How to remediate – dotProject Multiple Scripts Remote File Inclusion

1. Introduction

dotProject Multiple Scripts Remote File Inclusion is a vulnerability affecting the dotProject web application, allowing unauthenticated attackers to potentially view arbitrary files on the remote host or execute arbitrary PHP code. This impacts confidentiality, integrity and availability of the affected system. Systems running vulnerable versions of dotProject are at risk.

2. Technical Explanation

• Exploit mechanism: Attackers exploit the flaw by injecting malicious file paths into vulnerable parameters when ‘register_globals’ is enabled, leading to arbitrary file inclusion or execution of remote code.
• Scope: dotProject web application running on PHP servers with ‘register_globals’ enabled.

3. Detection and Assessment

Confirming vulnerability involves checking the dotProject version and verifying if PHP’s ‘register_globals’ setting is enabled. Scanning tools can also help identify vulnerable instances.

• Quick checks: Check the dotProject version in the application’s “About” section or configuration files. Verify ‘register_globals’ status using php -i | grep register_globals
• Scanning: Nessus plugin ID 8153914 may detect this vulnerability. This is an example only.
• Logs and evidence: Examine web server logs for suspicious file inclusion attempts or PHP code execution errors related to dotProject scripts.

php -i | grep register_globals

4. Solution / Remediation Steps

The primary solution is to disable PHP’s ‘register_globals’ setting as per the application’s installation instructions.

4.1 Preparation

• Ensure you have access to modify the PHP configuration file (php.ini). A roll back plan is to restore the original php.ini file.
• A change window may be needed depending on your environment and approval processes.

4.2 Implementation

1. Step 1: Open the PHP configuration file (php.ini) in a text editor.
2. Step 2: Locate the ‘register_globals’ setting.
3. Step 3: Change the value of ‘register_globals’ to Off. If it is commented out, uncomment it and set it to Off.
4. Step 4: Save the php.ini file.
5. Step 5: Restart your web server service for the changes to take effect.

4.3 Config or Code Example

Before

register_globals = On

After

register_globals = Off

4.4 Security Practices Relevant to This Vulnerability

Several security practices can help prevent this type of vulnerability.

• Practice 1: Input validation is crucial to block malicious code from being injected into parameters and scripts.
• Practice 2: Least privilege restricts the impact if an attacker successfully exploits a flaw.

4.5 Automation (Optional)

Automation of this fix may be possible using configuration management tools, but requires careful testing.

# Example Ansible task to modify php.ini
- name: Disable register_globals in php.ini
  lineinfile:
    path: /etc/php/7.4/apache2/php.ini # Adjust path as needed
    regexp: '^register_globals = On'
    line: 'register_globals = Off'
  notify: Restart Apache

5. Verification / Validation

Confirm the fix by checking that PHP’s ‘register_globals’ setting is disabled and re-testing for vulnerability.

• Post-fix check: Run php -i | grep register_globals, which should return no results or show ‘register_globals = Off’.
• Re-test: Attempt to exploit the vulnerability using a crafted URL. The attempt should fail and not result in file inclusion or code execution.
• Monitoring: Monitor web server logs for any suspicious activity related to PHP include errors.

php -i | grep register_globals

6. Preventive Measures and Monitoring

Regular security baselines, CI/CD pipeline checks, and a robust patch process can help prevent similar vulnerabilities.

• Baselines: Update your security baseline to include disabling ‘register_globals’ in PHP configurations.
• Asset and patch process: Implement a regular patch review cycle for all applications, including dotProject, to address known vulnerabilities promptly.

7. Risks, Side Effects, and Roll Back

Disabling ‘register_globals’ may cause compatibility issues with older code that relies on it.

• Risk or side effect 2: Disabling ‘register_globals’ may require code changes in some cases.
• Roll back: Restore the original php.ini file and restart your web server service to re-enable ‘register_globals’.

8. References and Resources

Links to official advisories and trusted documentation.

• Vendor advisory or bulletin: https://www.securityfocus.com/archive/1/424957/30/0/threaded
• NVD or CVE entry: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0754
• Product or platform documentation relevant to the fix: No specific documentation found for dotProject, refer to general PHP configuration guides.