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Vulnerability Details : CVE-2012-4969

Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.
Publish Date : 2012-09-18 Last Update Date : 2017-11-21
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- CVSS Scores & Vulnerability Types

CVSS Score
9.3
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID CWE id is not defined for this vulnerability

- Related OVAL Definitions

Title Definition Id Class Family
execCommand Use After Free Vulnerability - MS12-063 oval:org.mitre.oval:def:15729 windows
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2012-4969

# Product Type Vendor Product Version Update Edition Language
1 Application Microsoft Internet Explorer 6 Version Details Vulnerabilities
2 Application Microsoft Internet Explorer 7 Version Details Vulnerabilities
3 Application Microsoft Internet Explorer 8 Version Details Vulnerabilities
4 Application Microsoft Internet Explorer 9 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Microsoft Internet Explorer 4

- References For CVE-2012-4969

http://www.us-cert.gov/cas/techalerts/TA12-265A.html
CERT TA12-265A
http://www.securitytracker.com/id?1027538
SECTRACK 1027538
http://www.us-cert.gov/cas/techalerts/TA12-262A.html
CERT TA12-262A
http://www.securityweek.com/new-internet-explorer-zero-day-being-exploited-wild
http://www.us-cert.gov/cas/techalerts/TA12-255A.html
CERT TA12-255A
http://dev.metasploit.com/redmine/projects/framework/repository/entry/modules/exploits/windows/browser/ie_execcommand_uaf.rb
http://www.kb.cert.org/vuls/id/480095
CERT-VN VU#480095
http://eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yet/
http://technet.microsoft.com/en-us/security/advisory/2757760
Microsoft Advisory http://technet.microsoft.com/security/advisory/2757760 Microsoft Security Advisory (2757760): Vulnerability in Internet Explorer Could Allow Remote Code Execution - Version: 2.0 Revision Note: V2.0 (September 21, 2012): Advisory updated to reflect publication of security bulletin. Summary: Microsoft has completed the investigation into public reports of this vulnerability. We have issued MS12-063 to address this issue. For more information about this issue, including download links for an available security update, please review MS12-063. The vulnerability addressed is the execCommand Use After Free Vulnerability - CVE-2012-4969.Release Date:2012-09-21
http://blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerability-0day_en/

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)

- Metasploit Modules Related To CVE-2012-4969

MS12-063 Microsoft Internet Explorer execCommand Use-After-Free Vulnerability
This module exploits a vulnerability found in Microsoft Internet Explorer (MSIE). When rendering an HTML page, the CMshtmlEd object gets deleted in an unexpected manner, but the same memory is reused again later in the CMshtmlEd::Exec() function, leading to a use-after-free condition. Please note that this vulnerability has been exploited in the wild since Sep 14 2012. Also note that presently, this module has some target dependencies for the ROP chain to be valid. For WinXP SP3 with IE8, msvcrt must be present (as it is by default). For Vista or Win7 with IE8, or Win7 with IE9, JRE 1.6.x or below must be installed (which is often the case).
Module type : exploit Rank : good Platforms : Windows


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