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Executive Summary
In the ever-evolving landscape of cybersecurity, vulnerabilities such as CVE-2022-41741 present significant challenges to organizations worldwide. This vulnerability, found in the NGINX Open Source and NGINX Plus products, specifically targets the ngx_http_mp4_module. It allows a local attacker to corrupt NGINX worker memory, potentially leading to severe impacts such as the termination of the worker process. The vulnerability is triggered when processing specially crafted audio or video files, making it a critical concern for sectors relying heavily on media processing. This report delves into the technical intricacies of CVE-2022-41741, its potential exploitation, and the necessary mitigation strategies to safeguard your infrastructure.
Technical Information
CVE-2022-41741 is a vulnerability that resides within the ngx_http_mp4_module of NGINX Open Source and NGINX Plus. This module is responsible for processing MP4 files, a common format for audio and video content. The vulnerability is classified as a local attack vector, meaning the attacker must have physical or logical access to the system. The attack complexity is low, requiring no specialized conditions or advanced knowledge, making it accessible to attackers with basic privileges, such as the ability to place a file within the web root. No user interaction is required, further simplifying the attack process.
The vulnerability's impact is significant, with a CVSS v3.1 Base Score of 7.0 and a CVSS v4.0 Base Score of 7.3, both categorized as high. These scores reflect the potential for severe consequences, including the termination of the NGINX worker process, which could disrupt services and lead to data loss or corruption. The vulnerability affects NGINX Open Source versions before 1.23.2 and 1.22.1, NGINX Open Source Subscription versions before R2 P1 and R1 P1, and NGINX Plus versions before R27 P1 and R26 P1.
Exploitation in the Wild
As of the latest reports, there have been no widespread instances of CVE-2022-41741 being exploited in the wild. Additionally, there are no known exploits available for this vulnerability, and no Advanced Persistent Threat (APT) groups have been identified as targeting it. This lack of exploitation provides a critical window for organizations to implement mitigation strategies before the vulnerability becomes a more significant threat.
APT Groups using this vulnerability
Currently, there are no known APT groups exploiting CVE-2022-41741. However, given the nature of the vulnerability and its potential impact, it is crucial for organizations to remain vigilant and proactive in their cybersecurity measures to prevent any future exploitation by threat actors.
Affected Product Versions
The vulnerability affects the following product versions: NGINX Open Source before versions 1.23.2 and 1.22.1, NGINX Open Source Subscription before versions R2 P1 and R1 P1, and NGINX Plus before versions R27 P1 and R26 P1. Organizations using these versions should prioritize upgrading to the latest releases to mitigate the risk associated with CVE-2022-41741.
Workaround and Mitigation
To mitigate the risks posed by CVE-2022-41741, organizations should implement the following strategies. First, restrict access to the ability to upload or process MP4 files to trusted users only, reducing the potential attack surface. Second, upgrade to the latest versions of NGINX Open Source or NGINX Plus that have addressed this vulnerability. Finally, review the configuration of the ngx_http_mp4_module to ensure it is not enabled unless necessary, and eliminate any unnecessary exposure.
References
For further information and technical details, please refer to the following resources: NVD CVE-2022-41741, Red Hat CVE-2022-41741, F5 Networks Advisory, and Medium Article by Akshit Pal.
Rescana is here for you
At Rescana, we understand the complexities and challenges posed by vulnerabilities like CVE-2022-41741. Our Continuous Threat and Exposure Management (CTEM) platform is designed to help organizations identify, assess, and mitigate cybersecurity risks effectively. We are committed to providing our clients with the tools and insights needed to protect their infrastructure from potential threats. Should you have any questions or require further assistance, please do not hesitate to contact our cybersecurity team at ops@rescana.com.
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