CVE-2023-6932 is a high-severity use-after-free vulnerability in the Linux kernel's ipv4: igmp component. This vulnerability allows a race condition to be exploited, causing a timer to be mistakenly registered on a Read-Copy Update (RCU) read-locked object that is freed by another thread. With a CVSS score of 7.8, it poses a significant risk to systems running affected versions of the Linux kernel.
Risk to organizations includes potential local privilege escalation, allowing an attacker to gain elevated privileges on the system. Given the high severity and the nature of the vulnerability, organizations should prioritize patching immediately to safeguard their systems.
As of now, there is no public exploit confirmed for this vulnerability. However, the exploitation status should be monitored closely as the situation evolves. Organizations should ensure they are running the latest versions of the affected components to mitigate this risk.
The vulnerability was published on December 19, 2023, and it is critical for organizations to assess their systems for exposure to this issue and apply the necessary patches to prevent potential exploitation.
Vulnerability Details
CVE-2023-6932 is classified under CWE-416, indicating a use-after-free vulnerability. It affects Debian Linux and the Linux kernel, specifically targeting the ipv4: igmp component. This vulnerability was published in the context of the Linux kernel and is critical for maintaining system integrity and security.
The vulnerability's CVSS score is 7.8, categorized as high severity, reflecting its potential impact on confidentiality, integrity, and availability. Organizations utilizing affected versions should act swiftly to implement the recommended patches.
Technical Analysis
The root cause of CVE-2023-6932 is a race condition within the Linux kernel's ipv4: igmp component. Attackers may leverage this condition to exploit a local privilege escalation. The attack vector is local, meaning that an attacker must have access to the local system to execute the exploit.
The attack complexity is classified as low, indicating that successful exploitation does not require advanced skills. Privileges required for exploitation are low, and no user interaction is needed. If exploited, the impact on confidentiality, integrity, and availability is rated as high.
Risk & Impact Analysis
Organizations running vulnerable versions of the Linux kernel are at risk of local privilege escalation, which could lead to unauthorized access and control over critical system resources. The potential blast radius includes any system relying on the affected components, thus emphasizing the need for immediate action.
The urgency assessment based on its CVSS score indicates that organizations should address this vulnerability in their priority patch cycle. The high exploitability score reflects the necessity for swift remediation to mitigate risks associated with this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include Debian Linux 10.0 and various versions of the Linux kernel prior to specific commits. All versions prior to vendor patch are vulnerable.
Mitigation & Remediation
Organizations should upgrade to the versions past commit e2b706c691905fe78468c361aaabc719d0a496f1 to mitigate this vulnerability. If a patch is unavailable, consider implementing workaround measures such as configuration hardening and network controls.
For comprehensive security, organizations can also engage in penetration testing to validate the effectiveness of their security measures.
Detection Guidance
Organizations should monitor logs for indicators of exploitation attempts, behavioral anomalies, and any unauthorized changes to the system. Network signatures that correlate to known attack patterns may also assist in detection.
AppSecure Threat Intelligence Insight
This vulnerability highlights the ongoing challenges in maintaining kernel security, particularly regarding race conditions and memory management. Security teams should review their coding practices and consider adopting stricter validation mechanisms to prevent similar vulnerabilities in the future.
Organizations should prioritize the implementation of secure coding guidelines and conduct regular security assessments to mitigate risks associated with vulnerabilities like CVE-2023-6932. For further insights, refer to our resources on vulnerability management programs and penetration testing methodologies to enhance your security posture.
For further reading, organizations can explore our articles on API security testing and cloud security assessments to identify and address potential vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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