EUVD-2023-41516

Comprehensive Technical Analysis of EUVD-2023-41516

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The EUVD entry EUVD-2023-41516 describes a vulnerability in UVDesk Community Skeleton v1.1.1 that allows unauthenticated attackers to perform brute force attacks on the login page. This vulnerability can lead to unauthorized access to the application.

Severity Evaluation: The vulnerability has a CVSS Base Score of 9.8, which is classified as Critical. The CVSS vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates the following:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This high severity score underscores the critical nature of the vulnerability, as it can be exploited remotely with low complexity and without any user interaction, leading to significant impacts on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Brute Force Attack: An attacker can repeatedly attempt to log in using various username and password combinations until the correct credentials are found.
• Automated Scripts: Attackers can use automated scripts to perform brute force attacks, significantly increasing the speed and efficiency of the attack.

Exploitation Methods:

• Credential Stuffing: Using previously leaked credentials from other breaches to attempt to log in.
• Dictionary Attacks: Using a predefined list of common passwords to guess the correct credentials.
• Rainbow Table Attacks: Using precomputed tables to reverse cryptographic hash functions, which can be used to crack password hashes.

3. Affected Systems and Software Versions

Affected Software:

• UVDesk Community Skeleton v1.1.1

Affected Systems:

• Any system running UVDesk Community Skeleton v1.1.1, including web servers, cloud-based deployments, and on-premises installations.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Rate Limiting: Implement rate limiting on the login page to restrict the number of login attempts from a single IP address within a specific time frame.
• CAPTCHA: Add CAPTCHA challenges to the login page to prevent automated brute force attacks.
• Account Lockout: Implement account lockout policies after a certain number of failed login attempts.
• Two-Factor Authentication (2FA): Enforce 2FA for all user accounts to add an additional layer of security.

Long-Term Mitigation:

• Update Software: Upgrade to a patched version of UVDesk Community Skeleton that addresses this vulnerability.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.
• User Education: Educate users on the importance of strong, unique passwords and the risks associated with password reuse.

5. Impact on European Cybersecurity Landscape

Impact Analysis:

• Data Breaches: Unauthorized access can lead to data breaches, exposing sensitive information and violating data protection regulations such as GDPR.
• Reputation Damage: Organizations using the affected software may suffer reputational damage if a breach occurs.
• Financial Losses: Data breaches can result in financial losses due to fines, legal fees, and remediation costs.
• Operational Disruption: Successful exploitation can disrupt business operations, leading to downtime and loss of productivity.

Regulatory Compliance:

• GDPR Compliance: Organizations must ensure they comply with GDPR by implementing appropriate security measures to protect personal data.
• Incident Reporting: In case of a breach, organizations must report the incident to relevant authorities and affected individuals within the mandated timeframe.

6. Technical Details for Security Professionals

Technical Analysis:

• Vulnerability Type: Authentication Bypass
• Exploitability: High, due to the low complexity and lack of user interaction required.
• Detection: Monitor login attempts and look for patterns indicative of brute force attacks, such as multiple failed login attempts from a single IP address.
• Response: Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) to detect and block brute force attacks.
• Patch Management: Ensure that all software, including UVDesk Community Skeleton, is kept up-to-date with the latest security patches.

References:

• CVE-2023-37635: https://www.esecforte.com/cve-2023-37635-login-bruteforce/
• EPSS Score: 21, indicating a moderate likelihood of exploitation in the wild.

Conclusion: The vulnerability in UVDesk Community Skeleton v1.1.1 poses a significant risk to organizations using this software. Immediate mitigation strategies should be implemented to prevent unauthorized access and potential data breaches. Regular updates and security audits are essential to maintain a robust cybersecurity posture and comply with regulatory requirements.