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Category:   Application (Instant Messaging/IRC/Chat)  >   ICQ Vendors:   America Online, Inc.
AOL ICQ DownloadAgent() Function Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1017163
SecurityTracker URL:
CVE Reference:   CVE-2006-5650   (Links to External Site)
Date:  Nov 6 2006
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.1
Description:   A vulnerability was reported in ICQ. A remote user can execute arbitrary code on the target user's system.

A remote user can send a specially crafted URI that, when received by the target user, will execute arbitrary code on the target user's system. The code will run with the privileges of the target user. No user interaction is required.

The vulnerability resides in the DownloadAgent function of the ICQPhone.SipxPhoneManager ActiveX control.

The control has the following CLSID:


This can be exploited via an ICQ avatar.

The vendor was notified on September 20,2006.

Peter Vreugdenhil discovered this vulnerability. TippingPoint reported this vulnerability.

The original advisory is available at:

Impact:   A remote user can execute arbitrary code on the target user's system.
Solution:   The vendor issued a fix on October 31, 2006, available automatically when connecting to the ICQ service.
Vendor URL: (Links to External Site)
Cause:   Not specified
Underlying OS:  Windows (Any)

Message History:   None.

 Source Message Contents

Subject:  [Full-disclosure] ZDI-06-037: America Online ICQ ActiveX Control

ZDI-06-037: America Online ICQ ActiveX Control Code Execution
November  6, 2006

-- CVE ID:

-- Affected Vendor:
America Online

-- Affected Products:
America Online ICQ 5.1

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since October 31, 2006 by Digital Vaccine protection
filter ID 4725. For further product information on the TippingPoint IPS: 

-- Vulnerability Details:
This vulnerability allows attackers to execute arbitrary code on
vulnerable installations of AOL ICQ. User interaction is not required
to exploit this vulnerability.

The specific flaw exists in the DownloadAgent function of the
ICQPhone.SipxPhoneManager ActiveX control with the following CLSID:


The vulnerable function takes a single URI argument of a file to
download and execute under the context of the running user. A malicious
ICQ avatar can be used as an exploitation vector, allowing attackers to
exploit this vulnerability by simply messaging a target ICQ user.

-- Vendor Response:
AOL has issued an update to correct this vulnerability on 10/31/2006.
The update is automatically applied once connected to the ICQ service.

-- Disclosure Timeline:
2006.09.20 - Vulnerability reported to vendor
2006.10.31 - Digital Vaccine released to TippingPoint customers
2006.11.06 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by Peter Vreugdenhil.

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, a division of 3Com, The Zero Day Initiative
(ZDI) represents a best-of-breed model for rewarding security
researchers for responsibly disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

The ZDI is unique in how the acquired vulnerability information is used.
3Com does not re-sell the vulnerability details or any exploit code.
Instead, upon notifying the affected product vendor, 3Com provides its
customers with zero day protection through its intrusion prevention
technology. Explicit details regarding the specifics of the
vulnerability are not exposed to any parties until an official vendor
patch is publicly available. Furthermore, with the altruistic aim of
helping to secure a broader user base, 3Com provides this vulnerability
information confidentially to security vendors (including competitors)
who have a vulnerability protection or mitigation product.

Full-Disclosure - We believe in it.
Hosted and sponsored by Secunia -


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