Advisory Details

January 6th, 2022

Trend Micro Apex One Link Following Privilege Escalation Vulnerability

ZDI-22-013
ZDI-CAN-13365

CVE ID CVE-2021-45231
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 Security Agent. 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 Real-time Scan Service. By creating a symbolic link, an attacker can abuse the service to overwrite a file. 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/000289996
DISCLOSURE TIMELINE
  • 2021-06-16 - Vulnerability reported to vendor
  • 2022-01-06 - Coordinated public release of advisory
CREDIT Abdelhamid Naceri (halov)
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