Advisory Details

May 4th, 2018

Trend Micro Maximum Security tmusa Time-Of-Check Time-Of-Use Privilege Escalation Vulnerability

CVE ID	CVE-2018-6236
CVSS SCORE	6.9, AV:L/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Trend Micro
AFFECTED PRODUCTS	Maximum Security
VULNERABILITY DETAILS	This vulnerability allows local attackers to escalate privileges on vulnerable installations of Trend Micro Maximum Security. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the processing of IOCTL 0x222813 by the tmusa driver. The code is subject to a time-of-check/time-of-use race condition when processing data from the user. An attacker can leverage this vulnerability to escalate privileges to kernel.
ADDITIONAL DETAILS	Trend Micro has issued an update to correct this vulnerability. More details can be found at: https://esupport.trendmicro.com/en-us/home/pages/technical-support/1119591.aspx
DISCLOSURE TIMELINE	2018-01-02 - Vulnerability reported to vendor 2018-05-04 - Coordinated public release of advisory 2018-05-04 - Advisory Updated
CREDIT	Anonymous

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