Advisory Details

November 19th, 2014

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

CVE ID	CVE-2014-4143
CVSS SCORE	6.8, AV:N/AC:M/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 vulnerability relates to how Internet Explorer manages the lifetime of CSecurityContext objects. By manipulating a document's elements an attacker can force a CSecurityContext object in memory to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://technet.microsoft.com/en-us/library/security/ms14-065.aspx
DISCLOSURE TIMELINE	2014-07-07 - Vulnerability reported to vendor 2014-11-19 - Coordinated public release of advisory
CREDIT	s3tm3m

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