Affected Version(s)
| Product | Affected Version(s) | Platform | Language(s) |
|---|---|---|---|
| Apex One | 2019 (On-prem) SaaS | Windows | English |
| Worry-Free Business Security | 10.0 SP1 (on-prem) Services (SaaS) | Windows | English |
Solution
Trend Micro has released the following solutions to address the issue:
| Product | Updated version | Notes | Platform | Availability |
|---|---|---|---|---|
| Apex One 2019 | CP 9645 | Readme | Windows | Now Available |
| Apex One SaaS | Sept 2021 Release | Notes | Windows | Now Available |
| Worry-Free Business Security | 10.0 SP1 Patch 2342 | Readme | Windows | Now Available |
| Worry-Free Business Security Services | Sept 2021 Update | Windows | Now 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-2021-3848: Arbitrary File Creation by Privilege Escalation VulnerabilityCVSSv3: 2.2: 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