{"id":39717,"date":"2022-06-09T04:30:05","date_gmt":"2022-06-09T01:30:05","guid":{"rendered":"https:\/\/kutaybilen.com.tr\/?p=39717"},"modified":"2022-06-09T04:30:05","modified_gmt":"2022-06-09T01:30:05","slug":"amd-zen-3-cpulardaki-guvenlik-acigi-konusunda-uyardi","status":"publish","type":"post","link":"https:\/\/kutaybilen.com.tr\/?p=39717","title":{"rendered":"AMD, Zen 3 CPU&#8217;lardaki G\u00fcvenlik A\u00e7\u0131\u011f\u0131 Konusunda Uyard\u0131"},"content":{"rendered":"<p>Mikro\u00e7ip \u00fcreticisi AMD, \u015firketin en yeni <strong>Zen 3<\/strong> mimarili i\u015flemcilerini etkileyebilen potansiyel g\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda bir teknik inceleme yay\u0131nlad\u0131. <strong>&#8216;Yan kanal sald\u0131r\u0131s\u0131&#8217;<\/strong> olarak da bilinen g\u00fcvenlik a\u00e7\u0131\u011f\u0131, ge\u00e7ti\u011fimiz y\u0131llarda \u00e7ok say\u0131da Intel i\u015flemciyi etkileyen <strong>Spectre&#8217;yle<\/strong> benzerlik ta\u015f\u0131yor.<\/p>\n<p>ABD&#8217;li mikro\u00e7ip \u00fcreticisi, Zen 3 mimarisi ile birlikte y\u00fckleme ve depolama ortas\u0131ndaki ba\u011flant\u0131y\u0131 varsay\u0131m ederek komut \u00e7al\u0131\u015ft\u0131rma performans\u0131n\u0131 art\u0131rmaya yard\u0131mc\u0131 olan <strong>Predictive Store Forwarding (PSF)<\/strong> isimli yeni teknolojiyi tan\u0131tm\u0131\u015ft\u0131. \u015eirket, mak\u00fbs niyetli bireylerin Zen 3 mimarisine yan kanal ak\u0131nlar\u0131 ger\u00e7ekle\u015ftirmek i\u00e7in PSF&#8217;yi kullanabileceklerini s\u00f6yl\u00fcyor.<\/p>\n<p><b>AMD, \u015fimdi rastgele bir ata\u011fa rastlanmad\u0131\u011f\u0131n\u0131 s\u00f6yl\u00fcyor:<\/b><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.webtekno.com\/images\/editor\/default\/0003\/06\/de1ecbdde9f0cbb1969cf34581003da3d107a47d.jpeg\"\/><\/p>\n<p>Vakalar\u0131n bir\u00e7oklar\u0131nda PSF, y\u00fckleme sonucunu varsay\u0131m ederek bir performans art\u0131\u015f\u0131 sa\u011fl\u0131yor. AMD, PSF kestirimlerinin <strong>\u00e7o\u011fu vakit hakikat oldu\u011funu<\/strong> fakat birtak\u0131m durumlarda yanl\u0131\u015f CPU spek\u00fclasyonlar\u0131na neden olabilece\u011fini s\u00f6yl\u00fcyor.<\/p>\n<p>Bu noktada \u015firket, yanl\u0131\u015f bir PSF kestirimin meydana gelebilece\u011fi durumlar\u0131 ikiye ay\u0131r\u0131yor. Birincisi, bir program y\u00fcr\u00fct\u00fcl\u00fcrken <strong>y\u00fckleme ya da depolama<\/strong> <strong>adresinin<\/strong> de\u011fi\u015fmesi. \u015eirket ayr\u0131yeten PSF kestirim yap\u0131s\u0131nda bir <strong>takma isim (alias)<\/strong> varsa yanl\u0131\u015f PSF iddialar\u0131n\u0131n ortaya \u00e7\u0131kabilece\u011fini s\u00f6yl\u00fcyor.<\/p>\n<p>AMD, yapt\u0131\u011f\u0131 teknik incelemede, Predictive Store Forwarding (PSF)&#8217;in uygulama performans\u0131n\u0131 d\u00fczg\u00fcnle\u015ftirmeye yard\u0131mc\u0131 oldu\u011funu fakat birebir vakitte <strong>g\u00fcvenlik sorunlar\u0131n\u0131<\/strong> da beraberinde getirdi\u011fi sonucuna ula\u015ft\u0131. Bununla birlikte \u00e7ip \u00fcreticisi, PSF&#8217;nin yanl\u0131\u015f kestirimine kar\u015f\u0131 savunmas\u0131z oldu\u011fu d\u00fc\u015f\u00fcn\u00fclen rastgele bir kod g\u00f6rmedi\u011fini ve bu \u00e7e\u015fit bir zaafiyet hadisesinin bildirilmedi\u011fini de ekledi.<\/p>\n<p>Bu noktada \u015firket, \u015fimdi rastgele bir atak g\u00f6rmedi\u011finden kullan\u0131c\u0131lar\u0131n bu \u00f6zelli\u011fi <strong>\u015fimdilik a\u00e7\u0131k b\u0131rakmas\u0131n\u0131<\/strong> tavsiye ediyor. G\u00fcvenlik a\u00e7\u0131\u011f\u0131 konusunda endi\u015felenen t\u00fcketiciler ise PSF fonksiyonunu devre d\u0131\u015f\u0131 b\u0131rakabilir.<\/p>\n<div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Mikro\u00e7ip \u00fcreticisi AMD, \u015firketin en yeni Zen 3 mimarili i\u015flemcilerini etkileyebilen potansiyel g\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda bir teknik inceleme &#8230;<\/p>\n","protected":false},"author":1,"featured_media":39718,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[854],"tags":[1647],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts\/39717"}],"collection":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=39717"}],"version-history":[{"count":1,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts\/39717\/revisions"}],"predecessor-version":[{"id":39719,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts\/39717\/revisions\/39719"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/media\/39718"}],"wp:attachment":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=39717"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=39717"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=39717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}