Check Point Advisories

Internet Explorer Improper Ref Counting Use After Free (MS12-077; CVE-2012-4787)

Check Point Reference: CPAI-2012-1252
Date Published: 11 Dec 2012
Severity: Critical
Last Updated: Wednesday 29 January, 2025
Source: CVE-2012-4787
Protection Provided by:

Security Gateway
R70

  • R71
  • R75

    		•
    Who is Vulnerable? Internet Explorer 9 for Windows Vista Service Pack 2
    Internet Explorer 9 for Windows Vista x64 Edition Service Pack 2
    Internet Explorer 9 for Windows Server 2008 for 32-bit Systems Service Pack 2
    Internet Explorer 9 for Windows Server 2008 for x64-based Systems Service Pack 2
    Internet Explorer 9 for Windows 7 for 32-bit Systems
    Internet Explorer 9 for Windows 7 for 32-bit Systems Service Pack 1
    Internet Explorer 9 for Windows 7 for x64-based Systems
    Internet Explorer 9 for Windows 7 for x64-based Systems Service Pack 1
    Internet Explorer 9 for Windows Server 2008 R2 for x64-based Systems
    Internet Explorer 9 for Windows Server 2008 R2 for x64-based Systems Service Pack 1
    Internet Explorer 10
    Internet Explorer 10 in Windows 8 for 32-bit Systems
    Internet Explorer 10 in Windows 8 for 64-bit Systems
    Internet Explorer 10 in Windows Server 2012
    Internet Explorer 10 in Windows RT
    Vulnerability Description A remote code execution vulnerability has been reported in Internet Explorer.
    Update/Patch AvaliableApply patches from: MS12-077
    Vulnerability DetailsThe vulnerability is due to an error in the way Internet Explorer accesses an object that has not been correctly initialized or has been deleted. A remote attacker can exploit this issue by enticing a target user to open a specially crafted web page. Successful exploitation would allow an attacker to take complete control of the target.

    Protection Overview

    This protection will detect and block attempts to open a specially crafted HTML page.

    In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, Protection tab and select the version of your choice.

    Security Gateway R75 / R71 / R70

    1. In the IPS tab, click Protections and find the Internet Explorer Improper Ref Counting Use After Free (MS12-077) protection using the Search tool and Edit the protection's settings.
    2. Install policy on all modules.

    SmartView Tracker will log the following entries:
    Attack Name: Web Client Enforcement Violation
    Attack Information: Internet Explorer Improper Ref Counting Use After Free (MS12-077)

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