full-disclosure - Re: pidgin OTR information leakage

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Date: Mon, 27 Feb 2012 20:37:04 +0100
From: Michele Orru <antisnatchor@...il.com>
To: Jann Horn <jannhorn@...glemail.com>
Cc: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk
Subject: Re: pidgin OTR information leakage

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Jann Horn wrote:
> 2012/2/25 Dimitris Glynos <dimitris@...sus-labs.com>:
>> Pidgin transmits OTR (off-the-record) conversations over DBUS in 
>> plaintext. This makes it possible for attackers that have gained 
>> user-level access on a host, to listen in on private conversations 
>> associated with the victim account.
> 
> Basically, you're saying that if I have the rights of a user on a 
> machine, I can access the private conversations of that user? Ooooh 
> no. Well, I can also copy his keyfiles, no? And I can alter his 
> settings. And spawn fake "Update didn't work, please enter root 
> password to proceed" windows. I could alter his ~/.bashrc so that 
> whenever he launches "sudo" or "su", a script is launched instead
> that grabs his password. So, please, what's the point?

I think you didn't understood the content of the advisory.
If there are 10 non-root users in an Ubuntu machine for example,
if user 1 is using pidgin with OTR compiled with DBUS, then user 2 to 10
can see what user 1 pidgin conversation.

"Simple" as that, without impersonating user 1 or knowing his password.

Cheers
antisnatchor

> 
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