Published:2022/05/27  Last Updated:2022/05/27

RevoWorks incomplete filtering of MS Office v4 macros


Sanitization process of RevoWorks SCVX, RevoWorks Browser and RevoWorks Desktop provided by J's Communications Co., Ltd. does not filter completely malicious elements.

Products Affected

  • RevoWorks SCVX using "File Sanitization Library" 1.043 and prior versions
  • RevoWorks Browser 2.2.67 and prior versions (when using "File Sanitization Option")
  • RevoWorks Desktop 2.1.84 and prior versions (when using "File Sanitization Option")


RevoWorks SCVX, RevoWorks Browser and RevoWorks Desktop provided by J's Communication Co., Ltd. enables users to execute web browsers, accessing drives, folders, files and registries in a sandboxed environment. Users can download files from the internet to the sandboxed environment, sanitizing through "File Sanitization Library" or "File Sanitization Option", and import to the local environment.
"File Sanitization Library" and "File Sanitization Option" are implemented with some third-party component, but the component's filtering functionality is incomplete, fails to detect nor remove Microsoft Excel 4.0 (XLM) Macros (CWE-791).


When downloading and importing a file to the local environment and open it, some malicious macros may be executed.


Update the Software
Update the product according to the information provided by the developer.

The developer provides the following fixed versions:

  • RevoWorks SCVX using "File Sanitization Library" 1.044 and later
  • RevoWorks Browser 2.2.69 and later
  • RevoWorks Desktop 2.1.85 and later


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Base Score: 5.2
Attack Vector(AV) Physical (P) Local (L) Adjacent (A) Network (N)
Attack Complexity(AC) High (H) Low (L)
Privileges Required(PR) High (H) Low (L) None (N)
User Interaction(UI) Required (R) None (N)
Scope(S) Unchanged (U) Changed (C)
Confidentiality Impact(C) None (N) Low (L) High (H)
Integrity Impact(I) None (N) Low (L) High (H)
Availability Impact(A) None (N) Low (L) High (H)
Base Score: 6.8
Access Vector(AV) Local (L) Adjacent Network (A) Network (N)
Access Complexity(AC) High (H) Medium (M) Low (L)
Authentication(Au) Multiple (M) Single (S) None (N)
Confidentiality Impact(C) None (N) Partial (P) Complete (C)
Integrity Impact(I) None (N) Partial (P) Complete (C)
Availability Impact(A) None (N) Partial (P) Complete (C)


The developer reported this vulnerability to IPA to notify users of its solution through JVN. JPCERT/CC and the developer coordinated under the Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2022-27176
JVN iPedia JVNDB-2022-000039