JVN#88745657
Cybozu KUNAI for Android information management vulnerability
Overview
Cybozu KUNAI for Android contains an information management vulnerability.
Products Affected
- Cybozu KUNAI for Android 3.0.4 to 3.0.5.1
Description
Cybozu KUNAI for Android is a mobile client software for using Cybozu from an Android device. Cybozu KUNAI for Android provides a function to output log information when synchronizing data with Cybozu, however the function is disabled by default.
Cybozu KUNAI for Android contains an issue where it outputs log information when its data is synchronized with Cybozu for the first time, even if the log output function is disabled.
Impact
If a user of Cybozu KUNAI for Android uses another malicious Android application, the log information managed by Cybozu KUNAI for Android may be disclosed.
Solution
Update the Software
Update to the latest version according to the information provided by the developer.
Vendor Status
| Vendor | Status | Last Update | Vendor Notes |
|---|---|---|---|
| Cybozu, Inc. | Vulnerable | 2017/03/13 | Cybozu, Inc. website |
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) |
Comment
This analysis assumes that the user is tricked into installing an application to obtain data that the product outputs.
Credit
Kusano Kazuhiko reported this vulnerability to Cybozu, Inc., and Cybozu, Inc. reported this vulnerability to JPCERT/CC to notify users of its solution through JVN. JPCERT/CC and Cybozu, Inc. 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-2017-2109 |
| JVN iPedia |
JVNDB-2017-000045 |