Published:2012/08/16  Last Updated:2012/08/17

Multiple GREE Android applications vulnerable in the WebView class


Multiple Android applications provided by GREE contain a vulnerability in the WebView class.

Products Affected

  • GREE versions prior to 1.4.0
  • Tanken Dorirando versions prior to 1.0.7
  • Tsurisuta versions prior to 1.5.0
  • Monpura versions prior to 1.1.1
  • Kaizokuoukoku Columbus versions prior to 1.3.5
  • haconiwa versions prior to 1.1.0
  • Seisen Cerberus versions prior to 1.1.0
  • GREE Market versions prior to 2.1.2

Note that these applications are available only in Japanese.


Multiple Android applications that use the SDK for HTML-based applications provided by GREE contain a vulnerability in the WebView class.


If a user of the affected product uses other malicious Android application, information managed by the affected product may be disclosed.


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


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2012.08.16

Measures Conditions Severity
Access Required can be attacked over the Internet using packets
  • High
Authentication anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required the user must be convinced to take a difficult or suspicious action. If the honest user must have elevated privileges, they are likely to be more suspicious
  • Low
Exploit Complexity some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)
  • Mid-High

Description of each analysis measures


This analysis assumes that the user is tricked into installing a malicious application.


Takeshi Terada of Mitsui Bussan Secure Directions, Inc., Katsuhiko Sato of Japan Smartphone Security Association(JSSEC) reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2012-4006
JVN iPedia JVNDB-2012-000077

Update History

Published in English.