In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself. This vulnerability allows sock_map proto callbacks to call themselves recursively, leading to potential stack overflows and resource leaks. As this is classified as a critical vulnerability with a CVSS score of 9.1, organizations must prioritize patching immediately.
Risk to organizations includes high confidentiality and availability impacts, making it essential to address this vulnerability in a timely manner. The exploitation status indicates that there are no known exploits or proof-of-concept code available at this time.
Organizations that utilize the Linux kernel in their infrastructure should assess their systems to determine if they are running affected versions. The urgency of this vulnerability warrants immediate attention to prevent possible exploits.
The publication date for this vulnerability is May 21, 2024, and it has been analyzed thoroughly, with remediation efforts already underway.
Organizations should implement monitoring and logging practices to detect any anomalies or indicators of compromise related to this vulnerability.
Vulnerability Details
The vulnerability detailed in CVE-2023-52735 is classified as a critical issue within the Linux kernel. The specific problem lies within the sockmap protocol, where callbacks can inadvertently call themselves, resulting in recursive loops that can lead to stack overflows. This vulnerability has a CVSS score of 9.1, indicating its critical nature.
The affected product is the Linux kernel, specifically versions prior to 5.15.95 and from 5.16 to 6.1.13, as well as release candidates of version 6.2. The vulnerability was officially published on May 21, 2024, and is classified under CWE-120, which refers to stack-based buffer overflow.
Technical Analysis
The root cause of this vulnerability is a design flaw in the sockmap protocol callbacks, which should not invoke themselves. This leads to a recursive call that can exhaust system resources, causing a stack overflow. The attack vector is network-based, with low complexity, and no privileges or user interaction is required. This means that attackers can exploit the vulnerability without special permissions or user action.
The impact on confidentiality is assessed as high, while integrity is not affected, and availability is also high. This represents a significant risk for organizations using vulnerable Linux kernel versions.
Risk & Impact Analysis
The potential real-world impact of CVE-2023-52735 is considerable. Given that the vulnerability can lead to both high confidentiality and availability impacts, organizations must recognize the urgency of addressing this flaw. The blast radius could extend to critical systems that rely on the Linux kernel for operations, making timely remediation essential.
Organizations should assess their exposure to this vulnerability based on their deployment environment and take immediate action to apply patches or workarounds. The CVSS score of 9.1 emphasizes the severity, and this situation requires attention in the current patch cycle.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions of the Linux kernel are affected: all versions prior to 5.15.95, versions 5.16 to 6.1.13, and release candidates 6.2:rc1 through 6.2:rc6. Organizations should ensure they are running patched versions to mitigate the risk associated with this vulnerability.
Mitigation & Remediation
Organizations must prioritize patching the Linux kernel to versions that are no longer vulnerable to CVE-2023-52735. For those unable to apply patches immediately, workarounds should be implemented to prevent the risk of exploitation. Configuration hardening and network controls can also be effective in mitigating potential impacts.
For further guidance, consider using penetration testing to assess your systems for vulnerabilities.
Detection Guidance
Organizations should monitor logs for indicators of unusual behavior associated with the sockmap protocol. Behavioral anomalies and network signatures related to potential exploitation attempts should also be identified. Changes in system performance or resource utilization may indicate that exploitation has occurred.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-52735 lies in its potential to highlight weaknesses in the Linux kernel's handling of protocol callbacks. This vulnerability represents a trend toward increased scrutiny of kernel-level code, and security teams should learn from incidents like this to enhance their defensive strategies.
To further bolster security measures, organizations should consider implementing a vulnerability management program and regularly update their security posture in response to emerging threats. Additionally, adopting a proactive approach through penetration testing methodology can help organizations remain resilient against future vulnerabilities.
Lastly, it is crucial for organizations to stay informed about the latest trends in cybersecurity, which can be achieved through resources such as security testing best practices to understand and mitigate risks effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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