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Category:   Application (Multimedia)  >   Helix Player Vendors:
Helix Player Buffer Overflows in Processing .rm Files and Skin Files Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1015186
SecurityTracker URL:
CVE Reference:   CVE-2005-2629   (Links to External Site)
Date:  Nov 11 2005
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 1.0.6
Description:   Several vulnerabilities were reported in Helix Player. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a RealMedia (.rm) movie file with a specially crafted first data packet to trigger a stack overflow and execute arbitrary code [CVE-2005-2629].

The vendor was notified of this vulnerability on May 28, 2005.

eEye Digital Security discovered this vulnerability.

A remote user can create a specially crafted skin file that, when processed by the plyaer, will trigger a stack overflow and execute arbitrary code.

NGS Software discovered this vulnerability.

Impact:   A remote user can cause arbitrary code to be executed on the target user's system. The code will run with the privileges of the target user.
Solution:   The vendor has issued a fixed version (1.0.6), available at:

Cause:   Boundary error
Underlying OS:  Linux (Any)

Message History:   None.

 Source Message Contents

Subject:  [Full-disclosure] [EEYEB-20050510] - RealPlayer Data Packet Stack

RealPlayer Data Packet Stack Overflow

Release Date:
November 10, 2005

Date Reported:
May 28, 2005

High (Remote Code Execution)


Systems Affected:
RealPlayer 10.5 (
RealPlayer 10
RealOne Player v2
RealOne Player v1
RealPlayer 8
RealPlayer Enterprise
RealPlayer 10
RealPlayer 10 (10.0.0 - 5)
Helix Player (10.0.0 - 5)

eEye Digital Security has discovered a critical vulnerability in
RealPlayer. The vulnerability allows a remote attacker to reliably
overwrite stack memory with arbitrary data and execute arbitrary code in
the context of the user who executed the player.

This specific flaw exists in the first data packet contained in a Real
Media file. By specially crafting a malformed .rm movie file, a direct
stack overwrite is triggered, and reliable code execution is then

Technical Details:
The vulnerability is triggered by setting the application specific
length field of the [data packet + 1] to 0x80 - 0xFF this will cause a
stack overflow.
The value is sign-extended and passed as the length to memcpy.

Retina Network Security Scanner has been updated to identify this
Blink End Point Protection proactively protects against this

Vendor Status:
RealNetworks has released a patch for this vulnerability. The patch is
available via the "Check for Update" menu item under Tools on the
RealPlayer menu bar or from

Karl Lynn

Related Links:
This advisory has been assigned the following ID numbers;

OSVDB ID: 18822
CVE ID: CAN-2005-2629

Brett Moore, Mark Dowd, Paul Gese @ RealNetworks, Mike Schiffman, AJREZ,
Luke, Derek "TEX" Soeder, Andre Audits, "The Claw", and Dug Song. 

Copyright (c) 1998-2005 eEye Digital Security
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