CVE-2023-32187 : Vulnerability Insights and Analysis
Critical CVE-2023-32187 in SUSE k3s enables denial of service attacks. Learn about the impact, affected versions, mitigation steps, and prevention measures for enhanced security.
A critical vulnerability has been identified in SUSE k3s, allowing attackers to cause denial of service by exploiting an allocation of resources without limits or throttling. This CVE affects multiple versions of k3s and poses a high availability impact. Here's everything you need to know about CVE-2023-32187.
Understanding CVE-2023-32187
SUSE k3s is vulnerable to an Allocation of Resources Without Limits or Throttling issue that enables attackers with access to the K3s servers' apiserver/supervisor port to trigger denial of service attacks.
What is CVE-2023-32187?
CVE-2023-32187 discloses a vulnerability in SUSE k3s versions v1.24.0 to v1.28.0, where an attacker can exploit the APIserver/Supervisor port (TCP 6443) to launch a denial of service attack, impacting system availability.
The Impact of CVE-2023-32187
The vulnerability's CVSS base score of 7.5 (High) highlights its severity, with a low attack complexity and network-based attack vector. The issue does not require user interaction and affects the system's integrity and availability.
Technical Details of CVE-2023-32187
Expanding on the technical aspects of CVE-2023-32187 provides insights into the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability arises due to an allocation of resources without limits or throttling in SUSE k3s, exposing the system to potential denial of service attacks through the apiserver/supervisor port (TCP 6443).
Affected Systems and Versions
The CVE impacts multiple versions of k3s, including v1.24.0 to v1.28.0, with specific versions outlined for each affected range.
Exploitation Mechanism
Attackers exploit the vulnerability by gaining access to the APIs server/Supervisor port (TCP 6443) of K3s servers, enabling them to trigger denial of service attacks and disrupt system availability.
Mitigation and Prevention
Addressing CVE-2023-32187 requires immediate action to mitigate risks and prevent potential exploitation through specific security practices and software updates.
Immediate Steps to Take
Administrators should apply relevant patches provided by SUSE promptly to secure the k3s instances and safeguard against potential denial of service attacks.
Long-Term Security Practices
Implementing robust security measures, such as network segmentation, access controls, and regular security assessments, enhances the overall defense against similar vulnerabilities.
Patching and Updates
Regularly updating the k3s installations to versions beyond the affected ones and staying informed about security advisories from SUSE and relevant sources is crucial for maintaining system security.