NIST 800-171_3.14.2

NIST 800-171



Provide protection from malicious code at designated locations within organizational systems

Designated locations include system entry and exit points which may include firewalls remote-access servers workstations electronic mail servers web servers proxy servers notebook computers and mobile devices. Malicious code includes viruses worms Trojan horses and spyware. Malicious code can be encoded in various formats (e.g. UUENCODE Unicode) contained within compressed or hidden files or hidden in files using techniques such as steganography. Malicious code can be inserted into systems in a variety of ways including web accesses electronic mail electronic mail attachments and portable storage devices. Malicious code insertions occur through the exploitation of system vulnerabilities.Malicious code protection mechanisms include anti-virus signature definitions and reputation-based technologies. A variety of technologies and methods exist to limit or eliminate the effects of malicious code. Pervasive configuration management and comprehensive software integrity controls may be effective in preventing execution of unauthorized code. In addition to commercial off-the-shelf software malicious code may also be present in custom-built software. This could include logic bombs back doors and other types of cyber-attacks that could affect organizational missions/business functions. Traditional malicious code protection mechanisms cannot always detect such code. In these situations organizations rely instead on other safeguards including secure coding practices configuration management and control trusted procurement processes and monitoring practices to help ensure that software does not perform functions other than the functions intended.[SP 800-83] provides guidance on malware incident prevention.


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