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Message-Id: <201411222154.18944.tmb@65535.com>
Date: Sat, 22 Nov 2014 21:54:18 +0000
From: Tim Brown <tmb@...35.com>
To: oss-security@...ts.openwall.com
Cc: Solar Designer <solar@...nwall.com>
Subject: Re: Running Java across a privilege boundry
On Saturday 22 November 2014 19:36:58 Russ Allbery wrote:
> Marc Chadwick <marc@...dwick.net> writes:
> > I thought tomcat 6 used authbind in its init script, but I could be
> > wrong. If that's the case, authbind is written in C, so I'm not sure
> > that's what Tim has in mind. Similarly, jsvc is written in C. Maybe the
> > tabuki wrapper service?
>
> Ah, I see what you're getting at. I don't think I've ever used authbind
> with Tomcat (no need -- I never use privileged ports with it), but (since
> I use Debian) it gets spawned through start-stop-daemon, which is also
> written in C. You're saying that the running of the Java program has to
> be done *directly* by sudo for some reason?
>
> The initial question was a little obscure to me. I'm not sure what
> security problem the original poster is worried about. Starting Tomcat
> via sudo with that init script is indeed crossing a privilege boundary to
> run a Java program, but there are several layers of indirection there.
>
> Anyway, I have certainly worked with systems with command-line utilities
> written directly in Java that are run via sudo or other similar tools.
> The one that comes to mind (Zimbra) isn't open source, but I'm sure there
> are plenty of others.
Trying to work out if a "potential" security flaw in Java has a real world
misuse case that can be exploited. I think the answer is "yes" but thought I'd
ask the question before I took it any further.
I've sent a follow up to distros, which I hope Alexander will approve, to
allow the discussion to continue.
Tim
--
Tim Brown
<mailto:tmb@...35.com>
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