CVE-2024-32760 is a medium-severity vulnerability affecting F5 NGINX Plus and Open Source. This vulnerability allows for potential worker process termination when these technologies are configured to use the HTTP/3 QUIC module. The CVSS score for this vulnerability is 6.5, indicating a moderate risk that organizations need to be aware of.
Organizations using NGINX Plus or NGINX OSS should take this vulnerability seriously, as it can lead to the termination of NGINX worker processes, potentially impacting availability and service continuity. The vulnerability was published on May 29, 2024, and has been classified under CWE-787.
Currently, there are no known exploits for this vulnerability, and it is not listed as actively exploited in the known exploitation (KEV) database. However, organizations should still prioritize remediation to ensure their systems remain secure.
Organizations should address this vulnerability in their priority patch cycle to avoid potential disruptions to their services.
Vulnerability Details
The vulnerability allows for potential worker process termination when NGINX Plus or NGINX OSS are configured to use the HTTP/3 QUIC module. The CVSS score of 6.5 indicates a medium severity level, highlighting that while the impact may not be critical, it is significant enough to warrant attention.
Under CVSS 3.1, the attack vector is classified as network-based with low complexity, requiring no privileges or user interaction for exploitation. The confidentiality impact is none, while the integrity and availability impacts are both low.
Technical Analysis
The root cause of CVE-2024-32760 lies within undisclosed HTTP/3 encoder instructions that can lead to the termination of NGINX worker processes. The attack vector is network-based, meaning that an attacker can potentially exploit this vulnerability from a remote location without requiring physical access to the server.
Given that the attack complexity is low, this vulnerability could be exploited easily by attackers. No privileges are required, and user interaction is not needed for exploitation. The impacts on confidentiality are non-existent, while the integrity and availability impacts are both rated as low.
Risk & Impact Analysis
Risk to organizations includes potential disruptions in service availability due to NGINX worker processes terminating unexpectedly. This could affect web applications, services relying on NGINX for load balancing, or reverse proxy functionalities.
Organizations running NGINX Plus or NGINX OSS should schedule remediation as soon as possible. The impact of this vulnerability could extend beyond individual services, potentially affecting overall user experience and operational efficiency.
Considering the CVSS score and the potential for availability impact, organizations are advised to prioritize patching this vulnerability in their update cycles.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects the following products and versions:
1. F5 NGINX Plus versions prior to r30 and r31.
2. F5 NGINX Open Source versions from 1.25.0 to 1.26.1.
3. Fedora versions 39 and 40.
Mitigation & Remediation
Organizations should prioritize patching their systems to the latest versions of NGINX Plus and NGINX Open Source. The remediation steps include upgrading to the patched versions as released by F5 and Fedora.
For those unable to apply the patches immediately, consider implementing network controls to limit exposure to this vulnerability, and monitor logs for unusual termination events.
Penetration testing can also be utilized to assess the effectiveness of the applied mitigations.
Detection Guidance
Organizations should monitor the following indicators for detection:
1. Logs for NGINX worker process terminations.
2. Anomalies in traffic patterns that may indicate attempts to exploit this vulnerability.
3. Network signatures that could identify unauthorized access attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-32760 lies in its implications for how HTTP/3 implementations are handled in production environments. As organizations adopt newer protocols like HTTP/3, ensuring robust configurations and understanding potential vulnerabilities is crucial.
This vulnerability may represent a trend in the growing complexity of web protocols and their implementations. Security teams should review their configurations regularly and stay informed about emerging vulnerabilities within protocols used in their infrastructure.
To enhance overall security posture, organizations are encouraged to engage in regular security assessments and maintain awareness of best practices in application security.
Application security assessments should be part of an ongoing security strategy to identify and mitigate vulnerabilities.
Continuous penetration testing can further help organizations adapt to their evolving threat landscape.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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