CVE-2023-53462 represents a medium-severity vulnerability in the Linux kernel. This vulnerability allows for uninitialized memory access within the hsr driver, specifically in the fill_frame_info function. The issue has been reported and details can be found in various patches made to the kernel code. Given its nature, organizations using affected versions of the Linux kernel are at risk as it could lead to high availability impact.
The CVSS score for this vulnerability is 5.5, indicating a medium level of severity. This score suggests that the vulnerability is locally exploitable and requires low privileges to affect the system, making it a critical concern for organizations relying on the Linux operating system.
Risk to organizations includes potential denial of service due to high availability impact. Attackers may leverage this vulnerability to disrupt services by causing unexpected behavior in the kernel.
Organizations should prioritize patching immediately. Keeping systems up to date is imperative to protect against this type of vulnerability.
Vulnerability Details
In the Linux kernel, the following vulnerability has been resolved: hsr: Fix uninit-value access in fill_frame_info() Syzbot reports the following uninit-value access problem. The issue is due to VLAN not yet supported in the hsr driver, resulting in an error when the protocol is ETH_P_8021Q in fill_frame_info().
The vulnerability has a CVSS score of 5.5, classified as medium severity. The affected versions include all Linux kernel versions starting from 5.9 up to 5.10.195, 5.11 up to 5.15.132, 5.16 up to 6.1.54, and 6.2 up to 6.5.4, as well as version 6.6:rc1.
Technical Analysis
The root cause of CVE-2023-53462 is an uninitialized value access in the Linux kernel's hsr driver. The attack vector is local, meaning an attacker must have access to the local system to exploit this vulnerability. The attack complexity is low, requiring minimal effort to exploit, and the privileges required are low, allowing less privileged users to potentially initiate an attack.
User interaction is not required to exploit this vulnerability, making it a more critical issue. The impact on confidentiality is none, while the integrity impact is also none. However, the availability impact is high, which could lead to significant disruptions in service.
Risk & Impact Analysis
Real-world deployment risk is significant, as many organizations utilize the Linux kernel for critical systems and applications. The blast radius potential is considerable, given the widespread use of the Linux kernel across various platforms.
Urgency assessment based on the CVSS score indicates that organizations should address this vulnerability in their priority patch cycle. With the potential for high availability impact, timely remediation is essential to avoid disruptions.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of the Linux kernel include: - All versions from 5.9 to 5.10.195 - All versions from 5.11 to 5.15.132 - All versions from 5.16 to 6.1.54 - All versions from 6.2 to 6.5.4 - Version 6.6:rc1.
Mitigation & Remediation
To mitigate this vulnerability, it is recommended that organizations apply the latest patches available for their Linux kernel installations. Organizations should monitor their systems for updates and ensure they upgrade to safe versions of the kernel.
In addition to patching, configuration hardening should be applied to limit access to kernel-level functions that may be exploited. Network controls can also be implemented to monitor and restrict suspicious traffic patterns that may indicate attempts to exploit this vulnerability.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor log indicators for any anomalous behaviors that could indicate exploitation attempts. Behavioral anomalies such as unexpected service interruptions should be documented and investigated.
Network signatures should be updated to detect and alert on patterns consistent with exploitation of this vulnerability. Additionally, any system changes related to kernel updates should be closely monitored.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-53462 underscores the importance of maintaining a robust patch management process. This vulnerability represents a trend of increasing complexity in kernel-level security issues, likely necessitating more stringent security practices.
Organizations should reflect on the lessons learned from this incident to strengthen their defenses against similar vulnerabilities. Proactive measures, including regular security assessments and updates, should be integrated into security strategies.
For comprehensive guidance on addressing vulnerabilities, organizations can refer to resources on vulnerability management programs and consider engaging in penetration testing methodology to ensure comprehensive security coverage.
Exploring advanced strategies through red teaming can also enhance defensive postures against evolving threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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