EUVD-2024-49754

Comprehensive Technical Analysis of EUVD-2024-49754

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-49754, also known as CVE-2024-9142, is classified as an "External Control of File Name or Path" and "Incorrect Permission Assignment for Critical Resource" vulnerability in Olgu Computer Systems' e-Belediye software. The CVSS (Common Vulnerability Scoring System) base score of 9.4 indicates a critical severity level. The CVSS vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H provides the following insights:

• Attack Vector (AV:N): The vulnerability can be exploited over the network.
• Attack Complexity (AC:L): The attack is of low complexity.
• Authentication (AT:N): No authentication is required to exploit the vulnerability.
• Privileges Required (PR:L): Low privileges are required.
• User Interaction (UI:N): No user interaction is required.
• Confidentiality Impact (VC:H): High impact on confidentiality.
• Integrity Impact (VI:H): High impact on integrity.
• Availability Impact (VA:H): High impact on availability.
• Scope Change (SC:H): The vulnerability can affect resources beyond the security scope managed by the security authority.
• Scope Impact (SI:H): High impact on the scope.
• Scope Availability (SA:H): High impact on the availability within the changed scope.

2. Potential Attack Vectors and Exploitation Methods

The vulnerability allows attackers to manipulate web input to file system calls, potentially leading to unauthorized access, data manipulation, or denial of service. Possible attack vectors include:

• Path Traversal: Attackers can manipulate file paths to access unauthorized files or directories.
• File Injection: Attackers can inject malicious files into the system.
• Privilege Escalation: By exploiting incorrect permission assignments, attackers can escalate their privileges to gain higher access levels.

Exploitation methods may involve crafting specific HTTP requests that manipulate file names or paths, leading to unauthorized file operations.

3. Affected Systems and Software Versions

The vulnerability affects Olgu Computer Systems' e-Belediye software versions before 2.0.642. 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:

• Patch Management: Immediately update to e-Belediye version 2.0.642 or later.
• Access Controls: Implement strict access controls and least privilege principles to limit the scope of potential exploitation.
• Input Validation: Enhance input validation mechanisms to prevent manipulation of file names or paths.
• Network Segmentation: Segment the network to isolate critical systems and reduce the attack surface.
• Monitoring and Logging: Implement robust monitoring and logging to detect and respond to suspicious activities promptly.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations using the affected software, particularly those in the public sector and municipalities that rely on e-Belediye for municipal services. Successful exploitation could lead to data breaches, service disruptions, and potential legal and financial repercussions. The high CVSS score underscores the urgency for immediate remediation to protect critical infrastructure and sensitive data.

6. Technical Details for Security Professionals

Vulnerability Details:

• CWE (Common Weakness Enumeration): CWE-73 (External Control of File Name or Path) and CWE-732 (Incorrect Permission Assignment for Critical Resource).
• Exploitation: Attackers can manipulate web inputs to perform unauthorized file operations, potentially leading to data exfiltration, corruption, or system compromise.
• Detection: Security professionals should look for unusual file access patterns, unauthorized file modifications, and suspicious network traffic.
• Response: In case of detection, isolate affected systems, conduct a thorough forensic analysis, and apply necessary patches and mitigations.

References:

• Official Advisory: TR-CERT Advisory
• Vendor Information: Olgu Computer Systems

By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of cyber-attacks and ensure the integrity and security of their systems.