CVE Identifier(s): CVE-2021-25228, 25231, 25233, 25234, 25236, 25238 through 25246, 25248, and 25249
Platform(s): Windows
CVSS 3.0 Score(s): 2.5 - 7.8
Severity Rating(s): Low - High
Trend Micro has released new patches for Trend Micro Worry-Free Business Security (WFBS) 10 SP1 and Worry-Free Business Security Services (WFBSS). These patches resolve multiple vulnerabilities related to improper access control information disclosure, server-side request forgery information disclosure, and out-of-bounds read and write issues.
Affected Version(s)
| Product | Affected Version(s) | Platform | Language(s) |
|---|---|---|---|
| Worry-Free Business Security | 10 SP1 (WFBS) | Windows | English |
| Services (WFBSS) | Windows | English |
Solution
Trend Micro has released the following solutions to address the issue:
| Product | Updated version | Notes | Platform | Availability |
|---|---|---|---|---|
| WFBS | 10 SP1 Patch 2274 | Readme | Windows | Now Available |
| WFBSS | Jan. 2021 Monthly Patch (6.7.1500) | 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-2021-25228, 25231, 25233, 25234, 25238 through 25240, 25242 through 25245: Improper Access Control Information Disclosure Vulnerabilities CVSSv3: 5.3: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Improper access control vulnerabilities in Trend Micro Worry-Free Business Security 10 SP1 could allow an unauthenticated user to obtain information about the server and agents - such as hotfix information, logs and hostname.
CVE-2021-25236, 25241: Server-Side Request Forgery (SSRF) Information Disclosure Vulnerabilities
CVSSv3: 5.3: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Server-side request forgery information disclosure vulnerabilities in Trend Micro Worry-Free Business Security 10 SP could allow an unauthenticated user to create a command script to locate online agents and map out network topology a server can communicate with.
Please note: the attacker must know the agent listening port of the managed client in order to exploit this vulnerability.
CVE-2021-25246: Improper Access Control Information Disclosure Vulnerability
CVSSv3: 6.5: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
An improper access control information disclosure vulnerability in Trend Micro Worry-Free Business Security 10 SP1 could allow an unauthenticated user to create a bogus agent on an affected server that could be used then make valid configuration queries.
CVE-2021-25248: Out-of-Bounds Read Information Disclosure Vulnerability
CVSSv3: 2.5: AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
An out-of-bounds read information disclosure vulnerability in Trend Micro Worry-Free Business Security 10 SP1 and Worry-Free Business Security Services could allow an attacker to disclose sensitive information about a named pipe.
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-2021-25249: Out-of-Bounds Write Privilege Information Disclosure Vulnerability
CVSSv3: 7.8: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
An out-of-bounds write privilege information disclosure vulnerability in Trend Micro Worry-Free Business Security 10 SP1 and Worry-Free Business Security Services 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.
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:
- Elias Martinez working with Trend Micro's Zero Day Initiative
- Elias Martinez (FileNotFound) working with Trend Micro's Zero Day Initiative
- Michael DePlante of Trend Micro's Zero Day Initiative
- Lynn and Jay Lo working with Trend Micro's Zero Day Initiative
- Lynn working with Trend Micro's Zero Day Initiative
Related Bulletin(s)
- Trend Micro Apex One and Apex One as a Service January 2021 Security Bulletin
- Trend Micro OfficeScan XG SP1 Security January 2021 Security Bulletin
External Reference(s)
- ZDI-21-103
- ZDI-21-106
- ZDI-21-108
- ZDI-21-109
- ZDI-21-112
- ZDI-21-113
- ZDI-21-114
- ZDI-21-115
- ZDI-21-116
- ZDI-21-117
- ZDI-21-118
- ZDI-21-119
- ZDI-21-120
- ZDI-21-121
- ZDI-21-122
- ZDI-21-123
