Editing Malware (section)

===Use of the same operating system===
Homogeneity can be a vulnerability. For example, when all computers in a [[Computer network|network]] run the same operating system, upon exploiting one, one [[Computer worm|worm]] can exploit them all:<ref name="UKan">"LNCS 3786 – Key Factors Influencing Worm Infection", U. Kanlayasiri, 2006, web (PDF): [https://doi.org/10.1007%2F11604938_5 SL40-PDF] {{Webarchive|url=https://web.archive.org/web/20230227061952/https://link.springer.com/chapter/10.1007/11604938_5|date=27 February 2023}}.</ref> In particular, [[Microsoft Windows]] or [[Mac OS X]] have such a large share of the market that an exploited vulnerability concentrating on either operating system could subvert a large number of systems. It is estimated that approximately 83% of malware infections between January and March 2020 were spread via systems running [[Windows 10]].<ref>{{Cite web|last=Cohen|first=Jason|date=2020-08-28|title=Windows Computers Account for 83% of All Malware Attacks in Q1 2020|url=https://au.pcmag.com/encryption/68294/windows-computers-account-for-83-of-all-malware-attacks-in-q1-2020|access-date=2021-12-02|website=PCMag Australia|language=en-au|archive-date=2 December 2021|archive-url=https://web.archive.org/web/20211202085917/https://au.pcmag.com/encryption/68294/windows-computers-account-for-83-of-all-malware-attacks-in-q1-2020|url-status=live}}</ref> This risk is mitigated by segmenting the networks into different [[subnetwork]]s and setting up [[Firewall (computing)|firewalls]] to block traffic between them.<ref>{{Cite book|last1=Wagner|first1=Neal|last2=Şahin|first2=Cem Ş.|last3=Winterrose|first3=Michael|last4=Riordan|first4=James|last5=Pena|first5=Jaime|last6=Hanson|first6=Diana|last7=Streilein|first7=William W.|title=2016 IEEE Symposium Series on Computational Intelligence (SSCI)|chapter=Towards automated cyber decision support: A case study on network segmentation for security|date=December 2016|chapter-url=https://ieeexplore.ieee.org/document/7849908|pages=1–10|doi=10.1109/SSCI.2016.7849908|isbn=978-1-5090-4240-1|s2cid=9065830|access-date=1 January 2022|archive-date=2 December 2021|archive-url=https://web.archive.org/web/20211202091053/https://ieeexplore.ieee.org/document/7849908/|url-status=live}}</ref><ref>{{Cite book|last1=Hemberg|first1=Erik|last2=Zipkin|first2=Joseph R.|last3=Skowyra|first3=Richard W.|last4=Wagner|first4=Neal|last5=O'Reilly|first5=Una-May|title=Proceedings of the Genetic and Evolutionary Computation Conference Companion|chapter=Adversarial co-evolution of attack and defense in a segmented computer network environment|date=2018-07-06|chapter-url=https://doi.org/10.1145/3205651.3208287|series=GECCO '18|location=New York, NY, USA|publisher=Association for Computing Machinery|pages=1648–1655|doi=10.1145/3205651.3208287|isbn=978-1-4503-5764-7|s2cid=51603533}}</ref>