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SECURITY BULLETIN: Trend Micro Apex One and Worry-Free Business Security Arbitrary File Creation by Privilege Escalation Vulnerability

    • Updated:
    • 14 Oct 2021
    • Product/Version:
    • Apex One 2019
    • Apex One as a Service 2019
    • Worry-Free Business Security Advanced 10.0
    • Worry-Free Business Security Services 6.7
    • Platform:
Summary
Release Date: Oct. 4, 2021
CVE Identifier(s): CVE-2021-3848
Platform(s): Windows
CVSS 3.0 Score(s): 2.5
Severity Rating(s): Low

Trend Micro has released new Critical Patches (CPs) for Trend Micro Apex One and Worry-Free Business Security that includes a fix for an arbitrary file creation by privilege escalation vulnerability.

Details
Public

Affected Version(s)

ProductAffected Version(s)PlatformLanguage(s)
Apex One2019 (On-prem)
SaaS
WindowsEnglish
Worry-Free Business Security10.0 SP1 (on-prem)
Services (SaaS)
WindowsEnglish


Solution

Trend Micro has released the following solutions to address the issue:

ProductUpdated versionNotesPlatformAvailability
Apex One 2019CP 9645ReadmeWindowsNow Available
Apex One SaaSSept 2021 ReleaseNotesWindowsNow Available
Worry-Free Business Security10.0 SP1 Patch 2342ReadmeWindowsNow Available
Worry-Free Business Security ServicesSept 2021 Update WindowsNow Available

These are the minimum recommended version(s) of the patches and/or builds required to address the issue. Trend Micro highly encourages customers to obtain the latest version of the product if there is a newer one available than the one listed in this bulletin.

Customers are encouraged to visit Trend Micro’s Download Center to obtain prerequisite software (such as Service Packs) before applying any of the solutions above.


Vulnerability Details

CVE-2021-3848Arbitrary File Creation by Privilege Escalation Vulnerability
CVSSv3: 2.5: AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
An arbitrary file creation by privilege escalation vulnerability in Trend Micro Apex One and Trend Micro Worry-Free Business Security could allow a local attacker to create an arbitrary file with higher privileges that could lead to a denial-of-service (DoS) on affected installations.

Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.


Mitigating Factors

Exploiting these type of vulnerabilities generally require that an attacker has access (physical or remote) to a vulnerable machine. In addition to timely application of patches and updated solutions, customers are also advised to review remote access to critical systems and ensure policies and perimeter security is up-to-date.

However, even though an exploit may require several specific conditions to be met, Trend Micro strongly encourages customers to update to the latest builds as soon as possible.


Acknowledgement

Trend Micro would like to thank the following individuals for responsibly disclosing these issues and working with Trend Micro to help protect our customers:

  • Sittikorn Sangrattanapitak, Nuttakorn Tungpoonsup, and Ammarit Thongthua of Secure D Center Research Team
Premium
Internal
Partner
Rating:
Category:
Update
Solution Id:
000289183
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