Jumi Component for Joomla! <= 2.0.5 Backdoor Detection

critical Nessus Plugin ID 42820

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Synopsis

The remote web server contains a PHP application that is affected by a backdoor allowing the execution of arbitrary code.

Description

The version of Joomla! running on the remote host is affected by a backdoor that is part of a trojan installation of Jumi, a third-party component used for including custom code into Joomla!. An unauthenticated, remote attacker can exploit this backdoor, by using specially crafted input to the 'key' and 'php' parameters of the modules/mod_mainmenu/tmpl/.config.php script, to execute arbitrary PHP code, subject to the privileges of the web server user ID.

Note that Jumi versions 2.0.4 and 2.0.5 are known to have been used as a trojan installation. It is also likely that the backdoor sends information about Joomla's configuration, including administrative and database credentials, to a third party during the component's installation.

Solution

Remove the affected backdoor script, change credentials used by Joomla!, and investigate whether the affected server has been compromised.

Plugin Details

Severity: Critical

ID: 42820

File Name: jumi_2_0_5_backdoor.nasl

Version: 1.19

Type: Remote

Family: CGI abuses

Published: 11/16/2009

Updated: 5/14/2025

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus

Enable CGI Scanning: true

Vulnerability Information

CPE: cpe:/a:joomla:joomla%5c%21

Required KB Items: installed_sw/Joomla!, www/PHP

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 10/30/2009

Reference Information

BID: 36883

Detections

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