Advisory Details

October 1st, 2020

Trend Micro Antivirus for Mac Symbolic Link Privilege Escalation Vulnerability

ZDI-20-1236
ZDI-CAN-10941

CVE ID CVE-2020-25776
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 Antivirus for Mac
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Trend Micro Antivirus for Mac. 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 iTISPlugin module. By creating a symbolic link, an attacker can abuse the product to loosen permissions on a local file. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of root.

ADDITIONAL DETAILS Trend Micro has issued an update to correct this vulnerability. More details can be found at:
https://helpcenter.trendmicro.com/en-us/article/TMKA-09924
DISCLOSURE TIMELINE
  • 2020-06-02 - Vulnerability reported to vendor
  • 2020-10-01 - Coordinated public release of advisory
CREDIT Cees Elzinga from Danish Cyber Defence
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