Microsoft Internet Explorer BubbleBecomeCurrent Use-After-Free Remote Code Execution Vulnerability

July 26th, 2013
ZDI-13-174 ZDI-CAN-1838

CVE ID

CVE-2013-3147

CVSS Score

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

Affected Vendors

Microsoft

Affected Products

Internet Explorer

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. 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 onbeforeeditfocus event. This event object can be freed and referenced by BubbleBecomeCurrent afterwards. An attacker can leverage this situation to execute code under the context of the user running the browser.

Additional Details

Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://technet.microsoft.com/en-us/security/bulletin/ms13-055

Disclosure Timeline

  • 2013-04-16 - Vulnerability reported to vendor
  • 2013-07-26 - Coordinated public release of advisory

Credit

Aniway.Anyway@gmail.com

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