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Re: apache user invoking svn

From: Bradley Wagner <bradley.wagner_at_hannonhill.com>
Date: 2006-07-27 19:48:47 CEST

On Jul 27, 2006, at 1:33 PM, Toby Johnson wrote:

> Nico Kadel-Garcia wrote:
>> Toby Johnson wrote:
>>> Bradley Wagner wrote:
>>>>> svnserve.conf has no affect on Apache, are you running svnserve as
>>>>> well? If your goal is to ensure all access is via http only,
>>>>> all you
>>>>> need to do is make the repo directory owned by the Apache user,
>>>>> with
>>>>> +rwX permissions, and no permissions for group or others.
>>>> yes, that is exactly my goal. I was wondering if there was any more
>>>> elegant way in svn to disable access via svn+ssh:// other than
>>>> changing the directory ownership to be only the user running
>>>> apache.
>>>> I think managing a separate authz_db file for svnserve.conf that
>>>> just
>>>> disables all access would probably be easiest. Though, will that
>>>> affect apache's ability to invoke svn? I guess I'm a little unclear
>>>> about the different mechanisms for invoking SVN.
>>>> Bradley
>>> How is setting filesystem permissions inelegant? That's exactly what
>>> filesystem permissions are for. The problem is that the svn repo is
>>> just a bunch of files. If someone has access to those files, they
>>> could either access them directly using file://, or they could
>>> set up
>>> their own svnserve process or their own Apache process or whatever
>>> they want to to bypass whatever you might set in some configuration
>>> file.
>>> So the answer is no, there is no way to prevent svn+ssh access
>>> through a config file, because there is no way to force clients to
>>> even use your config file. If you want to prevent all access except
>>> via Apache, then using filesystem permissions is the only way to
>>> accomplish that.
>> There's the pre-commit script and svnperms.conf and svnperms.py,
>> which works just fine.
> That's still just a ruse. If someone really wanted to they could
> bypass the pre-commit scripts, or overwrite them. My point is that
> unless you restrict filesystem permissions to just the users that
> have any business writing to those files directly, there's really
> no way to secure it.
> If you only want Apache reading/writing those files then only
> Apache should have filesystem permissions to do so, period. Unless
> I'm misunderstanding the problem, that is the issue he is trying to
> solve.

No, you're understanding it correctly and I think you're absolutely
right. Because a user logged on locally could still access the
repository using the file:// bypassing svnserve and the associated
svnserve.conf file all together. It makes sense that if I want to
only allow apache access that the user running the apache process be
the only ones with access to the file.

Thanks for taking the time to explain it.


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Received on Thu Jul 27 19:50:24 2006

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