SQL Injection in Joomla vBizz Component

Executive Summary

Joomla! Component vBizz version 1.0.7 contains a high-severity SQL injection vulnerability identified as CVE-2019-25759. This vulnerability allows authenticated attackers to execute arbitrary SQL commands by injecting malicious code through the 'payid' parameter in the employee management interface.

Attackers can submit specially crafted POST requests with 'payid' array values containing SQL commands, which enables them to extract sensitive database information such as database version and database names.

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Impact Analysis

This vulnerability can lead to unauthorized access to sensitive database information by allowing attackers to execute arbitrary SQL queries. This could result in data leakage, exposure of confidential information, and potential manipulation of database contents.

Since the vulnerability requires authentication but no user interaction, an attacker with valid credentials could exploit it to compromise the integrity and confidentiality of the database.

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Detection Guidance

This vulnerability can be detected by monitoring for suspicious POST requests targeting the employee management interface of the Joomla! Component vBizz, specifically those containing crafted 'payid' array values that may include SQL commands.

A practical approach is to capture and analyze HTTP POST traffic to the vulnerable component's index.php file, looking for unusual or malformed 'payid' parameters.

For example, using command-line tools like curl or wget, you can simulate or detect such requests. To test or detect the vulnerability, you might run a command similar to the following to send a crafted POST request:

• curl -X POST -d "payid[0]=1' OR '1'='1" https://target-site.com/path/to/vbizz/index.php

Additionally, network monitoring tools or intrusion detection systems (IDS) can be configured to alert on SQL injection patterns in POST data targeting the 'payid' parameter.

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Mitigation Strategies

Immediate mitigation steps include restricting access to the employee management interface to only trusted and authenticated users, as the vulnerability requires authentication.

Ensure that the Joomla! Component vBizz is updated to a version where this vulnerability is patched, if such an update is available.

If an update is not available, consider applying web application firewall (WAF) rules to block or sanitize requests containing suspicious 'payid' parameters.

Additionally, monitor logs for unusual SQL errors or unexpected database activity that could indicate exploitation attempts.

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Compliance Impact

The vulnerability in Joomla! Component vBizz 1.0.7 allows authenticated attackers to execute arbitrary SQL queries and extract sensitive database information. This unauthorized access to sensitive data could potentially lead to non-compliance with data protection regulations such as GDPR and HIPAA, which require safeguarding personal and sensitive information against unauthorized access and breaches.

Since the vulnerability enables extraction of sensitive database information, organizations using the affected component may face risks related to data confidentiality and integrity, which are critical compliance requirements under these standards.

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