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https://issues.apache.org/jira/browse/DERBY-5363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13114780#comment-13114780
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Dag H. Wanvik commented on DERBY-5363:
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I had a new regression error. It turned out that after I changed to implicit
fixure addition, the indeterministic test fixture ordering resulting under Java
7 intermittently exposed a bug: If the test containing the jar file install
were executed prior to the backup test, the database would contain a jar file
which is, of course, then also backed up. There was code to to handle this, but
it wasn't part of the test and it had a bug. Fixed now in version *-full-5,
which I upload. Rerunning regressions.
> Tighten default permissions of DB files with >= JDK6
> ----------------------------------------------------
>
> Key: DERBY-5363
> URL: https://issues.apache.org/jira/browse/DERBY-5363
> Project: Derby
> Issue Type: Improvement
> Components: Miscellaneous, Services, Store
> Reporter: Dag H. Wanvik
> Assignee: Dag H. Wanvik
> Attachments: derby-5363-basic-1.diff, derby-5363-basic-1.stat,
> derby-5363-basic-2.diff, derby-5363-basic-2.stat, derby-5363-basic-3.diff,
> derby-5363-basic-3.stat, derby-5363-full-1.diff, derby-5363-full-1.stat,
> derby-5363-full-2.diff, derby-5363-full-2.stat, derby-5363-full-3.diff,
> derby-5363-full-3.stat, derby-5363-full-4.diff, derby-5363-full-4.stat,
> derby-5363-server-1.diff, permission-5.diff, permission-5.stat,
> permission-6.diff, permission-6.stat, property-table.png, releaseNote.html,
> releaseNote.html, releaseNote.html, releaseNote.html, z.sql
>
>
> Before Java 6, files created by Derby would have the default
> permissions of the operating system context. Under Unix, this would
> depend on the effective umask of the process that started the Java VM.
> In Java 6 and 7, there are methods available that allows tightening up this
> (File.setReadable, setWritable), making it less likely that somebody
> would accidentally run Derby with a too lenient default.
> I suggest we take advantage of this, and let Derby by default (in Java
> 6 and higher) limit the visibility to the OS user that starts the VM,
> e.g. on Unix this would be equivalent to running with umask 0077. More
> secure by default is good, I think.
> We could have a flag, e.g. "derby.storage.useDefaultFilePermissions"
> that when set to true, would give the old behavior.
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