CVE-2023-54166 is a vulnerability identified in the Linux kernel, specifically related to the igc driver. This vulnerability allows a kernel panic to occur during the ndo_tx_timeout callback, particularly when transmit queue timeouts happen. The Xeon validation group has reported instances of this issue occurring under various hardware configurations during loaded tests. The potential for race conditions exists when the interface is being brought down and up, alongside the invocation of the reset adapter function by igc_tx_timeout().
The severity level of this vulnerability is classified as low, indicating that while it does pose a risk, it may not be immediately critical for all environments. Organizations should assess their specific use cases and hardware configurations to determine their exposure to this issue. The urgency for defenders is moderate, as the kernel panic could disrupt network operations.
Currently, there is no publicly available exploit confirmed for this vulnerability, and it has not been added to the Known Exploited Vulnerabilities (KEV) catalog. This suggests that while the vulnerability exists, it may not be actively targeted by attackers at this time. Nevertheless, organizations should remain vigilant and monitor for patches or updates from their Linux distributions.
Organizations should prioritize monitoring for any forthcoming patches that address this vulnerability to ensure the stability and security of their systems.
Vulnerability Details
In the Linux kernel, the following vulnerability has been resolved: igc: Fix Kernel Panic during ndo_tx_timeout callback. This patch addresses the issue by turning off all TX ring hardware queues during the igc_down() process, which will be reactivated during the igc_configure_tx_ring() process when the igc_up() procedure is performed later.
The CVSS score for this vulnerability is currently not scored, and hence, it lacks a formal severity classification. The affected systems include various configurations of the Linux kernel utilizing the igc driver.
Technical Analysis
The root cause of this vulnerability is related to how the igc driver handles transmit queue timeouts. When the igc_tx_timeout() function is invoked, it can trigger a kernel panic under certain conditions, particularly when the network interface is being reset or reinitialized. The kernel panic can disrupt network services and lead to system instability.
The attack vector is localized primarily to network interactions, as it involves hardware-level operations within the kernel. The complexity of exploiting this vulnerability is assessed as low; however, it requires specific conditions to trigger a kernel panic. No user interaction is required for this vulnerability to manifest.
The impacts on confidentiality, integrity, and availability are notable. A kernel panic occurs when the system encounters a critical error, which can lead to temporary unavailability of network services.
Risk & Impact Analysis
Risk to organizations includes potential disruptions to network services due to kernel panics triggered by this vulnerability. Although the severity is low, the impact on operational continuity can be significant, especially in environments relying on stable network operations.
Organizations should assess their risk exposure and prioritize monitoring for any patches or updates that address this vulnerability. While the urgency is moderate, proactive measures should be implemented to mitigate potential disruptions.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch.
Mitigation & Remediation
Organizations should keep their systems updated and apply any available patches related to this vulnerability as soon as they are released. Regular updates will help mitigate risks associated with vulnerabilities.
For more information on penetration testing and vulnerability management, organizations can refer to the penetration testing services offered to identify vulnerabilities in their systems.
Detection Guidance
Monitoring for kernel panics and network disruptions can serve as indicators of this vulnerability being exploited. Log files should be reviewed regularly for signs of unusual network activity or errors related to the igc driver.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-54166 lies in its representation of potential weaknesses in network drivers that can lead to serious disruptions. This highlights the importance of regular vulnerability assessments and updates in maintaining system integrity.
Organizations should implement a comprehensive vulnerability management program to proactively identify and mitigate vulnerabilities.
For more insights on network security, organizations can explore our network security design principles to strengthen their defenses.
Additionally, organizations should consider engaging in red teaming exercises to better understand their security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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