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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6438) Explicitly grant SocketPermission "listen" in default server policy
Date Fri, 03 Jan 2014 07:52:57 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13861310#comment-13861310
] 

Knut Anders Hatlen commented on DERBY-6438:
-------------------------------------------

{quote}
It is my understanding that it is up to the JVM to decide what range of ports to specify -
is that correct?
{quote}

That's my understanding too.

{quote}
In any case, I needed this backported to 10.10, so I did. Would there be an objection to backporting
it further?
{quote}

I don't see any problems with that.

Thanks.

> Explicitly grant SocketPermission "listen" in default server policy
> -------------------------------------------------------------------
>
>                 Key: DERBY-6438
>                 URL: https://issues.apache.org/jira/browse/DERBY-6438
>             Project: Derby
>          Issue Type: Improvement
>          Components: Network Server
>    Affects Versions: 10.11.0.0
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>             Fix For: 10.11.0.0
>
>         Attachments: d6438-1a.diff
>
>
> The network server needs SocketPermission "listen" on the port that it listens to, but
this permission is not granted by the basic server policy that's installed by default. This
doesn't cause any problems in most cases, since the JVM's default policy grants all code bases
SocketPermission "listen" on a range of ports, and Derby's network server port is within that
range.
> Still, the network server should not rely on this fact. It is possible to run the network
server on any port, not only those ports that happen be in the range that's given carte blanche
by the platform's default policy. The network server will however not be able to run on those
ports with the basic policy currently, only with a custom policy or with the security manager
disabled.
> The default policy should make this permission explicit.



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