This vulnerability allows NGINX Plus and NGINX Open Source users to face potential disruptions. Specifically, when these products are configured to utilize the HTTP/3 QUIC module, undisclosed HTTP/3 requests can lead to the termination of NGINX worker processes. This scenario may occur if an attacker correctly times a request during the connection draining process, a situation over which the attacker has limited control.
The severity of this vulnerability is classified as medium, with a CVSS score of 4.8. This classification indicates that while the risk is present, it is not as critical as higher-severity vulnerabilities. Organizations using NGINX Plus or NGINX Open Source should be aware of the potential for service disruption and take necessary precautions.
Given the nature of this vulnerability, organizations should prioritize patching immediately to mitigate any potential impacts. It is essential to ensure that your configurations are secure, particularly when utilizing HTTP/3 capabilities.
The exploitation status indicates that there are no known exploits available at this time, which adds a layer of comfort; however, vigilance is crucial as attackers may seek to exploit such vulnerabilities in the future.
Organizations using affected versions of NGINX Plus or NGINX Open Source should keep abreast of updates from their vendors and perform regular security assessments to identify and mitigate risks promptly.
Vulnerability Details
The official description of CVE-2024-31079 states that when NGINX Plus or NGINX OSS are configured to use the HTTP/3 QUIC module, undisclosed HTTP/3 requests can cause NGINX worker processes to terminate or cause other potential impact.
The vulnerability is categorized under CWE-121 (Stack-based Buffer Overflow) and CWE-787 (Out-of-bounds Write). It is crucial for organizations to recognize the nature of this vulnerability to implement appropriate defenses.
The CVSS score of 4.8 indicates a medium severity level, suggesting that while the risk exists, it is not critical. The attack vector is identified as network-based, requiring no specific privileges or user interaction.
This vulnerability affects multiple products, including NGINX Open Source, NGINX Plus, and Fedora versions 39 and 40.
Technical Analysis
The root cause of this vulnerability stems from how NGINX handles HTTP/3 requests during specific operational conditions. Attackers may exploit this by sending undisclosed HTTP/3 requests, particularly timed during the connection draining process. The attack complexity is considered high, as it requires precise timing, which is not easily achievable by an attacker.
No privileges are required for exploitation, and no user interaction is needed, making this vulnerability particularly concerning for organizations relying on NGINX for critical operations.
The confidentiality impact is none, while the integrity and availability impacts are low. This means that while sensitive information is not exposed, the availability of the service may be compromised, potentially leading to service outages.
Risk & Impact Analysis
Risk to organizations includes potential service disruptions that could affect user experience and operational capacity. Given the medium severity classification, organizations should address this vulnerability in their priority patch cycle.
The blast radius potential involves services relying on NGINX, particularly those exposed to external networks. Organizations must assess their exposure and the potential impact on their overall infrastructure.
Urgency for organizations is moderate, indicating that while immediate action may not be necessary, prompt remediation should be planned. Organizations should schedule this vulnerability for remediation in their upcoming maintenance cycles.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include NGINX Open Source versions from 1.25.0 to below 1.26.1, NGINX Plus versions 30 and 31, and Fedora versions 39 and 40.
Mitigation & Remediation
Organizations should apply the latest patches provided by F5 and Fedora to remediate this vulnerability. Ensure that your configurations are securely set up, especially when utilizing HTTP/3 features.
For further security measures, consider implementing network controls and monitoring to detect unusual activity related to HTTP/3 requests. Regular security assessments can help identify potential weaknesses.
For comprehensive guidance on security practices, organizations may refer to our application security assessment.
Detection Guidance
Security teams should monitor for unusual log indicators related to HTTP/3 requests. Behavioral anomalies during connection draining processes should be investigated, and network signatures for potential exploitation attempts should be established.
Changes to system configurations or unexpected process terminations may also indicate attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-31079 is a reminder of the challenges associated with newer protocols like HTTP/3. Organizations must remain vigilant and adapt their security postures to address emerging threats.
This vulnerability represents a broader trend of vulnerabilities arising from the implementation of new technologies. Security teams should learn from these incidents to enhance their defensive strategies.
A strategic takeaway is the importance of continuous monitoring and timely patching. For further insights into security practices, organizations can refer to our red teaming services and continuous penetration testing for ongoing assessments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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