CVE-2024-1085 is a high-severity vulnerability affecting the Linux kernel's netfilter component, specifically the nf_tables functionality. This vulnerability allows local privilege escalation due to a use-after-free error that can lead to a double free condition. It is critical for organizations using affected versions of the Linux kernel to prioritize patching.
The severity of this vulnerability is classified as high, with a CVSS score of 7.8. The implications of such a vulnerability are significant, as it enables attackers with local access to escalate their privileges and potentially compromise the system. The urgency for defenders is paramount, as unpatched systems remain at risk.
Currently, there is an acknowledged exploit for this vulnerability, which increases the risk to organizations. As such, immediate action is required to mitigate potential implications, including unauthorized access and system compromise.
Organizations should prioritize patching immediately to protect against exploitation. The potential for privilege escalation necessitates that security teams take this vulnerability seriously and implement the necessary updates as soon as possible.
Vulnerability Details
The vulnerability is characterized by a use-after-free condition in the netfilter component of the Linux kernel. Specifically, the issue arises in the nft_setelem_catchall_deactivate() function, which improperly handles the state of the catch-all set element, allowing it to be freed multiple times. The official CVE description emphasizes the need for upgrading past commit b1db244ffd041a49ecc9618e8feb6b5c1afcdaa7.
The CVSS score is 7.8, indicating high severity, with impacts on confidentiality, integrity, and availability all rated as high. The vulnerability affects all versions of the Linux kernel from 5.13 to 5.15.148, and from 5.16 to 6.1.75, as well as from 6.2 to 6.6.14, and 6.7 to 6.7.2.
Technical Analysis
The root cause of this vulnerability lies in the incorrect management of memory states during the operation of the nf_tables component. The nft_setelem_catchall_deactivate() function fails to adequately verify whether the catch-all set element is active, leading to the potential for freeing the element multiple times.
The attack vector is local, requiring low privileges with no user interaction necessary. This vulnerability has a low attack complexity, making it easier for attackers to exploit. The impact on confidentiality, integrity, and availability is high, posing a significant risk to system operations.
Risk & Impact Analysis
The risk to organizations includes potential unauthorized access, data breaches, and system control loss. Given the high CVSS score and the existence of an exploit, organizations with vulnerable Linux kernel versions face significant threats. The blast radius can be extensive, as local privilege escalation may lead to further exploitation of network services or sensitive data.
Organizations should address this vulnerability in their priority patch cycle. The urgency is underscored by the CVSS score and the known exploit, emphasizing the need for immediate remediation.
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of the Linux kernel include all versions from 5.13 to 5.15.148, from 5.16 to 6.1.75, from 6.2 to 6.6.14, and from 6.7 to 6.7.2. Organizations using these versions are advised to upgrade to the latest secure versions.
Mitigation & Remediation
To remediate this vulnerability, organizations should apply the patch referenced in the CVE description, specifically upgrading past commit b1db244ffd041a49ecc9618e8feb6b5c1afcdaa7. If immediate patching is not possible, consider implementing strict access controls and monitoring to detect any unauthorized privilege escalation attempts.
For further security validation, organizations can utilize penetration testing services to identify and remediate similar vulnerabilities.
Detection Guidance
Organizations should monitor system logs for unusual privilege escalation attempts and behavioral anomalies that indicate exploitation of this vulnerability. Additionally, applying network controls to limit access to vulnerable systems can help reduce the risk of exploitation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-1085 underscores the importance of memory management and proper state handling in software development. This vulnerability exemplifies how seemingly innocuous coding errors can lead to severe security implications. Security teams should remain vigilant about memory vulnerabilities, as they can serve as gateways for attackers.
For organizations looking to strengthen their defenses against such vulnerabilities, continuous security testing is crucial. Engaging in regular assessments can help identify weaknesses before they are exploited. For guidance on effective security practices, refer to our article on penetration testing methodology, which provides insights on proactive security measures.
Moreover, understanding the trends in vulnerability exposure is essential. For insights into current threats, our resource on vulnerability management programs can help organizations design effective defenses.
In conclusion, CVE-2024-1085 serves as a reminder of the critical need for robust security practices and thorough testing. Organizations are encouraged to remain proactive in their security posture to mitigate risks from such vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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