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ZDI-12-098 : AOL Products dnUpdater ActiveX Uninitialized Pointer Remote
Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-098
June 21, 2012

- -- CVE ID:


- -- CVSS:
7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P

- -- Affected Vendors:

America Online

- -- Affected Products:

America Online AOL Deskbar


- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 12280.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

- -- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of America Online's Toolbar, Desktop, IM, and
winamp. User interaction is required to exploit this vulnerability in that
the target must visit a malicious page or open a malicious file.

The specific flaw exists within the dnUpdater ActiveX Control. When
initializing the ActiveX control object, dnu.exe assumes the 5th argument
being used for the Init() method, to be a legitimate pointer to a function.
This vulnerability can be leveraged to execute code under the context of
the user.

- -- Vendor Response:
America Online has issued an update to correct this vulnerability. More
details can be found at:
http://client.web.aol.com/toolbarfiles/Prod/downloads/downloadupdater/dnupd
atersetup.exe


- -- Disclosure Timeline:
2011-10-21 - Vulnerability reported to vendor
2012-06-21 - Coordinated public release of advisory


- -- Credit:
This vulnerability was discovered by:

* Andrea Micalizzi aka rgod

- -- About the Zero Day Initiative (ZDI):
Established by TippingPoint, 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:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint 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
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mitigation product.

Our vulnerability disclosure policy is available online at:

    http://www.zerodayinitiative.com/advisories/disclosure_policy/

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