DMM.com Securities FX Apps for Android fail to verify SSL server certificates


Multiple Android Applications provided by DMM.com Securities Co.,Ltd. fail to verify SSL server certificates.

Gaku Taniguchi of RiskFinder,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 4.8 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: High
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

DMM.com Securities Co.,Ltd.
  • DMMFX DEMO Trade for Android Ver.1.5.0 and earlier
  • DMMFX Trade for Android Ver.1.5.0 and earlier
  • GAITAMEJAPAN FX Trade for Android Ver.1.4.0 and earlier


A man-in-the-middle attack may allow an attacker to eavesdrop on an encrypted communication.

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

DMM.com Securities Co.,Ltd.
CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2016-4818

  1. JVN : JVN#40898764
  2. National Vulnerability Database (NVD) : CVE-2016-4818
Revision History

  • [2016/05/30]
      Web page was published
      References : Content was added