EUVD-2023-30916

Comprehensive Technical Analysis of EUVD-2023-30916

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2023-30916 pertains to the TSplus Remote Work 16.0.0.0 software, which inadvertently exposes a cleartext password in the HTML source code of its secure single sign-on web portal. This exposure occurs on the "var pass" line, making it easily accessible to anyone who can view the source code of the web page.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• Base Score Version: 3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The CVSS score of 9.8 indicates a critical vulnerability. The vector string highlights several key factors:

• 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): None (N) - No special privileges are needed to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - There is a high impact on confidentiality.
• Integrity (I): High (H) - There is a high impact on integrity.
• Availability (A): High (H) - There is a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: An attacker can exploit this vulnerability remotely by accessing the web portal and viewing the HTML source code.
• Phishing and Social Engineering: Attackers could trick users into visiting a malicious site that mimics the legitimate portal, capturing the cleartext password.

Exploitation Methods:

• Source Code Inspection: By simply viewing the HTML source code of the web portal, an attacker can extract the cleartext password.
• Automated Scripts: Attackers can write scripts to automate the process of accessing the web portal and extracting the password.

3. Affected Systems and Software Versions

Affected Software:

• TSplus Remote Work 16.0.0.0

Note: The vulnerability is specific to the TSplus Remote Work product and does not affect the TSplus Remote Access product, which is covered under a different CVE (CVE-2023-31069).

4. Recommended Mitigation Strategies

Immediate Actions:

• Patch Management: Apply the latest patches and updates provided by the vendor to mitigate the vulnerability.
• Code Review: Conduct a thorough code review to ensure that no sensitive information is exposed in the HTML source code.
• Access Controls: Implement strict access controls to limit who can access the web portal.

Long-Term Strategies:

• Encryption: Ensure that all sensitive data, including passwords, are encrypted both in transit and at rest.
• Security Audits: Regularly perform security audits and penetration testing to identify and fix vulnerabilities.
• User Education: Educate users about the risks of phishing and social engineering attacks.

5. Impact on European Cybersecurity Landscape

The exposure of cleartext passwords in a widely used remote work solution poses significant risks to organizations across Europe. Given the critical nature of the vulnerability, it could lead to unauthorized access, data breaches, and potential financial losses. The European cybersecurity landscape must prioritize the implementation of robust security measures to protect against such vulnerabilities, especially in the context of remote work solutions that have become increasingly prevalent.

6. Technical Details for Security Professionals

Vulnerability Details:

• Location: The cleartext password is located on the "var pass" line in the HTML source code of the secure single sign-on web portal.
• Exposure: The password is exposed in plaintext, making it easily accessible to anyone who can view the source code.

Detection and Monitoring:

• Log Analysis: Monitor logs for any unusual access patterns or attempts to view the HTML source code.
• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on any suspicious activities related to the web portal.

Incident Response:

• Containment: Immediately contain the affected systems by restricting access to the web portal.
• Eradication: Remove the cleartext password from the HTML source code and apply necessary patches.
• Recovery: Ensure that all systems are updated and that no further vulnerabilities exist.

References:

• Packet Storm Security

Aliases:

• CVE-2023-27132
• GSD-2023-27132

Assigner:

• Mitre

EPSS:

• N/A

ENISA ID Product and Vendor:

• Product ID: fec03c4d-6cb6-3c89-af6f-22ad7ec04d89
• Vendor ID: 166c9cd4-bcca-326f-8805-0a278ba14830

By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of unauthorized access and data breaches, thereby enhancing their overall cybersecurity posture.