JVN#25385698
Cybozu Garoon access restriction bypass vulnerability
Overview
Cybozu Garoon contains an access restriction bypass vulnerability.
Products Affected
- Cybozu Garoon 3.0.0 to 4.10.0
Description
Single sign-on function of Cybozu Garoon provided by Cybozu, Inc. contains a restriction bypass vulnerability (CWE-284).
Impact
An attacker who can access the product may bypass authentication of Single sign-on function and view the information which is available only for sign-on users.
Solution
Apply the Patch
Apply the patch according to the information provided by the developer.
[Updated on 2019 April 22]
Update the Software
Update to the latest version according to the information provided by the developer.
According to developer, this vulnerability was addressed in Cybozu Garoon 4.10.1.
Vendor Status
| Vendor | Status | Last Update | Vendor Notes |
|---|---|---|---|
| Cybozu, Inc. | Vulnerable | 2018/12/10 | 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) |
Credit
Kanta Nishitani 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-2018-16178 |
| JVN iPedia |
JVNDB-2018-000130 |
Update History
- 2019/04/22
- Information under the section [Solution] was updated.