Advisory Details

January 29th, 2021

Trend Micro Apex One TmCCSF Out-Of-Bounds Write Privilege Escalation Vulnerability

CVE ID	CVE-2021-25249
CVSS SCORE	7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Trend Micro
AFFECTED PRODUCTS	Apex One
VULNERABILITY DETAILS	This vulnerability allows local attackers to escalate privileges on affected installations of Trend Micro Apex One. 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 TmCCSF.exe. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.
ADDITIONAL DETAILS	Trend Micro has issued an update to correct this vulnerability. More details can be found at: https://success.trendmicro.com/solution/000284202
DISCLOSURE TIMELINE	2020-09-30 - Vulnerability reported to vendor 2021-01-29 - Coordinated public release of advisory
CREDIT	Lynn

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