bugtraq - Re: squirrelmail CSRF vulnerability

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Date: Thu, 10 May 2007 15:37:11 -0400 (EDT)
From: Josh Zlatin-Amishav <josh@...at.cc>
To: p3rlhax@...il.com
Cc: bugtraq@...urityfocus.com
Subject: Re: squirrelmail CSRF vulnerability

On Thu, 10 May 2007 p3rlhax@...il.com wrote:

> IV. DETECTION
>
> Latest version of squirrel mail 1.4.8-4.fc6 and prior are found vulnerable.
>
> V. WORKAROUND
>
> I.  Application should check for Referer Header in every post login request.

Referer headers can be forged via Flash, so it is not a good idea to
rely on these for security.

>
> II. Application should use CSRF token which is random enough to identify every legitimate post login request.

According to: http://squirrelmail.org/security/issue/2006-12-02 version
1.4.8-4 is vulnerable to a XSS vulnerability, so an attacker could use the
XSS vector to grab the session token ("CSRF token") and continue the 
CSRF attack.

--
  - Josh