JVN#27256219
RevoWorks incomplete filtering of MS Office v4 macros
Overview
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")
Description
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).
Impact
When downloading and importing a file to the local environment and open it, some malicious macros may be executed.
Solution
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
Vendor Status
| Vendor | Link |
| J’s Communication Co., Ltd. | RevoWorks vulnerability information for file sanitization of MS Excel V4 macros (Text in Japanese) |
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
| 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) |
| 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) |
Credit
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 Alert |
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| JPCERT Reports |
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| CERT Advisory |
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| CPNI Advisory |
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| TRnotes |
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| CVE |
CVE-2022-27176 |
| JVN iPedia |
JVNDB-2022-000039 |