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Monstra 3.0.1 Bruteforce Mitigation Bypass

Monstra 3.0.1 Bruteforce Mitigation Bypass
Posted Nov 12, 2014
Authored by Paulos Yibelo

Monstra versions 3.0.1 and below keep a tally client side in a cookie to count login attempts, allowing an attacker to completely bypass their abuse functionality.

tags | exploit, bypass
advisories | CVE-2014-9006
MD5 | 51f5aa47c152b41dc76733f929955cb1

Monstra 3.0.1 Bruteforce Mitigation Bypass

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#Monstra <= 3.0.1 Admin Bruteforce Limit Bypass

admin/index.php

:33-42

// Admin login
if (Request::post('login_submit')) {

if (Cookie::get('login_attempts') && Cookie::get('login_attempts') >= 5) {

$login_error = __('You are banned for 10 minutes. Try again
later', 'users');

} else {

$user = $users->select("[login='" .
trim(Request::post('login')) . "']", null);
}

The code blocks bruteforce attempts simply by placing a cookie called "login_attempts" in the victims browser an attacker can craft a bruteforce script that either clears cookies or does not send cookies at all.
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