Birebin.com Android App SSL certificate validation weakness

[harun.esur@xxxxxxxxxxxx]

Title: Birebin.com Android App SSL certificate validation weakness
Advisory 
URL:http://sceptive.com/p/birebincom-android-app-ssl-certificate-validation-weakness-

== Overview

Birebin.com is an online betting web-site which also provides Android app. for 
the members to ease on betting.

We have found that Android app vulnerable to SSL mitm attacks 
(http://en.wikipedia.org/wiki/Man-in-the-middle_attack) which eventually let 
attackers to gather user name-password and session hijacking capabilities 
against app. users.

== Description

On misconfigured network environments it is possible to redirect HTTPS packets 
over MITM tools for SSL sessions.

When we redirected our network on such a configuration we have observed that 
app sends/receives user data unecrypted.

REQUEST

{
    "Password": "123456",
    "UserName": "abc@xxxxxxx"
    }
And also Token value which is used for session awarenes is vulnerable for 
attackers to use on their own configurations to hijack other users' sessions.

== Affected Version(s)

No verison is given in app. But we provide md5 hash of the vulnerable APK

MD5 (birebin-android-latest.apk) = 60bea6a1694b1ffc87c4dc3f2ba6a8be

== Fixes
No known fixes has been released yet.