Rakuma App vulnerable to authentication information disclosure


Rakuma App provided by Rakuten, Inc. contains an authentication information disclosure vulnerability (CWE-200).

Gaku Mochizuki of Mitsui Bussan Secure Directions, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 4.7 (Medium) [IPA Score]
  • Attack Vector: Local
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: None
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 2.6 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: High
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: None
  • Availability Impact: None
Affected Products

Rakuten, Inc.
  • rakuma App for Android version 7.15.0 and earlier
  • rakuma App for iOS version 7.16.4 and earlier


If a malicious application created by the third party with a purpose to attack a Rakuma user is installed in the Rakuma user's mobile device, it may obtain Rakuma user's authentication information.

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

Rakuten, Inc.
CWE (What is CWE?)

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

  1. CVE-2019-6024

  1. JVN : JVN#41566067
  2. National Vulnerability Database (NVD) : CVE-2019-6024
Revision History

  • [2019/11/07]
      Web page was published