Published:2012/08/07  Last Updated:2012/08/07

LINE for Android vulnerable in handling of implicit intents


LINE for Android contains a vulnerability in the handling of implicit intents.

Products Affected

  • LINE for Android version 2.5.4 and earlier


LINE for Android provided by NHN Japan, is an application for communication with others. LINE for Android contains a vulnerability in the handling of implicit intents.


Information such as messages sent by LINE may be leaked to a third party through a malicious application.


Update the software
According to the developer, the product is automatically updated when the application is used without user interaction.

For more information, refer to the information provided by the developer.


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2012.08.07

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.


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.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2012-4005
JVN iPedia JVNDB-2012-000074