[Japanese]

JVNDB-2018-000047

IIJ SmartKey App for Android vulnerable to authentication bypass

Overview

IIJ SmartKey App for Android contains an authentication bypass vulnerability.

IIJ SmartKey App for Android provided by Internet Initiative Japan Inc. is an application that enables two-step authentication (two-factor authentication) for a website from an Android device. IIJ SmartKey App for Android contains an authentication bypass vulnerability (CWE-287).

Ryo Tateguchi of AndroPlus 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 3.3 (Low) [IPA Score]
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • 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


Internet Initiative Japan Inc.
  • IIJ SmartKey App for Android version 2.1.0 and earlier

Impact

An attacker may be able to obtain one-time password.
Solution

[Update the Software]
Update to the latest version according to the information provided by the developer.
The developer recommends that users should update the application to 2.1.1 or later version immediately.

[Apply a Workaround]
The following workaround may mitigate the impact of this vulnerability.
*Use the screen lock of Android OS standard function
Vendor Information

Internet Initiative Japan Inc.
CWE (What is CWE?)

  1. Improper Authentication(CWE-287) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2018-0584
References

  1. JVN Status Tracking Notes : JVN#27137002
Revision History

  • [2018/05/11]
      Web page was published