Cybozu Garoon fails to restrict access permission in the Phone Messages function


Cybozu Garoon provided by Cybozu,Inc. is a groupware. Cybozu Garoon contains an access restriction flaw in the Phone Messages function

Yuji Tounai reported this vulnerability to Cybozu, Inc., and Cybozu, Inc. reported it to JPCERT/CC to notify users of its solution through JVN.
JPCERT/CC and Cybozu, Inc. coordinated under the Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single Instance
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Cybozu, Inc.
  • Cybozu Garoon 3.0.0 to 4.2.3


A user may set uncofirmed phone messages to be displayed as if they have already been confirmed.

[Update the Software]
Update to the latest version according to the information provided by the developer.
Vendor Information

Cybozu, Inc.
CWE (What is CWE?)

  1. Permissions(CWE-264) [NVD Evaluation]
CVE (What is CVE?)

  1. CVE-2017-2091

  1. JVN : JVN#73182875
  2. National Vulnerability Database (NVD) : CVE-2017-2091
Revision History

  • [2017/02/20]
      Web page was published
      References : Content was added