^{CVE-2020-11907:}Length Parameter Inconsistency Vulnerability in Treck TCP/IP Stack

Overview

The vulnerability exists due to inconsistent handling of length parameters within the TCP implementation of the Treck TCP/IP stack. When processing TCP packets, the stack fails to properly validate length parameters, which can lead to memory corruption issues. This vulnerability is particularly concerning because the Treck TCP/IP stack is embedded in numerous devices across multiple vendors and industries, potentially affecting millions of devices worldwide. As part of the Ripple20 vulnerabilities, this issue has widespread impact across industrial control systems, medical devices, energy sector equipment, enterprise networking gear, and consumer IoT devices. Successful exploitation could allow attackers to crash affected devices, cause denial of service conditions, or potentially execute arbitrary code.

Remediation

1. Update to Treck TCP/IP stack version 6.0.1.66 or later, which contains fixes for this vulnerability.
2. If direct updates are not possible, contact the device manufacturer for firmware updates that incorporate the patched Treck stack.
3. Network segmentation should be implemented to isolate vulnerable devices.
4. Deploy network monitoring solutions to detect exploitation attempts.
5. Consider implementing network-level protections such as firewalls and intrusion detection/prevention systems to filter potentially malicious traffic.
6. For critical systems where patching is not immediately possible, consider additional compensating controls such as limiting network exposure and implementing more stringent access controls.
7. Regularly check vendor advisories from affected manufacturers including Cisco, Dell, HPE, NetApp, and Aruba Networks for specific update information.

References

1. JSOF Ripple20 Technical Details: https://www.jsof-tech.com/ripple20/
2. CERT Vulnerability Note VU#257161: https://www.kb.cert.org/vuls/id/257161/
3. Treck Vendor Advisory: https://www.treck.com
4. Cisco Security Advisory: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-treck-ip-stack-JyBQ5GyC
5. Dell Response to Ripple20: https://www.dell.com/support/article/de-de/sln321836/dell-response-to-the-ripple20-vulnerabilities
6. HPE Security Bulletin: https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=hpesbhf04012en_us
7. NetApp Security Advisory: https://security.netapp.com/advisory/ntap-20200625-0006/
8. Aruba Networks Advisory: http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-006.txt