Advisory Details

April 20th, 2018

Foxit Reader XFA Button resetData Use-After-Free Remote Code Execution Vulnerability

CVE ID	CVE-2018-9957
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Foxit
AFFECTED PRODUCTS	Reader
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader. 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 XFA Button elements. When parsing arguments passed to the resetData method, the process does not properly validate the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code under the context of the current process.
ADDITIONAL DETAILS	Foxit has issued an update to correct this vulnerability. More details can be found at: https://www.foxitsoftware.com/support/security-bulletins.php
DISCLOSURE TIMELINE	2018-01-30 - Vulnerability reported to vendor 2018-04-20 - Coordinated public release of advisory 2018-04-20 - Advisory Updated
CREDIT	Steven Seeley (mr_me) of Source Incite

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