Executive Summary

CVE-2019-25755 is a SQL injection vulnerability in Joomla Component vReview version 1.9.11. It allows unauthenticated attackers to execute arbitrary SQL queries by injecting malicious code through the cmId parameter in POST requests to the editReview task endpoint.

Attackers can send URL-encoded SQL UNION statements via this parameter to extract sensitive database information such as usernames, passwords, and database versions.

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Impact Analysis

This vulnerability can have significant impacts including unauthorized access to sensitive database information like usernames and passwords.

Because attackers can execute arbitrary SQL commands without authentication, they can potentially compromise the integrity and confidentiality of the database.

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Detection Guidance

This SQL injection vulnerability can be detected by sending crafted HTTP POST requests to the editReview task endpoint of the Joomla vReview component, specifically targeting the cmId parameter with URL-encoded SQL UNION statements.

Proof-of-concept exploits involve sending malicious input via the cmId parameter in POST requests to check if arbitrary SQL commands can be executed.

• Use curl or similar tools to send a POST request with a payload in the cmId parameter containing SQL injection code, for example:
• curl -X POST -d "task=editReview&cmId=1%20UNION%20SELECT%20user(),database(),version()--" http://target-site/path/to/component

If the response contains database information such as usernames or version details, it indicates the presence of the vulnerability.

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Mitigation Strategies

Immediate mitigation steps include updating the Joomla vReview component to the latest version that addresses this vulnerability.

If an update is not immediately available, restrict access to the vulnerable endpoints by implementing web application firewall (WAF) rules to block malicious POST requests targeting the cmId parameter.

Additionally, monitor and analyze incoming traffic for suspicious SQL injection patterns and consider disabling or removing the vulnerable vReview component until a patch is applied.

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Compliance Impact

The SQL injection vulnerability in Joomla Component vReview 1.9.11 allows unauthenticated attackers to extract sensitive database information such as usernames and passwords. This exposure of sensitive personal and authentication data can lead to non-compliance with data protection regulations like GDPR and HIPAA, which require the protection of personal and sensitive information against unauthorized access.

Because attackers can access confidential user data through this vulnerability, organizations using the affected software may face increased risk of data breaches, potentially resulting in regulatory penalties and loss of trust.

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