Published:2013/08/19  Last Updated:2014/08/26

JVN#75084836
Yahoo! Japan Shopping for Android contains an issue where it fails to verify SSL server certificates

Overview

Yahoo! Japan Shopping for Android provided by Yahoo Japan Corporation contains an issue where it fails to verify SSL server certificates.

Products Affected

  • Yahoo! Japan Shopping for Android ver.1.4 and earlier

According to the developer, the iOS version is not affected by this vulnerability.

Description

Yahoo! Japan Shopping for Android provided by Yahoo Japan Corporation contains an issue where it 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 Software
Update to the latest version according to the information provided by the developer.

Vendor Status

Vendor Link
Yahoo Japan Corporation Yahoo! Japan Shopping official application - Yahoo! Japan Shopping for Android

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2013.08.19

Measures Conditions Severity
Access Required must be attacked from a local segment, such as Ethernet, Bluetooth, and 802.11 attacks
  • Mid-High
Authentication anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required the vulnerability can be exploited without an honest user taking any action
  • High
Exploit Complexity expertise and/or luck required (guessing correctly in medium-sized space, kernel expertise)
  • Low-Mid

Description of each analysis measures

Comment

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

Credit

Zachary Mathis of Proactive Defense (Kobe Digital Labo) 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-2013-4700
JVN iPedia JVNDB-2013-000079

Update History

2014/08/26
Fixed information under "Impact"