CVE-2011-4297: Moodle Comment Capability Misconfiguration Vulnerability
Summary
CVE-2011-4297: Moodle does not properly restrict comment capabilities. Affects moodle/moodle across 2 version ranges.
>= 2.0.0, < 2.0.4
>= 2.1.0, < 2.1.1
Fixed in 2.0.4 or 2.1.1, depending on the release line you run. How to fix ↓
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Background
Moodle is an open-source learning platform designed to provide educators, administrators, and learners with a single robust, secure, and integrated system to create personalized learning environments. It supports various functionalities such as course management, user enrollment, and content delivery. However, certain versions of Moodle have a vulnerability that allows unauthorized users to post comments, potentially leading to spam or inappropriate content on front-page activities.
Vulnerability Detail
The vulnerability exists in comment/lib.php in Moodle versions 2.0.x before 2.0.4 and 2.1.x before 2.1.1. It fails to properly restrict comment capabilities, allowing remote attackers to exploit the guest role to post comments on front-page activities. This can lead to the dissemination of unwanted or harmful content, affecting the integrity and user experience of the platform.
How To Fix
Fixed versions by release line
The minimum fixed version depends on the release line you run.
-
>= 2.0.0, < 2.0.42.0.4composer require moodle/moodle:2.0.4 -
>= 2.1.0, < 2.1.12.1.1composer require moodle/moodle:2.1.1
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Workaround
As a temporary workaround, you can restrict guest access to commenting features by adjusting the role permissions in the Moodle administration settings. Navigate to Site administration > Users > Permissions > Define roles, and modify the guest role to limit comment capabilities.
Conclusion
The CVE-2011-4297 vulnerability in Moodle poses a risk by allowing unauthorized comment posting through improper restrictions. It is crucial to update to the latest patched versions to mitigate this risk. Additionally, utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2011-4297 is a vulnerability in Moodle that allows unauthorized users to post comments due to improper restrictions on comment capabilities.
Moodle versions 2.0.x before 2.0.4 and 2.1.x before 2.1.1 are affected by this vulnerability.
You can check your Moodle installation against this vulnerability using Vulert, which monitors open-source vulnerabilities in real-time. Visit Vulert Scanner to test your application without needing to sign up.
The risks include the potential for spam or inappropriate comments being posted on your Moodle site, which can disrupt the learning environment and harm the platform's reputation.
Yes, you can temporarily restrict guest access to commenting features by modifying the permissions for the guest role in the Moodle administration settings.
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