Advisory Details

August 9th, 2016

Microsoft Edge GetRefererUrl Use-After-Free Information Disclosure Vulnerability

ZDI-16-452
ZDI-CAN-3751

CVE ID CVE-2016-3326
CVSS SCORE 4.3, (AV:N/AC:M/Au:N/C:P/I:N/A:N)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Edge
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 24738. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Microsoft Edge. 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 Microsoft Edge constructs Referer headers in HTTP requests. By manipulating a document's elements an attacker can force a string in memory to be reused after it has been freed. As a result, unintended information will be included in the Referer header. An attacker can leverage this in conjunction with other vulnerabilities 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/library/security/MS16-095
DISCLOSURE TIMELINE
  • 2016-05-05 - Vulnerability reported to vendor
  • 2016-08-09 - Coordinated public release of advisory
CREDIT Simon Zuckerbraun - Trend Micro Zero Day Initiative
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