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CybersecurityManagementSecurity NewswireTechnologies & SolutionsSecurity Enterprise ServicesSecurity Leadership and ManagementLogical SecuritySecurity & Business ResilienceSecurity Education & TrainingCybersecurity News

CERT/CC releases information on vulnerabilities affecting open-source TCP/IP stacks

How Continous Is Continous Monitoring?
December 9, 2020

The CERT Coordination Center (CERT/CC) has released information on 33 vulnerabilities, known as AMNESIA:33, affecting multiple embedded open-source Transmission Control Protocol/Internet Protocol (TCP/IP) stacks. A remote attacker could exploit some of these vulnerabilities to take control of an affected system.

Embedded TCP/IP stacks provide essential network communication capability using TCP/IP networking to many lightweight operating systems adopted by IoT and other embedded devices. These software stacks can also be seen in the latest technologies such as Edge Computing. The following embedded TCP/IP stacks were discovered to have 33 memory related vulnerabilities included in this advisory:

  • uIP: https://github.com/adamdunkels/uip
  • Contiki-OS and Contiki-NG: https://www.contiki-ng.org/
  • PicoTCP and PicoTCP-NG: http://picotcp.altran.be
  • FNET: http://fnet.sourceforge.net/
  • Nut/OS: http://www.ethernut.de/en/software/

These software stacks can be integrated in various ways, including compiled from source, modified and integrated, and linked as a dynamic or static libraries, allowing for a wide variety of implementations. As an example, projects such as Apache Nuttx and open-iscsi have adopted common libraries and software modules, thus inheriting some of the vulnerabilities with varying levels of impact. The diversity of implementations and the lack of supply chain visibility has made it difficult to accurately assess the impact, usage as well as the potential exploitability of these vulnerabilities.

In general, most of these vulnerabilities are caused by memory management bugs, commonly seen in lightweight software implementations in Real Time Operating Systems (RTOS) and IoT devices. For specific details on the vulnerabilities introduced by these vulnerabilities, see the Forescout advisory that provides technical details.

 

KEYWORDS: cyber security Internet of Things (IoT) open source security risk management

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