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SECURITY BULLETIN: October 14, 2021, Security Bulletin for Trend Micro Apex One and Apex One as a Service

    • Updated:
    • 14 Oct 2021
    • Product/Version:
    • Apex One 2019
    • Apex One as a Service 2019
    • Platform:
Summary
Release Date: October 14, 2021
CVE Identifier(s): CVE-2021-23139, CVE-2021-42011 through 42012, CVE-2021-42101 through 42108
Platform(s): Windows
CVSS 3.0 Score(s): 3.5 – 7.8
Severity Rating(s): Low - High

Trend Micro has released new patches for Trend Micro Apex One (On Premise) and Apex One as a Service (SaaS) that resolve several vulnerabilities listed below.

Details
Public

Affected Version(s)

ProductAffected Version(s)PlatformLanguage(s)
Apex One2019 (On-prem)WindowsEnglish
Apex OneSaaSWindowsEnglish


Solution

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

ProductUpdated versionNotesPlatformAvailability
Apex OneCP 9645ReadmeWindowsNow Available
Apex OneSaaS September 2021 Monthly PatchNotesWindowsNow 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-2021-42104 through 42108Unnecessary Privileges Local Privilege Escalation Vulnerabilities
CVSSv3: 7.8: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (CVE-2021-42104 through 42107)
CVSSv3: 7.3: AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H (CVE-2021-42108)
Unnecessary privilege vulnerabilities in Trend Micro Apex One and Apex One as a Service could allow a local attacker to escalate 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-2021-42101 through 42103Uncontrolled Search Path Element Privilege Escalation Vulnerabilities
CVSSv3: 7.0: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H (CVE-2021-42101 and 42102)
CVSSv3 7.8: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (CVE-2021-42103)
Uncontrolled search path element vulnerabilities in Trend Micro Apex One and Apex One as a Service could allow a local attacker to escalate 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-2021-42011Incorrect Permission Assignment Privilege Escalation Vulnerability
CVSSv3: 7.8: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
An incorrect permission assignment vulnerability in Trend Micro Apex One and Apex One as a Service could allow a local attacker to load a DLL with escalated 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-2021-42012Stack-based Buffer Overflow Privilege Escalation Vulnerability
CVSSv3: 7.8: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
A stack-based buffer overflow vulnerability in Trend Micro Apex One and Apex One as a Service could allow a local attacker to escalate 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-2021-23139Null Pointer Vulnerability
CVSSv3: 3.5: AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
A null pointer vulnerability in Trend Micro Apex One could allow an attacker to crash the CGI program on affected installations.


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:


External Reference(s)

The following advisories may be found at Trend Micro's Zero Day Initiative Published Advisories site:
  • ZDI-CAN-13874
  • ZDI-CAN-13861
  • ZDI-CAN-13873
  • ZDI-CAN-13898
  • ZDI-CAN-13534
  • ZDI-CAN-13846
  • ZDI-CAN-13857
  • ZDI-CAN-13936
  • ZDI-CAN-13522
  • ZDI-CAN-13830
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Rating:
Category:
Update
Solution Id:
000289229
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