Affected Version(s)

Solution

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

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.

* Please note that some of the vulnerabilities listed below and some older ones were addressed in earlier patches (WFBS) and monthly SaaS updates (WFBSS), but Trend Micro recommends that Worry-Free Business Security customers are always on the latest available cumulative build to ensure all issues and vulnerabilities are properly resolved.

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-2022-44649:  Unauthorized Change Prevention Service Out-of-Bounds Access Local Privilege Escalation Vulnerability 
ZDI-22-1619 (Reference)
CVSSv3: 7.0: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

An out-of-bounds access vulnerability in the Unauthorized Change Prevention service of Trend Micro Worry-Free Business Security and Worry-Free Business Security Services could allow a local attacker to elevate privileges 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.

CVE-2022-44650:  Unauthorized Change Prevention Service Memory Corruption Local Privilege Escalation Vulnerability 
ZDI-22-1616 (Reference)
CVSSv3: 7.0: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

A memory corruption vulnerability in the Unauthorized Change Prevention service of Trend Micro Worry-Free Business Security and Worry-Free Business Security Services could allow a local attacker to elevate privileges 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.

CVE-2022-44654:  Module Missing /SAFESEH Memory Protection Mechanism 
CVSSv3: 6.1: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected builds of Trend Micro Worry-Free Business Security and Worry-Free Business Security Services contain a monitor engine component that is complied without the /SAFESEH memory protection mechanism which helps to monitor for malicious payloads. The affected component's memory protection mechanism has been updated to enhance product security.

CVE-2022-45798:  Damage Cleanup Engine Link Following Local Privilege Escalation Vulnerability 
ZDI-22-1665 (Reference)
CVSSv3: 7.8: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

A link following vulnerability in the Damage Cleanup Engine component of Trend Micro Worry-Free Business Security and Worry-Free Business Security Services could allow a local attacker to escalate privileges by creating a symbolic link and abusing the service to delete a file.

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:

• CVE-2022-44649, CVE-2022-44650: Simon Zuckerbraun of Trend Micro's Zero Day Initiative
• CVE-2022-44654:  Shadi Habbal of TÜV Rheinland i-sec GmbH
• CVE-2022-45798:  Abdelhamid Naceri working with Trend Micro's Zero Day Initiative

External Reference(s)

• ZDI-22-1619
• ZDI-22-1616
• ZDI-22-1665