In the Linux kernel, a significant vulnerability has been identified and resolved. Specifically, this vulnerability relates to improper array indexing in the function rtw89_sta_info_get_iter(). The code incorrectly uses the 'rate->he_gi' value as an array index after comparing the 'status->he_gi' value to the array size. This oversight can lead to accessing memory beyond array boundaries, creating a high risk of exploitation. The issue appears to stem from a copy-paste error in the code.
The vulnerability has a CVSS score of 7.8, classified as high severity. This score indicates a significant risk to organizations, particularly because the attack vector is local, and the attack complexity is low. Consequently, organizations should prioritize patching immediately to mitigate any potential risks associated with this vulnerability.
The vulnerability was disclosed on August 17, 2024, and although it has been addressed, understanding its implications remains critical for organizations using affected versions of the Linux kernel. The possibility of exploitation could lead to unauthorized access and manipulation of system integrity.
Organizations utilizing the Linux kernel should take immediate action by reviewing their systems for affected versions and applying the relevant patches. Ensuring that security measures are updated and that system integrity is maintained is crucial in preventing exploitation of this vulnerability.
Vulnerability Details
The official description of the vulnerability states: In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: Fix array index mistake in rtw89_sta_info_get_iter(). In rtw89_sta_info_get_iter() 'status->he_gi' is compared to array size. But then 'rate->he_gi' is used as array index instead of 'status->he_gi'. This can lead to go beyond array boundaries in case of 'rate->he_gi' is not equal to 'status->he_gi' and is bigger than array size. Looks like 'copy-paste' mistake. Fix this mistake by replacing 'rate->he_gi' with 'status->he_gi.' Found by Linux Verification Center (linuxtesting.org) with SVACE.
The vulnerability is categorized under CWE-129, which pertains to improper validation of array index. High severity is assigned due to the potential consequences of exploitation, leading to confidentiality, integrity, and availability impacts.
Technical Analysis
The root cause of this vulnerability lies in the incorrect handling of array indices within the Linux kernel's rtw89 driver. The comparison of 'status->he_gi' against the array size is intended to prevent out-of-bounds access; however, the subsequent usage of 'rate->he_gi' as the index can lead to memory access violations. This issue exemplifies a classic programming error where a variable intended for comparison is mistakenly used as an index, thereby compromising the safety of memory operations.
The attack vector is local, meaning that an attacker must have local access to the system to exploit this vulnerability. The complexity of the attack is low, which indicates that successful exploitation could be achieved with minimal effort. Privileges required are low, as the vulnerability does not necessitate elevated permissions to exploit. No user interaction is required, making this vulnerability particularly concerning for organizations.
The impacts of this vulnerability are severe. The confidentiality, integrity, and availability impacts are all rated as high, indicating that exploitation could lead to significant data breaches, unauthorized modifications to data, and disruption of service. This places organizations at a heightened risk, necessitating immediate attention and remediation.
Risk & Impact Analysis
Risk to organizations includes the potential for unauthorized access to sensitive data, manipulation of system integrity, and overall disruption of service. The blast radius of exploitation could be extensive, affecting not only the vulnerable component but also any systems that interact with it. As this vulnerability is categorized as high severity with a CVSS score of 7.8, organizations should address in priority patch cycle.
Given that the vulnerability has been disclosed and a patch is available, organizations need to prioritize remediation efforts to mitigate the risks associated with this vulnerability. The exploitation potential, combined with the ease of access, presents a significant threat landscape that organizations cannot afford to overlook.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions include the Linux kernel versions from 5.16 to 6.1.102, 6.2 to 6.6.43, and 6.7 to 6.10.2. Organizations should ensure that they are using patched versions to avoid vulnerabilities.
Mitigation & Remediation
Organizations are encouraged to patch their systems to the latest version of the Linux kernel to mitigate this vulnerability. For those unable to immediately apply the patch, consider implementing stricter access controls and monitoring for unusual behavior in network traffic. Additionally, organizations can enhance their security posture through continuous penetration testing to identify and remediate potential weaknesses.
Detection Guidance
Organizations should monitor logs for any access attempts that may indicate exploitation of this vulnerability. Look for behavioral anomalies that indicate unauthorized access or attempts to manipulate kernel-level functionality. Additionally, network signatures related to unusual traffic patterns can help identify potential exploitation activities.
AppSecure Threat Intelligence Insight
The discovery of this vulnerability underscores the importance of thorough testing and validation of code changes. It illustrates the potential risks associated with even minor code alterations. Security teams should ensure rigorous code review processes are in place, particularly for critical components such as the kernel. Organizations can benefit from engaging in penetration testing methodologies to regularly identify vulnerabilities. Furthermore, understanding the trends in vulnerability disclosures can aid in proactive risk management. Leveraging insights from vulnerability management programs can also enhance an organization’s ability to respond to similar vulnerabilities in the future.
In conclusion, addressing this vulnerability should be a top priority for organizations utilizing the Linux kernel. The potential for exploitation is significant, and proactive measures are essential to safeguard sensitive data and maintain system integrity.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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