Advisory Details

August 10th, 2015

Microsoft Internet Explorer add-on Installer Sandbox Escape Vulnerability

ZDI-15-377
ZDI-CAN-2874

CVE ID CVE-2015-1743
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 remote attackers to escape Enhanced 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 usage of the add-on installer. An attacker can bypass checks within the add-on installer with special paths and junction points to achieve medium-integrity code execution under the context of the user.

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
  • 2015-04-23 - Vulnerability reported to vendor
  • 2015-08-10 - Coordinated public release of advisory
CREDIT Thomas Vanhoutte
BACK TO ADVISORIES