bugtraq - Re: Hijacking Apache 2 via mod

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Message-ID: <40109B2A.90901@divisionbyzero.com>
Date: Thu, 22 Jan 2004 19:55:22 -0800
From: jon schatz <jon@...isionbyzero.com>
To: Steve G <linux_4ever@...oo.com>
Cc: "\"André\" Malo" <nd@...lig.de>,
	3APA3A <3APA3A@...URITY.NNOV.RU>, Ben Laurie <ben@...roup.co.uk>,
	bugtraq@...urityfocus.com, httpd security <security@...pd.apache.org>
Subject: Re: Hijacking Apache 2 via mod_perl

Steve G wrote:

>>Then one just writes a perl extension in C. Who's responsible 
>>then? 
> But don't you need root to add extentions?

>>Who's responsible if you just write a C module which hijacks the
>>descriptors? 
> Again, you need an admin to update apache's config.

you need an admin to update the config file if you're trying to use the 
LoadModule directive. but if mod_perl's already running (and if 
.htaccess files aren't locked down enough), you can use the SetHandler 
to load up any (malicous) modules you might need. afaik, loading a 
module once in mod_perl will make it available to every child process. 
if i've been reading this thread right (and there's a good chance i 
haven't) then this would give EvilModule.pm access to the leaked fd's.

(i haven't tested this for httpd2/mod_perl2, but i know it holds true 
for httpd1.3.x/mod_perl, and the new docs don't indicate any changes).

-jon
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