Acajoom Component for Joomla! <= 3.2.6 Backdoor Detection

high Nessus Plugin ID 39482

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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

Acajoom, a third-party component for Joomla! for managing mailing lists, newsletters, auto-responders, and other communications, is running on the remote host. This version of Acajoom is equal or prior to 3.2.6. It is, therefore, affected by a backdoor in the self.acajoom.php script. An unauthenticated, remote attacker can exploit this backdoor by setting the 'lang' parameter to 'en-g' and calling the script to pass arbitrary input via the 's' parameter to an eval() call, thereby resulting in the execution of arbitrary PHP code, subject to the privileges of the web server user ID.

Note that there is reportedly also another backdoor involving the GetBots() function in the install.acajoom.php script, which emails information to an address in the Russian Federation when the component is installed. However, Nessus has not checked for this.

Solution

Verify if the remote host has been compromised and reinstall the system if necessary. Upgrade to Acajoom version 3.2.7 or later.

Plugin Details

Severity: High

ID: 39482

File Name: acajoom_3_2_6_backdoor.nasl

Version: 1.22

Type: remote

Family: CGI abuses

Published: 6/23/2009

Updated: 6/5/2024

Configuration: Enable thorough checks

Supported Sensors: Nessus

Enable CGI Scanning: true

Risk Information

CVSS Score Rationale: Score based on analysis of the vulnerability.

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: manual

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

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

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

Excluded KB Items: Settings/disable_cgi_scanning

Exploit Available: true

Exploit Ease: Exploits are available

Exploited by Nessus: true

Patch Publication Date: 7/8/2009

Vulnerability Publication Date: 6/22/2009

Reference Information

BID: 35459

Detections

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