Description
A flaw was found in kubevirt 0.29 and earlier. Virtual Machine Instances (VMIs) can be used to gain access to the host's filesystem. Successful exploitation allows an attacker to assume the privileges of the VM process on the host system. In worst-case scenarios an attacker can read and modify any file on the system where the VMI is running. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2024-1148
1. Vulnerability Assessment and Severity Evaluation
The vulnerability identified in EUVD-2024-1148 affects kubevirt versions 0.29 and earlier. This flaw allows Virtual Machine Instances (VMIs) to gain unauthorized access to the host's filesystem, potentially leading to privilege escalation. The CVSS (Common Vulnerability Scoring System) base score of 9.9 indicates a critical severity level. The scoring vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H breaks down as follows:
- Attack Vector (AV): Network (N) - The vulnerability can be exploited remotely over the network.
- Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
- Privileges Required (PR): Low (L) - The attacker needs low-level privileges to exploit the vulnerability.
- User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
- Scope (S): Changed (C) - The vulnerability affects a component that can impact resources beyond its security scope.
- Confidentiality (C): High (H) - The vulnerability has a high impact on data confidentiality.
- Integrity (I): High (H) - The vulnerability has a high impact on data integrity.
- Availability (A): High (H) - The vulnerability has a high impact on system availability.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector involves exploiting the flaw in kubevirt to gain access to the host's filesystem from within a VMI. Potential exploitation methods include:
- Escape from VMI: An attacker could use a specially crafted VMI to break out of the virtualized environment and access the host's filesystem.
- Privilege Escalation: Once access to the host's filesystem is achieved, the attacker can escalate privileges to those of the VM process on the host system.
- Data Manipulation: The attacker can read, modify, or delete any file on the host system, compromising data confidentiality, integrity, and availability.
3. Affected Systems and Software Versions
The vulnerability affects:
- kubevirt versions 0.29 and earlier: Organizations using these versions are at risk and should prioritize updating to a patched version.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Update kubevirt: Upgrade to a version of kubevirt that includes the patch for this vulnerability.
- Restrict Access: Implement strict access controls and limit the privileges of VMIs to minimize the potential impact of an exploit.
- Monitoring and Logging: Enhance monitoring and logging to detect any suspicious activities related to VMIs and the host's filesystem.
- Network Segmentation: Segregate critical systems and sensitive data to limit the lateral movement of an attacker.
- Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security gaps.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to organizations within the European Union, particularly those relying on kubevirt for virtualization. The potential for data breaches, unauthorized access, and system downtime could have severe implications for data protection and compliance with regulations such as GDPR. Organizations must act swiftly to address this vulnerability to protect sensitive data and maintain operational integrity.
6. Technical Details for Security Professionals
- Vulnerability Identification: The flaw is identified as CVE-2020-14316 and GHSA-828r-r2c8-rfw3.
- References:
Security professionals should review these references for detailed technical information and guidance on patching and mitigation strategies.
Conclusion
EUVD-2024-1148 represents a critical vulnerability in kubevirt that requires immediate attention. Organizations should prioritize updating to a patched version and implement robust security measures to protect against potential exploitation. The impact on data confidentiality, integrity, and system availability underscores the urgency of addressing this vulnerability to safeguard European cybersecurity infrastructure.