CVE-2025-2263

Comprehensive Technical Analysis of CVE-2025-2263

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-2263

Description: The vulnerability exists in the "Sante PACS Server.exe" application, specifically during the login process. The OpenSSL function EVP_DecryptUpdate is used to decrypt the username and password, but a fixed 0x80-byte stack-based buffer is passed as the output buffer. This can lead to a stack-based buffer overflow if a long encrypted username or password is supplied by an unauthenticated remote attacker.

CVSS Score: 9.8

Severity Evaluation: The CVSS score of 9.8 indicates a critical vulnerability. This high score is due to the potential for remote code execution, the ease of exploitation, and the lack of authentication required to exploit the vulnerability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability over the network without needing any authentication.
• Buffer Overflow: By supplying a long encrypted username or password, an attacker can cause a buffer overflow, potentially leading to arbitrary code execution.

Exploitation Methods:

• Crafted Input: An attacker can craft a specially designed input (long encrypted username or password) to trigger the buffer overflow.
• Payload Delivery: Once the buffer overflow occurs, the attacker can inject malicious code to gain control over the system.

3. Affected Systems and Software Versions

Affected Systems:

• Systems running the "Sante PACS Server.exe" application.

Software Versions:

• Specific versions of the "Sante PACS Server.exe" that use the vulnerable implementation of the OpenSSL function EVP_DecryptUpdate.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Apply the latest security patches provided by the vendor to address the vulnerability.
• Input Validation: Implement strict input validation to ensure that the length of the username and password does not exceed the buffer size.
• Network Segmentation: Segment the network to limit the exposure of the vulnerable server to the internet.

Long-Term Mitigation:

• Code Review: Conduct a thorough code review to identify and fix similar vulnerabilities.
• Security Training: Provide training to developers on secure coding practices to prevent such vulnerabilities in the future.
• Regular Audits: Perform regular security audits and vulnerability assessments to identify and mitigate potential risks.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Data Breach: The vulnerability can lead to unauthorized access to sensitive medical data, resulting in a data breach.
• System Compromise: Attackers can gain control over the affected systems, leading to further compromise of the network.

Long-Term Impact:

• Reputation Damage: Organizations using the affected software may suffer reputational damage due to data breaches.
• Regulatory Compliance: Failure to address the vulnerability can result in non-compliance with regulatory requirements, leading to legal consequences.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: EVP_DecryptUpdate in OpenSSL.
• Buffer Size: Fixed 0x80-byte stack-based buffer.
• Trigger Condition: Long encrypted username or password.

Exploitation Steps:

1. Identify Target: Locate the "Sante PACS Server.exe" application on the network.
2. Craft Payload: Create a long encrypted username or password to trigger the buffer overflow.
3. Deliver Payload: Send the crafted input to the login function of the server.
4. Gain Control: Inject malicious code to gain control over the system.

Detection and Monitoring:

• Intrusion Detection Systems (IDS): Deploy IDS to monitor for unusual login attempts and buffer overflow patterns.
• Log Analysis: Regularly analyze logs for any suspicious activities related to the login process.
• Anomaly Detection: Implement anomaly detection mechanisms to identify deviations from normal behavior.

Conclusion: CVE-2025-2263 represents a critical vulnerability that can be exploited remotely without authentication. Organizations must prioritize patching and implementing robust security measures to mitigate the risk. Regular audits and adherence to secure coding practices are essential to prevent similar vulnerabilities in the future.