Switch to max JDK allowed to improve vulnerability scores #262
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Each of these GeoServer versions runs on 2 JDK versions. By switching the (internal to Docker) JDK version to the most recent of the 2, allows us to improve vulnerability scores. For 2.28: runs on 17, 21 -> 21 For 2.27: runs on 11, 17 -> 17
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See the supported versions: https://github.com/geoserver/geoserver/wiki/Release-Schedule |
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Pull request overview
This PR upgrades the base JDK versions used for GeoServer Docker images to reduce security vulnerabilities. The changes update the internal JDK versions to the maximum supported by each GeoServer version series.
Changes:
- Updated GeoServer 2.28.x to use JDK 21 (previously JDK 17)
- Updated GeoServer 2.27.x and earlier to use JDK 17 (previously JDK 11)
- Modified the release script to automatically select the appropriate JDK version based on the GeoServer version
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I would like to implement this security upgrade before 2.28.2 (imminent), please @buehner. Any objections? |
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Each of these GeoServer versions runs on 2 JDK versions. By switching the (internal to Docker) JDK version to the most recent of the 2, allows us to improve vulnerability scores.
For 2.28: runs on 17, 21 -> 21
For 2.27: runs on 11, 17 -> 17
e.g. for 2.28, Docker Scout reports 1 less High Severity and 14 less Medium Severity by switching from jdk17 to 21