Advisory Details

June 11th, 2015

Microsoft Internet Explorer ShowSaveFileDialog Protected Mode Sandbox Escape Vulnerability

CVE ID
CVSS SCORE	6.9, AV:L/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Internet Explorer
VULNERABILITY DETAILS	This vulnerability allows 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 usage of the CProtectedModeAPI::ShowSaveFileDialog API. An attacker can leverage this API to set the current working directory and allow for DLL planting. 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/MS15-056
DISCLOSURE TIMELINE	2015-02-26 - Vulnerability reported to vendor 2015-06-11 - Coordinated public release of advisory
CREDIT	Ashutosh Mehra (https://twitter.com/ashutoshmehra)

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