CVE-2025-30236

Remediation/Mitigation Strategy for CVE-2025-30236

This document outlines the remediation and mitigation strategy for CVE-2025-30236, a critical vulnerability identified in Shearwater SecurEnvoy SecurAccess Enrol.

1. Vulnerability Description:

  • CVE ID: CVE-2025-30236
  • Affected Product: Shearwater SecurEnvoy SecurAccess Enrol
  • Affected Versions: Versions prior to 9.4.515
  • Description: Shearwater SecurEnvoy SecurAccess Enrol before version 9.4.515 allows authentication bypass. Specifically, it’s possible to authenticate using only a six-digit TOTP code, completely bypassing the password check, if an HTTP POST request includes a SESSION parameter. This effectively eliminates the password authentication requirement, granting unauthorized access.

2. Severity:

  • CVSS Score: 8.6 (High)
  • Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N (Network, Low Attack Complexity, No Privileges Required, No User Interaction, Unchanged Scope, High Confidentiality Impact, High Integrity Impact, No Availability Impact)
  • Severity Justification: The vulnerability allows an unauthenticated attacker to completely bypass the intended authentication mechanism. Successful exploitation grants full control over the affected user’s account, allowing access to sensitive information (High Confidentiality Impact) and the ability to modify account settings or perform actions on behalf of the user (High Integrity Impact).

3. Known Exploit:

  • Exploitability: Exploitation is considered straightforward. An attacker simply needs to craft an HTTP POST request to the authentication endpoint, including a SESSION parameter along with a valid TOTP code. No password is required.
  • Publicly Available Exploit: While a specific, ready-to-use exploit script may not be publicly available, the nature of the vulnerability is trivial to understand and exploit. An attacker with basic knowledge of HTTP requests and TOTP authentication can easily craft a working exploit.

4. Remediation Strategy:

  • Immediate Action: Upgrade SecurAccess Enrol to version 9.4.515 or later. This is the primary and most effective remediation. The vendor has patched the vulnerability in this version.

5. Mitigation Strategies (If immediate patching is not possible):

  • Web Application Firewall (WAF) Rule: Implement a WAF rule to inspect incoming HTTP POST requests to the authentication endpoint. The WAF rule should:
    • Block requests containing a SESSION parameter if the password field is empty or contains a default/placeholder value. This helps prevent exploitation by requiring both a TOTP and a password, even if the password is weak. However, this doesn’t completely solve the underlying vulnerability.
    • Rate limit requests to the authentication endpoint. This makes it harder for attackers to brute-force TOTP codes.
  • Monitor Authentication Logs: Enable detailed logging for all authentication attempts. Monitor these logs for:
    • Authentication attempts without a password value.
    • Unusually high numbers of failed authentication attempts from a single IP address.
    • Authentication attempts with a SESSION parameter where the password field is obviously incorrect or missing.
  • Disable SecurAccess Enrol (if possible): If the SecurAccess Enrol functionality is not critical, consider temporarily disabling it until the patch can be applied. This is the most secure approach if patching is delayed.

6. Long-Term Security Measures:

  • Regular Security Audits: Conduct regular security audits and penetration testing to identify and address vulnerabilities proactively.
  • Vulnerability Scanning: Implement automated vulnerability scanning to identify outdated software and potential security weaknesses.
  • Patch Management: Establish a robust patch management process to ensure that security updates are applied promptly.
  • Security Awareness Training: Educate users about phishing and other social engineering attacks, as these can be used to steal credentials.
  • Multi-Factor Authentication (MFA) Enforcement: Even after patching, ensure MFA is properly configured and enforced. This vulnerability highlighted a flaw in how MFA was handled. Implement strong password policies and encourage users to use complex passwords.

7. Communication Plan:

  • Internal Communication: Inform IT staff, security teams, and relevant stakeholders about the vulnerability and the planned remediation steps.
  • External Communication: If necessary (e.g., if there’s evidence of active exploitation), communicate the vulnerability and remediation steps to users.

8. Verification:

  • Post-Patch Verification: After applying the patch, thoroughly test the authentication process to verify that the vulnerability has been successfully resolved.
  • WAF Rule Verification: If implementing a WAF rule, test the rule to ensure it effectively blocks exploitation without causing false positives.

9. Rollback Plan:

  • Before applying the patch, create a system backup.
  • If the patch causes unexpected issues, be prepared to roll back to the previous version.

Important Considerations:

  • The effectiveness of the mitigation strategies depends on their correct implementation.
  • Mitigation strategies are not a substitute for patching. Patching should be the top priority.
  • Continuously monitor the security landscape for new threats and vulnerabilities.

Assigner

Date

  • Published Date: 2025-03-19 06:15:16
  • Updated Date: 2025-03-19 07:15:34

More Details

CVE-2025-30236