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Category:   Application (Multimedia)  >   Adobe Flash Vendors:   Adobe Systems Incorporated
(Red Hat Issues Fix) Adobe Flash Bug Lets Remote Users Hijack User Clicks
SecurityTracker Alert ID:  1021175
SecurityTracker URL:  http://securitytracker.com/id/1021175
CVE Reference:   CVE-2008-4503   (Links to External Site)
Date:  Nov 12 2008
Impact:   Disclosure of user information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.0.124.0 and prior versions
Description:   A vulnerability was reported in Adobe Flash Player. A remote user can hijack the target user's click actions.

A remote user can create specially crafted Flash content that, when loaded by the target user, will hijack the target user's click actions. This can be exploited to cause links to load that are different links than those displayed to the target user. For example, this can be exploited to access the target user's camera and microphone without the target user's knowledge.

A demonstration exploit is available at:

http://blog.guya.net/2008/10/07/malicious-camera-spying-using-clickjacking/

A video describing the demonstration exploit is available at:

http://www.youtube.com/watch?v=gxyLbpldmuU

Robert Hansen of SecTheory and Jeremiah Grossman of WhiteHat Security, Eduardo Vela, Matthew Mastracci of DotSpots, and Liu Die Yu reported this vulnerability.

[Editor's note: Several web browsers are vulnerable to similar clickjacking attacks. This alert addresses Flash Player only and just some of the variants of clickjacking.]
Impact:   A remote user can hijack the target user's click actions.
Solution:   Red Hat has released a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2008-0980.html
Vendor URL:  www.adobe.com/support/security/bulletins/apsb08-18.html (Links to External Site)
Cause:   Access control error, State error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Oct 8 2008 Adobe Flash Bug Lets Remote Users Hijack User Clicks


 Source Message Contents
Date:  Wed, 12 Nov 2008 13:06:37 -0500
Subject:  [RHSA-2008:0980-02] Important: flash-plugin security update


-----BEGIN PGP SIGNED MESSAGE-----
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: flash-plugin security update
Advisory ID:       RHSA-2008:0980-02
Product:           Red Hat Enterprise Linux Extras
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2008-0980.html
Issue date:        2008-11-12
CVE Names:         CVE-2007-4324 CVE-2007-6243 CVE-2008-3873 
                   CVE-2008-4401 CVE-2008-4503 CVE-2008-4818 
                   CVE-2008-4819 CVE-2008-4823 CVE-2008-4822 
                   CVE-2008-4821 
=====================================================================

1. Summary:

An updated Adobe Flash Player package that fixes several security issues is
now available for Red Hat Enterprise Linux 3 and 4 Extras.

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

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 Extras - i386
Red Hat Desktop version 3 Extras - i386
Red Hat Enterprise Linux ES version 3 Extras - i386
Red Hat Enterprise Linux WS version 3 Extras - i386
Red Hat Enterprise Linux AS version 4 Extras - i386
Red Hat Desktop version 4 Extras - i386
Red Hat Enterprise Linux ES version 4 Extras - i386
Red Hat Enterprise Linux WS version 4 Extras - i386

3. Description:

The flash-plugin package contains a Firefox-compatible Adobe Flash Player
Web browser plug-in.

A flaw was found in the way Adobe Flash Player wrote content to the
clipboard. A malicious SWF (Shockwave Flash) file could populate the
clipboard with a URL that could cause the user to accidentally or
mistakenly load an attacker-controlled URL. (CVE-2008-3873)

A flaw was found with Adobe's ActionScript scripting language which allowed
Flash scripts to initiate file uploads and downloads without user
interaction. ActionScript's FileReference.browse and FileReference.download
method calls can now only be initiated via user interaction, such as
through mouse-clicks or key-presses on the keyboard. (CVE-2008-4401)

A flaw was found in Adobe Flash Player's display of Settings Manager
content. A malicious SWF file could trick the user into unintentionally or
mistakenly clicking a link or a dialog which could then give the malicious
SWF file permission to access the local machine's camera or microphone.
(CVE-2008-4503)

Flaws were found in the way Flash Player restricted the interpretation and
usage of cross-domain policy files. A remote attacker could use Flash
Player to conduct cross-domain and cross-site scripting attacks
(CVE-2007-4324, CVE-2007-6243). This update provides enhanced fixes for
these issues.

Flash Player contains a flaw in the way it interprets HTTP response
headers. An attacker could use this flaw to conduct a cross-site scripting
attack against the user running Flash Player. (CVE-2008-4818)

A flaw was found in the way Flash Player handles the ActionScript
attribute. A malicious site could use this flaw to inject arbitrary HTML
content, confusing the user running the browser. (CVE-2008-4823)

A flaw was found in the way Flash Player interprets policy files. It was
possible to bypass a non-root domain policy, possibly allowing a malicious
site to access data in a different domain. (CVE-2008-4822)

A flaw was found in how Flash Player's jar: protocol handler interacts with
Mozilla. A malicious flash application could use this flaw to disclose
sensitive information. (CVE-2008-4821)

Updated Flash Player also extends mechanisms to help prevent an attacker
from executing a DNS rebinding attack. (CVE-2008-4819)

All users of Adobe Flash Player should upgrade to this updated package,
which contains Flash Player version 9.0.151.0.

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. Bugs fixed (http://bugzilla.redhat.com/):

252292 - CVE-2007-4324 Flash movie can determine whether a TCP port is open
440664 - CVE-2007-6243 Flash Player cross-domain and cross-site scripting flaws
465736 - CVE-2008-3873 flash: clipboard hijack attack
466154 - CVE-2008-4401 flash-plugin: upload/download user interaction
466344 - CVE-2008-4503 Adobe Flash Player clickjacking
470116 - CVE-2008-4818 Flash Player XSS
470123 - CVE-2008-4819 Flash Player DNS rebind attack
470128 - CVE-2008-4823 Flash Player HTML injection flaw
470130 - CVE-2008-4822 Flash Player policy file interpretation flaw
470131 - CVE-2008-4821 Flash Player jar: protocol handler

6. Package List:

Red Hat Enterprise Linux AS version 3 Extras:

i386:
flash-plugin-9.0.151.0-1.el3.with.oss.i386.rpm

Red Hat Desktop version 3 Extras:

i386:
flash-plugin-9.0.151.0-1.el3.with.oss.i386.rpm

Red Hat Enterprise Linux ES version 3 Extras:

i386:
flash-plugin-9.0.151.0-1.el3.with.oss.i386.rpm

Red Hat Enterprise Linux WS version 3 Extras:

i386:
flash-plugin-9.0.151.0-1.el3.with.oss.i386.rpm

Red Hat Enterprise Linux AS version 4 Extras:

i386:
flash-plugin-9.0.151.0-1.el4.i386.rpm

Red Hat Desktop version 4 Extras:

i386:
flash-plugin-9.0.151.0-1.el4.i386.rpm

Red Hat Enterprise Linux ES version 4 Extras:

i386:
flash-plugin-9.0.151.0-1.el4.i386.rpm

Red Hat Enterprise Linux WS version 4 Extras:

i386:
flash-plugin-9.0.151.0-1.el4.i386.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-2007-4324
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6243
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3873
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4401
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4503
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4818
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4819
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4823
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4822
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4821
http://adobe.com/products/flashplayer
http://www.redhat.com/security/updates/classification/#important
http://www.adobe.com/support/security/bulletins/apsb08-20.html

8. Contact:

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

Copyright 2008 Red Hat, Inc.
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