CVE-2023-50164 - Unknown Severity - Apache Struts Remote Code Execution

Executive Summary

CVE-2023-50164 is a vulnerability in Apache Struts that allows attackers to perform Remote Code Execution (RCE). By manipulating file upload parameters, an attacker can bypass path traversal restrictions and upload malicious files. This vulnerability has an unknown CVSS v3.x base score and severity, highlighting the potential for significant impact. Users of Apache Struts versions 2.x and 6.x are urged to update their systems immediately to mitigate this risk. The vulnerability affects specific versions of Struts 2 and 6, and public exploits are already available, making immediate action crucial.

Vulnerability Snapshot

Technical Deep Dive

CVE-2023-50164 stems from insufficient validation of file upload parameters within Apache Struts. An attacker can craft specific input values for these parameters that exploit path traversal vulnerabilities. This manipulation allows them to navigate outside the intended upload directory and place malicious files in arbitrary locations on the server. Under specific circumstances, which likely relate to how Struts handles uploaded files and their subsequent execution, this can lead to Remote Code Execution (RCE). The attacker can then execute arbitrary code with the privileges of the web server process, potentially compromising the entire system.

Proof-of-Concept (POC) Insights

Public exploits are available for CVE-2023-50164. Exploit-DB lists potential exploits.

• Potential exploits may exist for CVE-2023-50164 (unknown)
  Author: unknown
  Link: https://www.exploit-db.com/search?cve=2023-50164
  Warning: POC code is intended for educational and research purposes only. Executing POC code can cause harm and may be illegal. Use extreme caution.

Threat Actor Activity

This vulnerability has been linked to APT groups like "apt" and "APT29." These groups are known for sophisticated attacks targeting sensitive data and infrastructure. While specific campaigns using CVE-2023-50164 aren't explicitly mentioned, the availability of public exploits and the involvement of these threat actors suggest a high likelihood of active exploitation. Organizations should be vigilant and prioritize patching.

Impact Assessment

Successful exploitation of CVE-2023-50164 can lead to complete system compromise. An attacker gaining RCE can steal sensitive data, modify system configurations, disrupt services, and install further malware. The impact extends to Confidentiality, Integrity, and Availability. While no specific AWS impact is identified, systems running Struts within AWS environments are equally vulnerable. The moderate relevance to cloud providers emphasizes the need for robust security practices in cloud deployments.

Historical Context and Similar Vulnerabilities

(Placeholder for similar vulnerability analysis. This section will compare CVE-2023-50164 to other similar vulnerabilities in terms of exploitation techniques, severity, affected systems, and mitigations, providing valuable context and insights.)

Cloud Service Provider Implications

While there's no direct AWS impact, this vulnerability highlights the importance of secure coding practices and regular patching for applications deployed on cloud platforms. Cloud service providers and their customers should review their security posture to ensure adequate protection against similar vulnerabilities.

Mitigation and Remediation

The primary mitigation is to update Apache Struts to version 2.5.33 or 6.3.0.2 or later. Consult vendor advisories for specific patch information and workarounds. Organizations should prioritize patching affected systems immediately. In cloud environments, ensure that automated patching mechanisms are enabled and that security best practices are followed.

References

Official Advisories

• NVD Advisory for CVE-2023-50164
• CISA Advisory

Vendor Resources

• Apache Struts Security
• Openwall Mailing List
• NetApp Advisory
• Apache Mailing List

Additional Resources

• MITRE CVE Entry
• CVSS Calculator

Conclusion

CVE-2023-50164 represents a significant risk due to the potential for RCE and the availability of public exploits. Organizations using Apache Struts should prioritize patching immediately. This vulnerability underscores the importance of proactive security measures, including vulnerability scanning, timely patching, and adherence to secure coding practices. The potential impact on cloud environments, especially for those using AWS PaaS offerings, reinforces the need for robust cloud security strategies.