Published:2016/06/27  Last Updated:2016/06/27

JVN#39594409
DMM Movie Player App fails to verify SSL server certificates

Overview

DMM Movie Player App provided by DMM.com Labo Co.,Ltd. fails to verify SSL server certificates.

Products Affected

  • DMM Movie Player App for Android versions prior to 1.2.1
  • DMM Movie Player App for iPhone/iPad versions prior to 2.1.3

Description

DMM Movie Player App provided by DMM.com Labo Co.,Ltd. fails to verify SSL server certificates.

Impact

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

Solution

Update the Application
Update to the latest version according to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
DMM.com Labo Co.,Ltd. Vulnerable 2016/06/27

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

CVSS v3 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Base Score: 4.8
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)
CVSS v2 AV:N/AC:H/Au:N/C:P/I:P/A:N
Base Score: 4.0
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)

Comment

This analysis assumes a man-in-the-middle attack being conducted by an attacker that places a malicious wireless LAN access point.

Credit

Yuji Tounai of NTT Com Security (Japan) KK reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2016-4829
JVN iPedia JVNDB-2016-000120