EUVD-2024-50268

Comprehensive Technical Analysis of EUVD-2024-50268

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-50268 pertains to the Crypto plugin for WordPress, specifically versions up to and including 2.15. The issue is an authentication bypass vulnerability, which allows unauthenticated attackers to log in as any existing user, including administrators, if they have access to the username. This vulnerability arises from a limited arbitrary method call to the crypto_connect_ajax_process::log_in function within the crypto_connect_ajax_process function.

Severity Evaluation:

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

The high base score indicates a critical vulnerability. The CVSS vector string highlights the following characteristics:

• 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 vulnerability poses a significant risk due to its ease of exploitation and the severe impact on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Access: Attackers can exploit this vulnerability without needing any prior authentication.
• Network Access: The attack can be conducted over the network, making it accessible to remote attackers.

Exploitation Methods:

• Arbitrary Method Call: The attacker can make a limited arbitrary method call to the crypto_connect_ajax_process::log_in function.
• Username Knowledge: The attacker needs to know the username of the target user, which can often be obtained through enumeration techniques or social engineering.

Exploitation Steps:

1. Identify the target WordPress site using the Crypto plugin.
2. Obtain the username of an existing user, preferably an administrator.
3. Craft a request to the crypto_connect_ajax_process::log_in function with the target username.
4. Bypass authentication and gain unauthorized access to the user account.

3. Affected Systems and Software Versions

Affected Software:

• Crypto Plugin for WordPress: Versions up to and including 2.15

Affected Systems:

• Any WordPress installation using the vulnerable versions of the Crypto plugin.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Upgrade to a patched version of the Crypto plugin (if available).
• Disable the Plugin: Temporarily disable the Crypto plugin until a fix is released.
• Monitor Logs: Closely monitor access logs for any suspicious activity.

Long-Term Mitigations:

• Regular Updates: Ensure all plugins and WordPress core are regularly updated.
• Access Controls: Implement strong access controls and monitoring for administrative accounts.
• Security Plugins: Use security plugins like Wordfence to detect and mitigate vulnerabilities.
• User Enumeration Protection: Implement measures to prevent user enumeration.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant threat to the European cybersecurity landscape, particularly for organizations and individuals using WordPress with the Crypto plugin. The ease of exploitation and the potential for unauthorized access to administrative accounts can lead to data breaches, unauthorized modifications, and service disruptions. This underscores the importance of timely patching and proactive security measures.

6. Technical Details for Security Professionals

Vulnerable Code:

• The vulnerability is located in the crypto_connect_ajax_process function, specifically in the log_in method.
• Relevant code can be found in the class-crypto_connect_ajax_register.php file, particularly around lines 33 and 138 in version 2.10.

References:

• Wordfence Threat Intelligence: Wordfence Vulnerability Report
• WordPress Plugin Repository:
  • Line 33
  • Line 138

Aliases:

• CVE ID: CVE-2024-9989

Assigner:

• Wordfence

EPSS Score:

• 87: Indicates a high likelihood of exploitation in the wild.

ENISA IDs:

• Product: Crypto Tool (versions ≤2.15)
• Vendor: odude

This comprehensive analysis highlights the critical nature of the vulnerability and the urgent need for mitigation to protect against potential exploitation.