CVE-2021-34434 : Exploit Details and Defense Strategies
Get insights into CVE-2021-34434 affecting Eclipse Mosquitto versions 2.0 to 2.0.11. Learn about the impact, technical details, affected systems, and mitigation steps.
A detailed analysis of CVE-2021-34434 focusing on the vulnerability in Eclipse Mosquitto versions 2.0 to 2.0.11 related to dynamic security plugin misconfiguration.
Understanding CVE-2021-34434
This section provides insights into the nature and impact of the CVE-2021-34434 vulnerability.
What is CVE-2021-34434?
The CVE-2021-34434 vulnerability exists in Eclipse Mosquitto versions 2.0 to 2.0.11. It arises when using the dynamic security plugin, allowing existing subscriptions for a client to remain active even after the ability to make new subscriptions on a topic is revoked while a durable client is offline.
The Impact of CVE-2021-34434
The impact of this vulnerability includes a failure to revoke existing subscriptions for a client, potentially leading to unauthorized access or data leakage.
Technical Details of CVE-2021-34434
Explore the specific technical details of the CVE-2021-34434 vulnerability.
Vulnerability Description
The vulnerability occurs in Eclipse Mosquitto versions 2.0 to 2.0.11 due to improper handling of subscription revocation when using the dynamic security plugin.
Affected Systems and Versions
The primary affected system is Eclipse Mosquitto, with versions 2.0 to 2.0.11 being susceptible to this vulnerability.
Exploitation Mechanism
Exploiting this vulnerability involves taking advantage of the failure to revoke existing subscriptions, potentially allowing an attacker to maintain unauthorized access.
Mitigation and Prevention
Discover the necessary steps to mitigate the risks associated with CVE-2021-34434.
Immediate Steps to Take
Users are advised to update Eclipse Mosquitto to a patched version beyond 2.0.11 and restrict access to vulnerable systems.
Long-Term Security Practices
Implement robust security protocols, regularly update software, and monitor for any unauthorized access attempts.
Patching and Updates
Regularly check for security updates from Eclipse Mosquitto and apply patches promptly to prevent exploitation of known vulnerabilities.