A flaw was found in the Netfilter subsystem in the Linux kernel. The issue is in the nft_byteorder_eval() function, where the code iterates through a loop and writes to the `dst` array. On each iteration, 8 bytes are written, but `dst` is an array of u32, so each element only has space for 4 bytes. That means every iteration overwrites part of the previous element corrupting this array of u32. This flaw allows a local user to cause a denial of service or potentially break NetFilter functionality.
The vulnerability has a CVSS score of 6.6, categorizing it as medium severity. This highlights the potential risks to organizations using affected systems. If exploited, this vulnerability can lead to significant availability impacts, which necessitates quick remediation actions.
Currently, this vulnerability is not listed in the Known Exploited Vulnerabilities (KEV) catalog, indicating that there is no confirmed active exploitation in the wild. However, organizations should not delay in addressing this vulnerability as local users could potentially leverage it for denial of service.
Organizations should prioritize patching immediately to mitigate the risk associated with CVE-2024-0607. Regular updates and monitoring of systems are crucial to maintaining security against vulnerabilities of this nature.
Vulnerability Details
The vulnerability can be attributed to a flaw in the Netfilter subsystem of the Linux kernel, specifically in the nft_byteorder_eval() function. The flaw arises because the function writes 8 bytes into a destination array that can only accommodate 4 bytes per element, causing corruption in the u32 array. The vulnerability impacts various Linux distributions, including Fedora and Red Hat Enterprise Linux, and affects all versions prior to the vendor patch.
Technical Analysis
The root cause of this vulnerability is an incorrect handling of memory allocation within the nft_byteorder_eval() function in the Netfilter subsystem. The attack vector is local, meaning that an authenticated user can exploit this vulnerability without additional user interaction. The attack complexity is low, and only low privileges are required to initiate the attack.
The potential impacts of exploitation include denial of service, with an availability impact rated as high. Confidentiality and integrity impacts are assessed as low, indicating that while the system may become unavailable, sensitive data is not directly compromised.
Risk & Impact Analysis
The real-world risk posed by CVE-2024-0607 includes the potential for significant service disruption to systems running affected versions of the Linux kernel. Organizations that rely on these systems may face operational challenges, especially if the Netfilter functionality is critical for network security.
Given the medium severity of this vulnerability, organizations should address it in their priority patch cycle. The availability impact of this flaw necessitates immediate attention to prevent possible service interruptions.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects all versions of the Linux kernel prior to 6.7, as well as specific versions including Fedora 39 and Red Hat Enterprise Linux 8.0 and 9.0. Organizations should confirm their current version and apply the necessary patches.
Mitigation & Remediation
To remediate this vulnerability, organizations should update their Linux kernel to the latest version available. Patches are available from the respective vendors. Additionally, organizations should consider implementing configuration hardening and network controls to mitigate the risk of exploitation.
For continuous security testing, organizations can consult resources such as continuous penetration testing to ensure their systems remain secure against such vulnerabilities.
Detection Guidance
Organizations should monitor logs for unusual patterns and behavioral anomalies that may indicate exploitation attempts. Network signatures should also be established to detect any unauthorized access or modification attempts in real-time.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-0607 lies in its potential to disrupt essential services in Linux environments. As organizations continue to adopt Linux-based systems, understanding and addressing vulnerabilities such as this will be critical.
This vulnerability highlights the importance of maintaining a robust vulnerability management program. Security teams should remain vigilant and proactive in identifying, assessing, and mitigating vulnerabilities within their systems.
For more insights on vulnerability management strategies, refer to the vulnerability management program design and consider adopting penetration testing methodologies to enhance your security posture.
As security practices evolve, it is imperative to remain updated on trends and potential threats. Organizations should leverage resources to stay informed about emerging vulnerabilities and exploit trends.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)