This vulnerability allows RabbitMQ versions prior to 3.8.16 to be exploited through improper input validation in the AMQP 1.0 client connection endpoint. Attackers may leverage this vulnerability by sending malicious AMQP messages to the target RabbitMQ instance with the AMQP 1.0 plugin enabled. Given its high CVSS score of 7.5, this vulnerability poses a significant threat to the availability of the affected systems.
With an attack vector classified as network and low attack complexity, this vulnerability requires no privileges and does not require user interaction to exploit. The impact on availability is rated as high, making it crucial for organizations utilizing RabbitMQ to address this vulnerability urgently.
Organizations should prioritize patching immediately. The vulnerability was published on June 8, 2021, and affects all versions prior to 3.8.16. If unpatched, organizations risk potential denial of service attacks that could disrupt their operations.
No public exploit has been confirmed, but the ongoing risk necessitates swift remediation to prevent any potential exploitation.
Vulnerability Details
The official description states that RabbitMQ all versions prior to 3.8.16 are prone to a denial of service vulnerability due to improper input validation in the AMQP 1.0 client connection endpoint. A malicious user can exploit the vulnerability by sending malicious AMQP messages to the target RabbitMQ instance having the AMQP 1.0 plugin enabled.
This vulnerability is classified under CWE-400 (Uncontrolled Resource Consumption) and CWE-20 (Improper Input Validation). The CVSS score for this vulnerability is 7.5, indicating it is of high severity. The affected product is RabbitMQ, and the vendor is VMware.
The vulnerability was disclosed on June 8, 2021. Given its implications, organizations utilizing RabbitMQ should stay informed about any updates related to this vulnerability.
Technical Analysis
The root cause of this vulnerability is improper input validation in the AMQP 1.0 client connection endpoint. The attack vector is network-based, allowing attackers to send crafted AMQP messages from remote locations. The attack complexity is low, as no specialized knowledge is required to exploit this vulnerability.
Exploitation of this vulnerability does not require any privileges, meaning that any user can initiate an attack. Additionally, user interaction is not necessary. The impacts are as follows: confidentiality impact is none, integrity impact is none, and availability impact is high, resulting in the potential for denial of service.
Risk & Impact Analysis
Risk to organizations includes significant potential downtime and loss of service accessibility due to denial of service attacks. This can affect customer trust and lead to financial losses. The blast radius is substantial, as RabbitMQ is widely used in various applications and services.
Organizations should assess their RabbitMQ deployments for exposure to this vulnerability. Given the high CVSS score and the potential impact on availability, this vulnerability should be addressed in the priority patch cycle.
The urgency is critical, and organizations should prioritize patching immediately. The risk of exploitation underscores the importance of timely remediation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of RabbitMQ prior to 3.8.16 are affected by this vulnerability. Organizations using earlier versions should upgrade to the latest version to mitigate risks.
Mitigation & Remediation
Organizations should patch their RabbitMQ installations to version 3.8.16 or later. If an immediate upgrade is not feasible, consider implementing network controls to restrict access to the AMQP 1.0 plugin. Additionally, monitor for unusual traffic patterns that may indicate exploitation attempts.
For further information on security measures, organizations can refer to penetration testing services.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for anomalous AMQP message patterns and unexpected service downtime. Implementing network signatures that identify unusual traffic to the RabbitMQ instance can also aid in detection.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of robust input validation in client-server communications. As organizations increasingly rely on messaging frameworks like RabbitMQ, they must remain vigilant against such vulnerabilities.
Security teams should take this as a reminder to regularly audit their systems for vulnerabilities and ensure timely updates of all software components. For additional resources, organizations can explore penetration testing methodologies and vulnerability management programs to strengthen their security posture.
In conclusion, as the threat landscape evolves, continuous monitoring and proactive security measures are essential in mitigating risks associated with vulnerabilities like CVE-2021-22116.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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