler and
less noticeable than injecting it into ASF servers.
(Note, Scala's download site does not seem to provide a checksum. They do all
come from Lightbend, at least, not N mirrors. Not much we can do there.)
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