{"id":18805,"date":"2022-04-30T00:06:06","date_gmt":"2022-04-29T21:06:06","guid":{"rendered":"https:\/\/kutaybilen.com.tr\/?p=18805"},"modified":"2022-04-30T00:06:06","modified_gmt":"2022-04-29T21:06:06","slug":"ramler-rowhammer-taarruzlarina-karsi-hala-savunmasiz","status":"publish","type":"post","link":"https:\/\/kutaybilen.com.tr\/?p=18805","title":{"rendered":"RAM&#8217;ler Rowhammer Taarruzlar\u0131na Kar\u015f\u0131 Hala Savunmas\u0131z"},"content":{"rendered":"<p>Yeni bir ara\u015ft\u0131rma, bilgisayarlarda ve ak\u0131ll\u0131 telefonlarda kullan\u0131lan <strong>RAM<\/strong>&#39;lerin\u00a0son alt\u0131 y\u0131ld\u0131r \u00fcreticiler taraf\u0131ndan al\u0131nan tedbirlere kar\u015f\u0131n Rowhammer ak\u0131nlar\u0131na kar\u015f\u0131 hala savunmas\u0131z oldu\u011funu ortaya koydu.\u00a0\u00dcreticilerin ald\u0131\u011f\u0131 tedbirler, RAM&#39;lerin dizayn\u0131na eklenen yaz\u0131l\u0131m ve donan\u0131m d\u00fczeltmelerini i\u00e7eriyor lakin g\u00f6r\u00fcn\u00fc\u015fe nazaran tedbirler hala yetersiz.<\/p>\n<p>G\u00fcn\u00fcm\u00fcz\u00fcn \u00e7a\u011fda\u015f RAM&#39;lerinde, bilgisayar\u0131n\u0131z\u0131n belle\u011fi i\u00e7indeki veriler\u00a0her i\u015flendi\u011finde, anl\u0131k bilgiler <strong>bellek h\u00fccrelerinin<\/strong> i\u00e7ine kaydediliyor. Bu bellek h\u00fccrelerinin her biri, kart\u0131n taban\u0131nda bulunan \u0131zgara gibisi yap\u0131larda yer al\u0131yor. Fakat bu tasar\u0131m, bellek h\u00fccreleri ortas\u0131nda <strong>elektriksel parazit<\/strong>\u00a0olu\u015fma m\u00fcmk\u00fcnl\u00fc\u011f\u00fcn\u00fc da art\u0131r\u0131yor.<\/p>\n<p><b>DDR3 ve DDR4 RAM&#39;leri etkiliyor<\/b><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.webtekno.com\/images\/editor\/default\/0002\/50\/e88cca2d6b0b032b6aa3c84de5415e82ac73f1b8.jpeg\"\/><\/p>\n<p>Rowhammer sald\u0131r\u0131s\u0131 bir bellek \u00fczerinde \u00e7ok s\u00fcratli <strong>okuma\/yazma<\/strong> s\u00fcre\u00e7leri ger\u00e7ekle\u015ftirerek elektriksel parazitler olu\u015fmas\u0131n\u0131 sa\u011fl\u0131yor. Taarruzun ard\u0131ndan\u00a0RAM&#39;in i\u00e7inde saklanan datalar bozulabiliyor yahut de\u011fi\u015ftirilebiliyor. Yani Rowhammer, bilgisayarlardaki datalar\u0131 de\u011fi\u015ftirmek yahut \u00e7almak i\u00e7in kullan\u0131labiliyor.<\/p>\n<p>Yap\u0131lan ara\u015ft\u0131rma, Rowhammer sald\u0131r\u0131s\u0131n\u0131n DDR3 ve DDR4 bellek kartlar\u0131nda depolanan bilgileri nas\u0131l de\u011fi\u015ftirebilece\u011fini g\u00f6sterdi.\u00a0Ara\u015ft\u0131rma grubu <strong>43 DIMM<\/strong>\u00a0(\u00c7ift S\u0131ral\u0131 Bellek Mod\u00fcl\u00fc)\u00a0test etti\u00a0ve \u00fc\u00e7 b\u00fcy\u00fck DRAM sat\u0131c\u0131s\u0131ndan (Samsung, Hynix ve Micron) 13 DIMM&#39;in Rowhammer taarruzlar\u0131na kar\u015f\u0131 savunmas\u0131z oldu\u011funu ortaya \u00e7\u0131kard\u0131.<\/p>\n<p><b>Ak\u0131ll\u0131 telefonlar da tehlikede<\/b><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.webtekno.com\/images\/editor\/default\/0002\/50\/bbd4f3ef67f8e3c7194e43c94e7a3ac5ff58853c.png\"\/><\/p>\n<p>Ara\u015ft\u0131rmac\u0131lar,\u00a0ak\u0131ll\u0131 telefonlarda bulunan <strong>LPDDR4 RAM<\/strong>&#39;lerin de RowHammer ataklar\u0131ndan etkilendi\u011fini ortaya koydu. Testlerde, \u00fcstte g\u00f6rebilece\u011finiz gibi\u00a0Google, LG, OnePlus ve Samsung ak\u0131ll\u0131 telefonlarda kullan\u0131lan LPDDR4 bellek kartlar\u0131na kar\u015f\u0131 Rowhammer ak\u0131nlar\u0131 yap\u0131ld\u0131.<\/p>\n<p>Uzmanlar, ak\u0131ll\u0131 telefonlarda ve bilgisayarlarda kullan\u0131lan bu RAM&#39;lere web, GPU kartlar\u0131, a\u011f paketleri, depolama, ta\u015f\u0131nabilir uygulamalar ve hatta <strong>Microsoft Edge<\/strong> taray\u0131c\u0131s\u0131 \u00fczerinden Rowhammer sald\u0131r\u0131s\u0131 d\u00fczenlediler.\u00a0Raporda, bu g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131n kapat\u0131lmas\u0131n\u0131n uzun vakit alaca\u011f\u0131 belirtildi.<\/p>\n<p>ETH Z\u00fcrih ve Amsterdam&#39;daki Vrije \u00dcniversitesi&#39;nden akademisyenlerden olu\u015fan ara\u015ft\u0131rma grubu, h\u00fccumlardan etkilenen t\u00fcm \u00fcreticileri bilgilendirdiklerini belirtti.<\/p>\n<div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Yeni bir ara\u015ft\u0131rma, bilgisayarlarda ve ak\u0131ll\u0131 telefonlarda kullan\u0131lan RAM&#39;lerin\u00a0son alt\u0131 y\u0131ld\u0131r \u00fcreticiler taraf\u0131ndan al\u0131nan tedbirlere &#8230;<\/p>\n","protected":false},"author":1,"featured_media":18806,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[851],"tags":[1325,1806,2185],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts\/18805"}],"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=18805"}],"version-history":[{"count":1,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts\/18805\/revisions"}],"predecessor-version":[{"id":18807,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts\/18805\/revisions\/18807"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/media\/18806"}],"wp:attachment":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}