CVE-2022-32250 is a high-severity vulnerability identified in the Linux kernel, specifically in the net/netfilter/nf_tables_api.c file, which affects versions up to 5.18.1. This vulnerability allows a local user, capable of creating user or network namespaces, to escalate privileges to root. The root cause is an incorrect NFT_STATEFUL_EXPR check leading to a use-after-free condition, which can be exploited to gain unauthorized access.
With a CVSS score of 7.8, this vulnerability represents a significant risk to organizations utilizing the Linux kernel, as it can lead to complete control over affected systems. The potential impact includes high confidentiality, integrity, and availability risks, making it imperative for organizations to take immediate action.
At present, there are no known public exploits available for this vulnerability; however, the existence of suitable proof-of-concept (PoC) code on GitHub increases the likelihood of exploitation in the wild. Therefore, organizations must prioritize patching this vulnerability as part of their security posture.
Given the critical nature of this vulnerability, organizations should prioritize patching immediately. Regular monitoring for updates and ensuring systems are not running vulnerable versions is essential to mitigate the risk.
Vulnerability Details
The vulnerability is officially described as follows: CVE-2022-32250 allows a local user to escalate privileges to root due to a use-after-free condition. The CVSS score for this vulnerability is 7.8, indicating a high severity level.
The affected products include various distributions of the Linux kernel, notably Debian and Fedora, with specific versions outlined in the configurations. The vulnerability is categorized under CWE-416, which refers to use-after-free vulnerabilities.
Technical Analysis
The root cause of CVE-2022-32250 is traced back to an incorrect NFT_STATEFUL_EXPR check within the Linux kernel's netfilter subsystem. This flaw allows a local attacker to manipulate memory in such a way that it leads to a use-after-free condition, which can be exploited to escalate privileges.
The attack vector is local; therefore, an attacker must have local access to the system to exploit this vulnerability. The attack complexity is low, requiring minimal skill or effort on the part of the attacker. Privileges required for exploitation are also low, as the attacker needs only user-level access.
No user interaction is required for exploitation, making the attack even more straightforward. The potential impacts on confidentiality, integrity, and availability are all high, significantly affecting the affected systems.
Risk & Impact Analysis
The presence of CVE-2022-32250 in the Linux kernel exposes users to severe risks. Attackers may leverage this vulnerability to gain root access, potentially compromising sensitive data and system integrity. The blast radius could extend across various systems running affected versions of the Linux kernel, impacting not just individual servers but potentially entire networks.
Risk to organizations includes unauthorized access and potential control over critical systems. Given the high CVSS score, organizations should address in priority patch cycle to mitigate this risk effectively.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions include all Linux kernel versions through 5.18.1, specifically those prior to the vendor patches. This includes various distributions such as Debian, Fedora, and NetApp firmware versions.
Mitigation & Remediation
To mitigate this vulnerability, organizations should ensure they are running the latest patched versions of the Linux kernel. It is vital to monitor for updates and apply patches as they become available. For those unable to patch immediately, consider implementing network controls and monitoring solutions to detect potential exploitation attempts.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor their systems for unusual log entries or behaviors indicative of exploitation attempts. Key indicators include unauthorized access attempts, unexpected changes to system configurations, and the presence of unusual processes.
AppSecure Threat Intelligence Insight
CVE-2022-32250 highlights the ongoing risks associated with privilege escalation vulnerabilities in widely used systems. The presence of public exploit code on platforms like GitHub suggests a heightened risk of exploitation. Security teams should prioritize awareness and training around this vulnerability.
For further insights on managing vulnerabilities effectively, organizations may refer to the following resources: penetration testing methodology, vulnerability management program design, and API penetration testing best practices to strengthen overall 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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