CVE-2017-14535:OS Command Injection Vulnerability in trixbox 2.8.0.4

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trixbox 2.8.0.4 contains a critical OS command injection vulnerability that allows remote attackers to execute arbitrary commands on the affected system. The vulnerability exists in the /maint/modules/home/index.php file, where the 'lang' parameter is not properly sanitized before being used in system commands, allowing attackers to inject shell metacharacters and execute malicious commands with the privileges of the web server.

Overview

This vulnerability (CVE-2017-14535) affects trixbox 2.8.0.4, a popular open-source PBX telephony platform based on Asterisk. The vulnerability is classified as CWE-78 (OS Command Injection) and has a high severity rating. An attacker can exploit this vulnerability by sending specially crafted HTTP requests with malicious shell metacharacters in the 'lang' parameter to the /maint/modules/home/index.php endpoint. Successful exploitation could lead to unauthorized command execution, information disclosure, service disruption, or complete system compromise. This vulnerability is particularly dangerous as it can be exploited remotely and requires minimal authentication in some configurations.

Remediation

  1. Upgrade to a newer version of the software if available, as trixbox 2.8.0.4 is no longer maintained.
  2. Consider migrating to alternative PBX solutions such as FreePBX, Elastix, or other actively maintained VoIP platforms.
  3. If upgrading is not immediately possible, implement the following mitigations:
    • Restrict access to the administrative interface using IP-based access controls
    • Deploy a Web Application Firewall (WAF) to filter malicious requests
    • Implement proper input validation for the 'lang' parameter in the affected file
    • Ensure the web server runs with minimal privileges
  4. Regularly monitor system logs for suspicious activities that might indicate exploitation attempts.
  5. Keep all system components updated with the latest security patches.

References

  1. Detailed vulnerability analysis and exploit details: https://secur1tyadvisory.wordpress.com/2018/02/11/trixbox-os-command-injection-vulnerability-cve-2017-14535/
  2. Exploit code and proof of concept: https://github.com/Hacker5preme/Exploits/tree/main/CVE-2017-14535-Exploit
  3. Security advisory with technical details: http://packetstormsecurity.com/files/162854/Trixbox-2.8.0.4-Remote-Code-Execution.html
  4. SecurityFocus vulnerability database entry: http://www.securityfocus.com/bid/103004
  5. Additional technical analysis: https://www.linkedin.com/pulse/trixbox-os-command-injection-vulnerability-sachin-wagh-ceh-ecsa-/?published=t
  6. Twitter announcement of the vulnerability: https://twitter.com/tiger_tigerboy/status/962689803270500352

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Accommodation & Food Services
    Accommodation & Food Services
  2. Administrative, Support, Waste Management & Remediation Services
    Administrative, Support, Waste Management & Remediation Services
  3. Agriculture, Forestry Fishing & Hunting
    Agriculture, Forestry Fishing & Hunting
  4. Arts, Entertainment & Recreation
    Arts, Entertainment & Recreation
  5. Construction
    Construction
  6. Educational Services
    Educational Services
  7. Finance and Insurance
    Finance and Insurance
  8. Health Care & Social Assistance
    Health Care & Social Assistance
  9. Information
    Information
  10. Management of Companies & Enterprises
    Management of Companies & Enterprises
  11. Manufacturing
    Manufacturing
  12. Mining
    Mining
  13. Other Services (except Public Administration)
    Other Services (except Public Administration)
  14. Professional, Scientific, & Technical Services
    Professional, Scientific, & Technical Services
  15. Public Administration
    Public Administration
  16. Real Estate Rental & Leasing
    Real Estate Rental & Leasing
  17. Retail Trade
    Retail Trade
  18. Transportation & Warehousing
    Transportation & Warehousing
  19. Utilities
    Utilities
  20. Wholesale Trade
    Wholesale Trade

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Armis Vulnerability Intelligence Database