Affected Version(s)
| Product | Affected Version(s) | Platform | Language(s) |
|---|---|---|---|
| Worry-Free Business Security (WFBS) | 10.0 SP1 | Windows | English |
| Worry-Free Business Security Services (WFBSS) | SaaS | Windows | English |
Solution
Trend Micro has released the following solutions to address the issue:
| Product | Updated version | Notes | Platform | Availability | |
|---|---|---|---|---|---|
| WFBS | 10.0 SP1 Patch 2342 |
| Windows | Now Available | |
| WFBSS | Aug. 30, 2021 hotfix 6.7.1648 / 14.2.1349 | 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-2021-42104 through 42108: Unnecessary Privileges Local Privilege Escalation VulnerabilitiesCVSSv3: 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)
CVSSv3: 7.0: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H (CVE-2021-44019 through 44021)
Unnecessary privilege vulnerabilities in Trend Micro Worry-Free Business Security 10.0 SP1 (all CVEs) and Worry-Free Business Security Services (CVE-2021-42104 through 42107) 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-2021-42012: Stack-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 Worry-Free Business Security 10.0 SP1 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-2021-23139: Null 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 Worry-Free Business Security 10.0 SP1 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:
- Michael DePlante (@izobashi) and Simon Zuckerbraun of Trend Micro's Zero Day Initiative (CVE-2021-42104, 42106, 42108)
- Michael DePlante (@izobashi) of Trend Micro's Zero Day Initiative (CVE-2021-42105, 42107, 44019-44021)
- @Kharosx0 working with Trend Micro's Zero Day Initiative (CVE-2021-42012)
- 何文杰/3imple0ne and 郝龙/bigpang of WebRAY (CVE-2021-23139)
External Reference(s)
- ZDI-CAN-13874
- ZDI-CAN-13861
- ZDI-CAN-13873
- ZDI-CAN-13898
- ZDI-CAN-13857
- ZDI-CAN-13936
- ZDI-CAN-14219
- ZDI-CAN-14220
- ZDI-CAN-14221