In the Unbreakable Enterprise Kernel (UEK), the RDS module has two setsockopt(2) options, RDS_CONN_RESET and RDS6_CONN_RESET, that are not re-entrant. This vulnerability allows a malicious local user with CAP_NET_ADMIN to crash the kernel. With a CVSS 3.1 Base Score of 5.5, this vulnerability is classified as medium severity, with high availability impacts. Organizations using affected Oracle products should act swiftly to implement remediation.
Risk to organizations includes potential downtime and service disruption due to kernel crashes. The availability impacts are significant, especially for critical infrastructure relying on the UEK. Given its medium severity, organizations should address this vulnerability in their patch management processes.
Currently, there are no public exploits confirmed for this vulnerability, and it does not appear in the Known Exploited Vulnerabilities (KEV) catalog, indicating that while it is a risk, it may not yet be actively targeted in the wild. However, organizations should remain vigilant and consider the implications of this vulnerability on their operational security.
Organizations should prioritize patching immediately. Ensuring that systems are updated will mitigate the potential risks associated with this vulnerability and help maintain operational integrity.
Vulnerability Details
The official CVE description states that the RDS module in the Unbreakable Enterprise Kernel has two setsockopt(2) options that are not re-entrant. The vulnerability allows a local user with CAP_NET_ADMIN to crash the kernel, leading to service disruptions. The CVSS score of 5.5 indicates a medium severity level with notable availability impacts.
Affected products include Oracle Linux in versions 6, 7, 8, and 9, as well as Oracle VM Server version 3.0. This allows a broad range of systems to be at risk if they are running these vulnerable versions.
Technical Analysis
The root cause of this vulnerability lies in the non-re-entrant nature of the RDS setsockopt(2) options. Attackers with local administrative privileges can exploit this flaw to crash the kernel, potentially leading to system instability and downtime. The attack vector is local, requiring the attacker to have access to the system, which reduces the risk compared to remote exploits.
The attack complexity is low, and privileges required are also low, making it easier for an attacker with the necessary permissions to leverage this vulnerability. User interaction is not required for this exploit, which increases its potential impact. The confidentiality and integrity impacts are none, but the availability impact is high.
Risk & Impact Analysis
Real-world deployment risk is notable given the potential for significant availability impacts. Organizations using Oracle Linux should assess the vulnerability's implications on their services to avoid operational disruption. The blast radius for this vulnerability could affect all services running on the compromised kernel, leading to widespread downtime.
Based on its CVSS score, this vulnerability should be addressed in a priority patch cycle. Organizations should ensure they have the latest patches applied to mitigate risks associated with this vulnerability.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions include Oracle VM Server version 3.0, as well as Oracle Linux versions 6, 7, 8, and 9. Organizations should ensure they are running patched versions to avoid exposure to this vulnerability.
Mitigation & Remediation
Organizations should follow vendor guidance and apply the latest patches to mitigate this vulnerability effectively. Specific updates from Oracle addressing CVE-2023-22024 should be prioritized in your patch management process.
In case patches are not immediately available, organizations should consider implementing network controls to limit access to systems where this vulnerability could be exploited. Additionally, continuous security monitoring should be enhanced to detect any attempts to exploit this vulnerability.
For further assistance, organizations are encouraged to explore resources related to penetration testing to validate their security posture.
Detection Guidance
Organizations should monitor system logs for indicators of any unusual behavior that may suggest attempts to exploit this vulnerability. Behavioral anomalies such as unexpected kernel crashes or service disruptions should be investigated promptly.
Network signatures that detect unusual setsockopt(2) calls may assist in identifying exploitation attempts. Additionally, any changes to system configurations should be logged and reviewed as part of a comprehensive security monitoring strategy.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-22024 highlights the importance of maintaining robust kernel security and the potential risks posed by local vulnerabilities. This vulnerability represents a trend where misconfigurations or flaws in system calls can lead to severe operational impacts.
Security teams must learn from this incident, ensuring that regular security assessments are conducted to identify and mitigate similar vulnerabilities. Implementing best practices in secure coding and kernel development is essential to prevent such vulnerabilities from emerging.
To further enhance security measures, organizations should consider exploring resources related to penetration testing methodology and vulnerability management best practices to ensure comprehensive security.
Additionally, organizations can gain insights from AI security best practices to further strengthen their defenses 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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