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https://issues.apache.org/jira/browse/HADOOP-18235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18034799#comment-18034799
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ASF GitHub Bot commented on HADOOP-18235:
-----------------------------------------
github-actions[bot] commented on PR #4998:
URL: https://github.com/apache/hadoop/pull/4998#issuecomment-3476992841
We're closing this stale PR because it has been open for 100 days with no
activity. This isn't a judgement on the merit of the PR in any way. It's just a
way of keeping the PR queue manageable.
If you feel like this was a mistake, or you would like to continue working
on it, please feel free to re-open it and ask for a committer to remove the
stale tag and review again.
Thanks all for your contribution.
> vulnerability: we may leak sensitive information in LocalKeyStoreProvider
> --------------------------------------------------------------------------
>
> Key: HADOOP-18235
> URL: https://issues.apache.org/jira/browse/HADOOP-18235
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: lujie
> Assignee: Clay B.
> Priority: Critical
> Labels: pull-request-available
>
> Currently, we implement flush like:
> {code:java}
> // public void flush() throws IOException {
> super.flush();
> if (LOG.isDebugEnabled()) {
> LOG.debug("Resetting permissions to '" + permissions + "'");
> }
> if (!Shell.WINDOWS) {
> Files.setPosixFilePermissions(Paths.get(file.getCanonicalPath()),
> permissions);
> } else {
> // FsPermission expects a 10-character string because of the leading
> // directory indicator, i.e. "drwx------". The JDK toString method
> returns
> // a 9-character string, so prepend a leading character.
> FsPermission fsPermission = FsPermission.valueOf(
> "-" + PosixFilePermissions.toString(permissions));
> FileUtil.setPermission(file, fsPermission);
> }
> } {code}
> we wirite the Credential first, then set permission.
> The correct order is setPermission first, then write Credential .
> Otherswise, we may leak Credential . For example, the origin perms of file is
> 755(default on linux), when the Credential is flushed, Credential can be
> leaked when
>
> 1)between flush and setPermission, others have a chance to access the file.
> 2) CredentialShell(or the machine node ) crash between flush and
> setPermission, the file permission is 755 for ever before we run the
> CredentialShell again.
>
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