JAWmail XSS

From: Ulf Harnhammar (ulfhat_private)
Date: Sun Sep 22 2002 - 17:27:43 PDT

Next message: Jouko Pynnonen: "Technical information about the vulnerabilities fixed by MS-02-52"

Previous message: Bert Vanmanshoven: "remote exploitable heap overflow in Null HTTPd 0.5.0"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

JAWmail XSS


PROGRAM: JAWmail
VENDOR: Rudi Benkovic <rudiat_private> et al.
HOMEPAGE: http://www.jawmail.org/
VULNERABLE VERSIONS: 1.0-rc1, possibly others
IMMUNE VERSIONS: 2.0-rc1 and later
LOGIN REQUIRED: no
SEVERITY: high


DESCRIPTION:

JAWmail (Just Another Web Mail) is a pretty ambitious web mail
client project. It is written in PHP, and it is published under
the GNU GPL.


SUMMARY:

There are several cross-site scripting holes in JAWmail that are
triggered by reading incoming e-mail messages. An attacker can
use them to take over a victim's e-mail account by simply sending
certain malicious e-mails to the victim.


TECHNICAL DETAILS:

1) Read Mail shows the names of attached files without cleaning
those names (removing HTML elements).

2) text/html mails are not cleaned at all, when they are shown in
a pop-up window.

3) When Read Mail displays text/html mails, they are cleaned with
PHP's strip_tags() function with some appropriate parameters. This
function removes evil HTML elements, but not nice HTML elements
with evil HTML attributes, so you can still perform XSS attacks like:

<b onMouseOver="alert(document.cookie)">bolder</b>


// Ulf Harnhammar
ulfhat_private
http://www.metaur.nu/

Next message: Jouko Pynnonen: "Technical information about the vulnerabilities fixed by MS-02-52"
Previous message: Bert Vanmanshoven: "remote exploitable heap overflow in Null HTTPd 0.5.0"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b30 : Mon Sep 23 2002 - 08:39:28 PDT