Advisory Details

October 19th, 2021

Trend Micro Apex One Unnecessary Privileges Local Privilege Escalation Vulnerability

CVE ID	CVE-2021-42104
CVSS SCORE	7.0, AV:L/AC:H/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 the Security Agent. The issue results from allowing an untrusted process to impersonate the client of a pipe. 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/000289229
DISCLOSURE TIMELINE	2021-05-21 - Vulnerability reported to vendor 2021-10-19 - Coordinated public release of advisory
CREDIT	Michael DePlante (@izobashi) and Simon Zuckerbraun of Trend Micro's Zero Day Initiative

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