EUVD-2025-7198

Comprehensive Technical Analysis of EUVD-2025-7198

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-7198 affects Corosync through version 3.1.9. It involves a stack-based buffer overflow in the orf_token_endian_convert function within exec/totemsrp.c. This vulnerability can be exploited if encryption is disabled or if the attacker knows the encryption key. The severity of this vulnerability is rated with a CVSS Base Score of 9.0, indicating a critical issue.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability is exploitable over the network.
• AC:H (High Complexity): Exploiting the vulnerability requires specific conditions or knowledge.
• PR:N (No Privileges Required): No privileges are required to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required to exploit the vulnerability.
• S:C (Changed Scope): The vulnerability affects a different security scope.
• C:H (High Confidentiality Impact): Successful exploitation can lead to high confidentiality impact.
• I:H (High Integrity Impact): Successful exploitation can lead to high integrity impact.
• A:H (High Availability Impact): Successful exploitation can lead to high availability impact.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attack: An attacker can send a large UDP packet to the vulnerable system, potentially causing a stack-based buffer overflow.
• Encryption Bypass: If encryption is disabled or the attacker knows the encryption key, they can craft a malicious packet that bypasses security measures.

Exploitation Methods:

• Crafted UDP Packet: An attacker can craft a large UDP packet designed to overflow the stack buffer in the orf_token_endian_convert function.
• Knowledge of Encryption Key: If the attacker has knowledge of the encryption key, they can encrypt the malicious packet to bypass encryption checks.

3. Affected Systems and Software Versions

Affected Software:

• Corosync versions 0 through 3.1.9

Affected Systems:

• Any system running the affected versions of Corosync, particularly those with encryption disabled or using a compromised encryption key.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Enable Encryption: Ensure that encryption is enabled and that the encryption keys are securely managed.
• Network Filtering: Implement network filters to block unusually large UDP packets.
• Patch Management: Apply the latest patches and updates from Corosync to mitigate the vulnerability.

Long-Term Mitigation:

• Regular Audits: Conduct regular security audits to identify and mitigate similar vulnerabilities.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious network activity.
• Security Training: Provide training to IT staff on secure configuration and management of Corosync.

5. Impact on European Cybersecurity Landscape

The vulnerability in Corosync, a critical component for high-availability clusters, poses a significant risk to European organizations relying on such clusters for mission-critical applications. The potential for high confidentiality, integrity, and availability impacts underscores the need for robust cybersecurity measures. European cybersecurity agencies should prioritize awareness and mitigation strategies for this vulnerability to protect critical infrastructure and sensitive data.

6. Technical Details for Security Professionals

Vulnerable Function:

• orf_token_endian_convert in exec/totemsrp.c

Code Reference:

• The vulnerability is located around line 4677 in the totemsrp.c file.

Exploitation Details:

• The stack-based buffer overflow occurs when processing a large UDP packet. The overflow can lead to arbitrary code execution or denial of service.

References:

• NVD Entry
• GitHub Issue
• Corosync Official Website
• Source Code Reference

Aliases:

• CVE-2025-30472
• GHSA-4q2r-xgxr-vvqm

Assigner:

• Mitre

ENISA IDs:

• Product: 295ae666-ce21-33db-b20b-c9fe69d81888
• Vendor: 0f1bc80e-af3d-3afc-a379-821159982074

By addressing this vulnerability promptly and effectively, organizations can significantly reduce the risk of exploitation and ensure the security and stability of their high-availability clusters.