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Category:   Application (E-mail Server)  >   SquirrelMail Vendors:   SquirrelMail Development Team
(Red Hat Issues Fix) SquirrelMail Input Validation Holes in HTML Filter Permit Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1018080
SecurityTracker URL:  http://securitytracker.com/id/1018080
CVE Reference:   CVE-2007-1262, CVE-2007-2589   (Links to External Site)
Date:  May 17 2007
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.4.0 - 1.4.9a
Description:   A vulnerability was reported in SquirrelMail. A remote user can conduct cross-site scripting attacks.

The HTML filter does not properly filter HTML code from user-supplied e-mail before displaying the e-mail. A remote user can send a specially crafted e-mail that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the SquirrelMail software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Certain 'data:' URLs, character sets, and image tags can be used to exploit these vulnerabilities.

The vendor credits Mikhail Markin, Tomas Kuliavas, and Michael Jordon with reporting these vulnerabilities.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the SquirrelMail software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   Red Hat has released a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2007-0358.html

Vendor URL:  www.squirrelmail.org/security/issue/2007-05-09 (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  3, 4, 5

Message History:   This archive entry is a follow-up to the message listed below.
May 10 2007 SquirrelMail Input Validation Holes in HTML Filter Permit Cross-Site Scripting Attacks



 Source Message Contents

Subject:  [RHSA-2007:0358-01] Moderate: squirrelmail security update


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Moderate: squirrelmail security update
Advisory ID:       RHSA-2007:0358-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2007-0358.html
Issue date:        2007-05-17
Updated on:        2007-05-17
Product:           Red Hat Enterprise Linux
Keywords:          XSS CSRF HTML IMG tag
CVE Names:         CVE-2007-1262 CVE-2007-2589 
- ---------------------------------------------------------------------

1. Summary:

A new squirrelmail package that fixes security issues is now available for
Red Hat Enterprise Linux 3, 4 and 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - noarch
Red Hat Desktop version 3 - noarch
Red Hat Enterprise Linux ES version 3 - noarch
Red Hat Enterprise Linux WS version 3 - noarch
Red Hat Enterprise Linux AS version 4 - noarch
Red Hat Enterprise Linux Desktop version 4 - noarch
Red Hat Enterprise Linux ES version 4 - noarch
Red Hat Enterprise Linux WS version 4 - noarch
RHEL Desktop Workstation (v. 5 client) - noarch
Red Hat Enterprise Linux (v. 5 server) - noarch

3. Problem description:

SquirrelMail is a standards-based webmail package written in PHP4. 

Several HTML filtering bugs were discovered in SquirrelMail.  An attacker
could inject arbitrary JavaScript leading to cross-site scripting attacks
by sending an e-mail viewed by a user within SquirrelMail. 
(CVE-2007-1262)

Squirrelmail did not sufficiently check arguments to IMG tags in HTML
e-mail messages. This could be exploited by an attacker by sending
arbitrary e-mail messages on behalf of a squirrelmail user tricked into opening
a maliciously crafted HTML e-mail message.  (CVE-2007-2589)

Users of SquirrelMail should upgrade to this erratum package, which
contains a backported patch to correct these issues.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  

This update is available via Red Hat Network.  Details on how to use 
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

5. Bug IDs fixed (http://bugzilla.redhat.com/):

239647 - CVE-2007-1262 XSS through HTML message in squirrelmail
239828 - CVE-2007-2589 CSRF through HTML message in squirrelmail

6. RPMs required:

Red Hat Enterprise Linux AS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/squirrelmail-1.4.8-6.el3.src.rpm
d5b155f024bf7f466ea748c30fa706f6  squirrelmail-1.4.8-6.el3.src.rpm

noarch:
7d794dff83c15be9d20f922c8096b3d6  squirrelmail-1.4.8-6.el3.noarch.rpm

Red Hat Desktop version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/squirrelmail-1.4.8-6.el3.src.rpm
d5b155f024bf7f466ea748c30fa706f6  squirrelmail-1.4.8-6.el3.src.rpm

noarch:
7d794dff83c15be9d20f922c8096b3d6  squirrelmail-1.4.8-6.el3.noarch.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/squirrelmail-1.4.8-6.el3.src.rpm
d5b155f024bf7f466ea748c30fa706f6  squirrelmail-1.4.8-6.el3.src.rpm

noarch:
7d794dff83c15be9d20f922c8096b3d6  squirrelmail-1.4.8-6.el3.noarch.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/squirrelmail-1.4.8-6.el3.src.rpm
d5b155f024bf7f466ea748c30fa706f6  squirrelmail-1.4.8-6.el3.src.rpm

noarch:
7d794dff83c15be9d20f922c8096b3d6  squirrelmail-1.4.8-6.el3.noarch.rpm

Red Hat Enterprise Linux AS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/squirrelmail-1.4.8-4.0.1.el4.src.rpm
0f598fa43fae1a0dd8b549b69715d940  squirrelmail-1.4.8-4.0.1.el4.src.rpm

noarch:
e184d9fc06ad637734de9d26cb7df041  squirrelmail-1.4.8-4.0.1.el4.noarch.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/squirrelmail-1.4.8-4.0.1.el4.src.rpm
0f598fa43fae1a0dd8b549b69715d940  squirrelmail-1.4.8-4.0.1.el4.src.rpm

noarch:
e184d9fc06ad637734de9d26cb7df041  squirrelmail-1.4.8-4.0.1.el4.noarch.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/squirrelmail-1.4.8-4.0.1.el4.src.rpm
0f598fa43fae1a0dd8b549b69715d940  squirrelmail-1.4.8-4.0.1.el4.src.rpm

noarch:
e184d9fc06ad637734de9d26cb7df041  squirrelmail-1.4.8-4.0.1.el4.noarch.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/squirrelmail-1.4.8-4.0.1.el4.src.rpm
0f598fa43fae1a0dd8b549b69715d940  squirrelmail-1.4.8-4.0.1.el4.src.rpm

noarch:
e184d9fc06ad637734de9d26cb7df041  squirrelmail-1.4.8-4.0.1.el4.noarch.rpm

RHEL Desktop Workstation (v. 5 client):

SRPMS:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/squirrelmail-1.4.8-4.0.1.el5.src.rpm
a8ceba3c425072d2948dd34a79c4d508  squirrelmail-1.4.8-4.0.1.el5.src.rpm

noarch:
e4deaf4a4703195e8bb95cd65c6c10d9  squirrelmail-1.4.8-4.0.1.el5.noarch.rpm

Red Hat Enterprise Linux (v. 5 server):

SRPMS:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/squirrelmail-1.4.8-4.0.1.el5.src.rpm
a8ceba3c425072d2948dd34a79c4d508  squirrelmail-1.4.8-4.0.1.el5.src.rpm

noarch:
e4deaf4a4703195e8bb95cd65c6c10d9  squirrelmail-1.4.8-4.0.1.el5.noarch.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1262
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2589
http://www.squirrelmail.org/security/issue/2007-05-09
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2007 Red Hat, Inc.
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