full-disclosure - Medium security hole in Varnish reverse proxy

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Message-Id: <201003290850.22750.timb@nth-dimension.org.uk>
Date: Mon, 29 Mar 2010 08:49:55 +0100
From: Tim Brown <timb@...-dimension.org.uk>
To: "Undisclosed.Recipients:"@lists.grok.org.uk
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: Medium security hole in Varnish reverse proxy

Hi,

I've identified a couple of security flaws affecting the Varnish reverse proxy 
which may allow privilege escalation. These issues were reported by email to 
the vendor but he feels that it is a configurational issue rather than a design 
flaw.  Whilst I can partially see his point in that the administrative 
interface can be disabled, I'm not convinced that making a C compiler 
available over a network interface without authentication is sound practice, 
especially when the resultant compiled code can be made to run as root rather 
trivially.

Tim
-- 
Tim Brown
<mailto:timb@...-dimension.org.uk>
<http://www.nth-dimension.org.uk/>

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