Advisory Details

August 11th, 2015

Microsoft Internet Explorer HelpPane Sandbox Bypass Vulnerability

CVE ID	CVE-2015-2454
CVSS SCORE	4.4, AV:L/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 escape Protected Mode 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 HelpPane executable. The issue lies in the validation of the integrity level of the COM client, which is performed with a comparison against the integrity level of the desktop's shell. An attacker can leverage this vulnerability to execute code under the context of the user at medium integrity.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://technet.microsoft.com/library/security/MS15-080
DISCLOSURE TIMELINE	2015-05-07 - Vulnerability reported to vendor 2015-08-11 - Coordinated public release of advisory
CREDIT	Ashutosh Mehra (https://twitter.com/ashutoshmehra)

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