Advisory Details

February 21st, 2018

Microsoft Edge Select Element Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-18-167
ZDI-CAN-5486

CVE ID CVE-2018-0839
CVSS SCORE 4.3, (AV:N/AC:M/Au:N/C:P/I:N/A:N)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Edge
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 specific flaw exists within the handling of HTML select elements. By manipulating a document's elements an attacker can trigger a read past the end of an allocated array. An attacker can leverage this vulnerability to disclose information 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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0839
DISCLOSURE TIMELINE
  • 2017-12-07 - Vulnerability reported to vendor
  • 2018-02-21 - Coordinated public release of advisory
  • 2018-02-21 - Advisory Updated
CREDIT Dmitri Kaslov of Telspace Systems
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