CVE-2020-24557 Trend Micro Apex One, OfficeScan, and Worry-Free Business Security: login or permission bypass
In plain words: A door that should be locked is not: part of the system can be reached without a valid login or permission. The attacker gets in as a user or administrator without knowing a password.
Confirmed exploited by CISA on · US federal patch deadline May 3, 2022
What to do
- Install Trend Micro's security update for Apex One, OfficeScan, and Worry-Free Business Security. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic updates for the operating system and for Office, PDF and archive apps.
- Be careful with unexpected attachments — documents, .zip/.rar files and shortcuts are common bait.
- Use a normal (non-admin) account day to day and keep built-in protection like Microsoft Defender on.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Your files, saved passwords and accounts. Many of these let a program that is already running gain full administrator control.
The details
- Official name
- Trend Micro Multiple Products Improper Access Control Vulnerability
- Product
- Trend Micro Apex One, OfficeScan, and Worry-Free Business Security
- CISA description
- Trend Micro Apex One, OfficeScan, and Worry-Free Business Security on Microsoft Windows contain an improper access control vulnerability that may allow an attacker to manipulate a particular product folder to disable the security temporarily, abuse a specific Windows function, and attain privilege escalation.
- Type of flaw
- Login or permission bypass
- Confirmed exploited
- Nov 3, 2021
- US federal patch deadline
- May 3, 2022
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Answering about CVE-2020-24557 ·
Questions about CVE-2020-24557
Is CVE-2020-24557 being exploited?
Yes. CISA added CVE-2020-24557 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2020-24557?
Install Trend Micro's security update for Apex One, OfficeScan, and Worry-Free Business Security. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic updates for the operating system and for Office, PDF and archive apps.
Am I affected by CVE-2020-24557?
Only if you use Trend Micro Apex One, OfficeScan, and Worry-Free Business Security. This one is aimed at devices or apps of the kind people own.