EUVD-2024-26219

Comprehensive Technical Analysis of EUVD-2024-26219

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-26219 affects JumpServer, an open-source bastion host and security audit system. The issue allows attackers to bypass input validation in JumpServer's Ansible component, leading to arbitrary code execution within the Celery container. Given that the Celery container operates with root privileges and has database access, the potential impact is severe.

Severity Evaluation:

• CVSS Base Score: 10.0 (Critical)
• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): Low (L)
  • User Interaction (UI): None (N)
  • Scope (S): Changed (C)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): High (H)

The high CVSS score indicates a critical vulnerability that can be exploited remotely with low complexity, requiring minimal privileges and no user interaction. The impact on confidentiality, integrity, and availability is significant.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Code Execution (RCE): Attackers can exploit the vulnerability to execute arbitrary code within the Celery container.
• Privilege Escalation: Since the Celery container runs with root privileges, attackers can escalate their privileges to gain full control over the system.
• Data Exfiltration: With database access, attackers can steal sensitive information from all connected hosts.
• Database Manipulation: Attackers can manipulate the database to disrupt operations or inject malicious data.

Exploitation Methods:

• Input Validation Bypass: Attackers can craft malicious input to bypass the validation mechanism in JumpServer's Ansible component.
• Code Injection: Once the input validation is bypassed, attackers can inject and execute arbitrary code within the Celery container.
• Lateral Movement: With root privileges, attackers can move laterally within the network, compromising other connected systems.

3. Affected Systems and Software Versions

Affected Systems:

• JumpServer versions 3.0.0 through 3.10.6

Software Versions:

• All versions of JumpServer prior to v3.10.7 are vulnerable.

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade: Upgrade JumpServer to version 3.10.7 or later, which includes the fix for this vulnerability.
• Patch Management: Ensure that all systems are regularly updated and patched to mitigate known vulnerabilities.

Long-Term Strategies:

• Input Validation: Implement robust input validation mechanisms to prevent code injection attacks.
• Least Privilege: Apply the principle of least privilege to limit the permissions of containers and services.
• Network Segmentation: Segment the network to limit lateral movement and contain potential breaches.
• Monitoring and Logging: Enhance monitoring and logging to detect and respond to suspicious activities promptly.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using JumpServer, particularly those in critical sectors such as finance, healthcare, and government. The potential for data exfiltration and system manipulation can lead to severe operational disruptions and data breaches. Given the widespread use of JumpServer in Europe, this vulnerability underscores the importance of timely patching and robust cybersecurity practices.

6. Technical Details for Security Professionals

Vulnerability Details:

• Component Affected: JumpServer's Ansible component
• Exploit Mechanism: Bypassing input validation to execute arbitrary code within the Celery container
• Privileges: Celery container runs with root privileges
• Database Access: Celery container has access to the database, allowing attackers to manipulate or exfiltrate data

References:

• GitHub Security Advisory
• SonarSource Blog

Aliases:

• CVE-2024-29201
• GSD-2024-29201

Assigner:

• GitHub_M

EPSS Score:

• 64 (indicating a moderate likelihood of exploitation in the wild)

ENISA IDs:

• Product: JumpServer
• Vendor: JumpServer
• Affected Versions: 3.0.0, ≤ 3.10.6

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risk of exploitation and protect their critical assets.