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Category:   Application (Multimedia)  >   Adobe Flash Player Vendors:   Adobe Systems Incorporated
(Red Hat Issues Fix) Adobe Flash Player Invalid Object Reference Bug Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1021766
SecurityTracker URL:
CVE Reference:   CVE-2009-0520   (Links to External Site)
Date:  Feb 26 2009
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to
Description:   A vulnerability was reported in Adobe Flash Player. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted Flash file that, when loaded by the target user, will reference a deleted object and execute arbitrary code on the target system. The code will run with the privileges of the target user.

The vendor was notified on August 25, 2008.

Javier Vicente Vallejo reported this vulnerability via iDefense.

[Editor's note: The vendor describes this vulnerability as a buffer overflow.]

Impact:   A remote user can create Flash content that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   Red Hat has released a fix.

The Red Hat advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error, Boundary error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  5

Message History:   This archive entry is a follow-up to the message listed below.
Feb 24 2009 Adobe Flash Player Invalid Object Reference Bug Lets Remote Users Execute Arbitrary Code

 Source Message Contents

Subject:  [RHSA-2009:0332-01] Critical: flash-plugin security update

Hash: SHA1

                   Red Hat Security Advisory

Synopsis:          Critical: flash-plugin security update
Advisory ID:       RHSA-2009:0332-01
Product:           Red Hat Enterprise Linux Extras
Advisory URL:
Issue date:        2009-02-25
CVE Names:         CVE-2009-0519 CVE-2009-0520 CVE-2009-0521 

1. Summary:

An updated Adobe Flash Player package that fixes several security issues is
now available for Red Hat Enterprise Linux 5 Supplementary.

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

2. Relevant releases/architectures:

RHEL Desktop Supplementary (v. 5 client) - i386, x86_64
RHEL Supplementary (v. 5 server) - i386, x86_64

3. Description:

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

Multiple input validation flaws were found in the way Flash Player
displayed certain SWF (Shockwave Flash) content. An attacker could use
these flaws to create a specially-crafted SWF file that could cause
flash-plugin to crash, or, possibly, execute arbitrary code when the victim
loaded a page containing the specially-crafted SWF content. (CVE-2009-0520,

It was discovered that Adobe Flash Player had an insecure RPATH (runtime
library search path) set in the ELF (Executable and Linking Format) header.
A local user with write access to the directory pointed to by RPATH could
use this flaw to execute arbitrary code with the privileges of the user
running Adobe Flash Player. (CVE-2009-0521)

All users of Adobe Flash Player should install this updated package, which
upgrades Flash Player to version

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

5. Bugs fixed (

487141 - CVE-2009-0519 flash-plugin: Input validation flaw (DoS)
487142 - CVE-2009-0520 flash-plugin: Buffer overflow (arbitrary code execution) via crafted SWF file.
487144 - CVE-2009-0521 flash-plugin: Linux-specific information disclosure (privilege escalation)

6. Package List:

RHEL Desktop Supplementary (v. 5 client):



RHEL Supplementary (v. 5 server):



These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from

7. References:

8. Contact:

The Red Hat security contact is <>.  More contact
details at

Copyright 2009 Red Hat, Inc.
Version: GnuPG v1.4.4 (GNU/Linux)


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