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Executive Summary
CVE-2024-38476 is a critical vulnerability affecting Apache HTTP Server versions 2.4.59 and earlier. This vulnerability, with a CVSS score of 9.8, poses a significant threat due to its potential for information disclosure, Server-Side Request Forgery (SSRF), and local script execution. The flaw arises from improper handling of backend application response headers, which can be exploited by attackers to execute malicious scripts or perform unauthorized actions. Although there are no current reports of active exploitation or specific APT group involvement, the critical nature of this vulnerability necessitates immediate attention and mitigation.
Technical Information
CVE-2024-38476 is a severe vulnerability identified in the core functionality of the Apache HTTP Server, specifically affecting versions 2.4.59 and earlier. The vulnerability is classified as an information disclosure and SSRF issue, with the potential for local script execution. The root cause of this vulnerability lies in the server's inadequate handling of response headers from backend applications. When these headers are manipulated, they can lead to unauthorized script execution or SSRF attacks, which may result in the leakage of sensitive information or unauthorized server actions.
The vulnerability is characterized by its high impact on confidentiality, integrity, and availability, as indicated by its CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. This means that the attack vector is network-based, requires low attack complexity, does not require privileges or user interaction, and has a high impact on the system's confidentiality, integrity, and availability.
The exploitation of CVE-2024-38476 involves manipulating the response headers of backend applications. Attackers can craft malicious headers that, when processed by the vulnerable server, can lead to the execution of scripts or SSRF attacks. This can potentially expose sensitive data or allow attackers to perform unauthorized actions on the server, posing a significant risk to affected systems.
Exploitation in the Wild
As of now, there are no confirmed reports of CVE-2024-38476 being actively exploited in the wild. No specific exploits have been identified, and no known APT groups have been associated with this vulnerability. However, given the critical nature of the vulnerability, it is essential for organizations to remain vigilant and implement preventive measures to protect their systems from potential exploitation.
APT Groups using this vulnerability
Currently, there are no known APT groups exploiting CVE-2024-38476. However, the critical nature of this vulnerability makes it a potential target for advanced persistent threat actors in the future. Organizations should stay informed about any developments related to this vulnerability and be prepared to respond to any emerging threats.
Affected Product Versions
CVE-2024-38476 affects Apache HTTP Server versions 2.4.59 and earlier. Organizations using these versions are at risk and should take immediate action to mitigate the vulnerability by upgrading to a secure version.
Workaround and Mitigation
The primary mitigation strategy for CVE-2024-38476 is to upgrade to Apache HTTP Server version 2.4.60 or later, where the vulnerability has been addressed. In addition to upgrading, organizations should review and update configurations that use the 'AddType' directive to connect requests to handlers. It is recommended to transition to using 'SetHandler' as advised in the latest security advisories. Implementing enhanced monitoring and logging can also help detect unusual activities that may indicate exploitation attempts, allowing for timely response and mitigation.
References
For more detailed information on CVE-2024-38476, please refer to the following resources:
- NVD CVE-2024-38476: https://nvd.nist.gov/vuln/detail/CVE-2024-38476
- Apache HTTP Server Security Advisory: https://httpd.apache.org/security/vulnerabilities_24.html
- NetApp Advisory: https://security.netapp.com/advisory/ntap-20240712-0001/
Rescana is here for you
At Rescana, we are committed to helping our customers navigate the complex landscape of cybersecurity threats. Our Continuous Threat and Exposure Management (CTEM) platform is designed to provide comprehensive protection and support, ensuring that your organization remains secure against emerging vulnerabilities like CVE-2024-38476. If you have any questions about this report or any other cybersecurity concerns, please do not hesitate to contact us at ops@rescana.com. We are here to assist you in safeguarding your digital assets and maintaining a robust security posture.
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