ZDI-12-098 : AOL Products dnUpdater ActiveX Uninitialized Pointer Remote Code Execution Vulnerability

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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

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