Advisory Details

February 21st, 2018

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

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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