Advisory Details

August 31st, 2020

Trend Micro Apex One Hard Link Privilege Escalation Vulnerability

ZDI-20-1093
ZDI-CAN-10513

CVE ID CVE-2020-24556
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 the ApexOne Security Agent. By creating a hard link, an attacker can abuse the service to overwrite the contents of a chosen file. An attacker can leverage this vulnerability to escalate privileges and execute 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/000263632
DISCLOSURE TIMELINE
  • 2020-03-16 - Vulnerability reported to vendor
  • 2020-08-31 - Coordinated public release of advisory
CREDIT @Kharosx0
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