{"id":477439,"date":"2023-08-09T09:14:50","date_gmt":"2023-08-09T09:14:50","guid":{"rendered":""},"modified":"2023-09-05T11:14:42","modified_gmt":"2023-09-05T11:14:42","slug":"heap-spraying","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/tr\/wiki\/heap-spraying\/","title":{"rendered":"Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme"},"content":{"rendered":"<p>Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme, bilgisayar kullan\u0131m\u0131 d\u00fcnyas\u0131nda kullan\u0131lan, yayg\u0131n olarak tan\u0131nan bir tekniktir. Bu \u00f6ncelikle, arabellek ta\u015fmas\u0131 gibi g\u00fcvenlik a\u00e7\u0131klar\u0131ndan yararlan\u0131ld\u0131\u011f\u0131nda rastgele kod y\u00fcr\u00fctme olas\u0131l\u0131\u011f\u0131n\u0131 art\u0131rmak i\u00e7in bir i\u015flemin y\u0131\u011f\u0131n belle\u011finin bir b\u00f6lgesinin kabuk koduyla doldurulmas\u0131n\u0131 i\u00e7erir.<\/p>\n<h2>Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtmenin Tarih\u00e7esi ve \u0130lk S\u00f6z\u00fc<\/h2>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme ilk olarak Matt Conover ve Oded Horovitz taraf\u0131ndan yaz\u0131lan ve 2000&#039;li y\u0131llar\u0131n ba\u015f\u0131nda yay\u0131nlanan \u201cY\u0131\u011f\u0131n P\u00fcsk\u00fcrtme: Ortak G\u00fcvenlik \u00d6nlemlerine Kar\u015f\u0131 Bir Teknik\u201d ba\u015fl\u0131kl\u0131 bir g\u00fcvenlik belgesinde kamuoyunun dikkatine sunuldu. Ba\u015flang\u0131c\u0131, \u00e7al\u0131\u015fan bir i\u015flemin adres alan\u0131n\u0131 rastgele hale getirmek ve b\u00f6ylece sald\u0131rganlar\u0131n kabuk kodlar\u0131n\u0131n bellekte nerede bulunaca\u011f\u0131n\u0131 tahmin etmesini zorla\u015ft\u0131rmak i\u00e7in tasarlanm\u0131\u015f g\u00fcvenlik mekanizmalar\u0131n\u0131n giderek daha fazla uygulanmas\u0131yla ger\u00e7ekle\u015fti.<\/p>\n<h2>Konuyu Geni\u015fletmek: Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme<\/h2>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme \u00f6ncelikle bellek bozulmas\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131ndan yararlanmak i\u00e7in kullan\u0131l\u0131r. Amac\u0131, bir s\u00fcrecin y\u0131\u011f\u0131n\u0131n\u0131, sald\u0131rgan\u0131n kabuk kodunun s\u00fcrecin b\u00fcy\u00fck bir b\u00f6l\u00fcm\u00fcne yay\u0131lmas\u0131n\u0131 sa\u011flayacak \u015fekilde manip\u00fcle etmektir. Bu, y\u0131\u011f\u0131n i\u00e7inde her biri istenen kabuk kodunun bir kopyas\u0131n\u0131 ta\u015f\u0131yan birden fazla nesne veya \u00f6rnek olu\u015fturularak yap\u0131l\u0131r.<\/p>\n<p>Bu teknik genellikle rastgele kod y\u00fcr\u00fct\u00fclmesine izin veren di\u011fer istismarlarla birlikte kullan\u0131l\u0131r. Bununla birlikte, bu istismarlarla ilgili sorun, genellikle y\u00fcr\u00fct\u00fclecek kodun tam bellek konumu hakk\u0131nda bilgi gerektirmesidir; bu da \u00e7e\u015fitli g\u00fcvenlik \u00f6nlemleri nedeniyle tespit edilmesi zor olabilir. Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme, y\u0131\u011f\u0131n\u0131n \u00f6nemli bir b\u00f6l\u00fcm\u00fcn\u00fc gerekli kabuk koduyla doldurarak bu sorunu \u00e7\u00f6zer, b\u00f6ylece istismar\u0131n kodun y\u00fcr\u00fct\u00fclmesini tetikleme \u015fans\u0131n\u0131 istatistiksel olarak art\u0131r\u0131r.<\/p>\n<h2>Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtmenin \u0130\u00e7 Yap\u0131s\u0131<\/h2>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme iki a\u015famal\u0131 bir i\u015flemle \u00e7al\u0131\u015f\u0131r:<\/p>\n<ol>\n<li>\n<p><strong>Sprey<\/strong>: Y\u0131\u011f\u0131n belle\u011fi istenen kabuk kodunun birden \u00e7ok \u00f6rne\u011fiyle doldurulur. Bu, kabuk kodunu ta\u015f\u0131yan nesneler veya \u00f6rnekler olu\u015fturularak yap\u0131l\u0131r ve bunlar daha sonra y\u0131\u011f\u0131n\u0131n farkl\u0131 bellek adreslerine tahsis edilir.<\/p>\n<\/li>\n<li>\n<p><strong>Tetiklemek<\/strong>: Rastgele kod y\u00fcr\u00fctmek i\u00e7in bir g\u00fcvenlik a\u00e7\u0131\u011f\u0131ndan yararlan\u0131l\u0131r. Bellek kabuk kodu \u00f6rnekleriyle dolduruldu\u011fundan, y\u00fcr\u00fct\u00fclen kodun sald\u0131rgan\u0131n kabuk kodu olma olas\u0131l\u0131\u011f\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde artar.<\/p>\n<\/li>\n<\/ol>\n<h2>Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtmenin Temel \u00d6zellikleri<\/h2>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtmenin temel \u00f6zellikleri \u015funlard\u0131r:<\/p>\n<ul>\n<li>B\u00fcy\u00fck \u00f6l\u00e7\u00fcde y\u00fckten ba\u011f\u0131ms\u0131zd\u0131r, bu da neredeyse her t\u00fcr kabuk kodunu y\u00fcr\u00fctmek i\u00e7in kullan\u0131labilece\u011fi anlam\u0131na gelir.<\/li>\n<li>G\u00fcvenlik a\u00e7\u0131klar\u0131ndan yararlan\u0131rken ba\u015far\u0131l\u0131 kod y\u00fcr\u00fctme olas\u0131l\u0131\u011f\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131r\u0131r.<\/li>\n<li>Tam bellek adreslerinin bilinmesini gerektirmeyerek adres alan\u0131 d\u00fczeni rastgelele\u015ftirmesi (ASLR) gibi belirli g\u00fcvenlik \u00f6nlemlerini atlar.<\/li>\n<\/ul>\n<h2>Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme \u00c7e\u015fitleri<\/h2>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtmenin \u00e7e\u015fitli \u00e7e\u015fitleri vard\u0131r ve her biri y\u0131\u011f\u0131n\u0131 p\u00fcsk\u00fcrtmek i\u00e7in kullan\u0131lan y\u00f6ntemlere g\u00f6re farkl\u0131l\u0131k g\u00f6sterir. \u0130\u015fte birka\u00e7 t\u00fcr:<\/p>\n<table>\n<thead>\n<tr>\n<th>Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme Tipi<\/th>\n<th>Tan\u0131m<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Klasik Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme<\/strong><\/td>\n<td>Her biri kabuk kodunu i\u00e7eren bellek bloklar\u0131n\u0131n tekrarlanan tahsisini i\u00e7erir.<\/td>\n<\/tr>\n<tr>\n<td><strong>S\u0131ral\u0131 Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme<\/strong><\/td>\n<td>B\u00fcy\u00fck bir bellek blo\u011fu ay\u0131r\u0131r ve onu kabuk koduyla doldurur.<\/td>\n<\/tr>\n<tr>\n<td><strong>NOP-k\u0131zak Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme<\/strong><\/td>\n<td>Ba\u015far\u0131 oran\u0131n\u0131 art\u0131rmak i\u00e7in kabuk kodundan \u00f6nce bir NOP k\u0131za\u011f\u0131 (bir dizi i\u015flem yapmama talimat\u0131) kullan\u0131r.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtmeyi Kullanma Yollar\u0131, Sorunlar ve \u00c7\u00f6z\u00fcmleri<\/h2>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme \u00f6ncelikle g\u00fcvenlikten yararlanma ba\u011flam\u0131nda, \u00f6zellikle de bellek bozulmas\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131ndan yararlanmada kullan\u0131l\u0131r. \u00d6zellikle rastgele kod y\u00fcr\u00fct\u00fclmesine izin veren g\u00fcvenlik a\u00e7\u0131klar\u0131yla birlikte g\u00fc\u00e7l\u00fc bir tekniktir.<\/p>\n<p>Ancak y\u0131\u011f\u0131n p\u00fcsk\u00fcrtmenin kullan\u0131m\u0131n\u0131n zorluklar\u0131 da vard\u0131r. Sorunlardan biri, y\u0131\u011f\u0131n boyutu artt\u0131k\u00e7a tekni\u011fin daha tespit edilebilir hale gelmesidir. Di\u011fer bir zorluk ise, kabuk kodunun y\u0131\u011f\u0131ndan y\u00fcr\u00fct\u00fclmesini zorla\u015ft\u0131ran ASLR ve DEP (Veri Y\u00fcr\u00fctme Engellemesi) gibi istismar azaltma tekniklerinin giderek daha fazla uygulanmas\u0131d\u0131r.<\/p>\n<p>Bu zorluklar\u0131n \u00fcstesinden gelmek i\u00e7in sald\u0131rganlar, y\u0131\u011f\u0131n\u0131 \u00e7al\u0131\u015ft\u0131r\u0131labilir hale getirmek i\u00e7in tam zaman\u0131nda derleyicilerden yararlanan JIT p\u00fcsk\u00fcrtme gibi daha karma\u015f\u0131k y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme y\u00f6ntemlerine ba\u015fvurabilir. \u00d6te yandan g\u00fcvenlik uygulay\u0131c\u0131lar\u0131n\u0131n s\u00fcrekli olarak yeni hafifletme tekniklerini iyile\u015ftirmesi ve geli\u015ftirmesi gerekiyor.<\/p>\n<h2>Ana \u00d6zellikler ve Benzer Terimlerle Kar\u015f\u0131la\u015ft\u0131rmalar<\/h2>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme genellikle y\u0131\u011f\u0131n par\u00e7alama ve geri d\u00f6n\u00fc\u015f odakl\u0131 programlama (ROP) gibi benzer kullan\u0131m teknikleriyle kar\u015f\u0131la\u015ft\u0131r\u0131l\u0131r ve kar\u015f\u0131la\u015ft\u0131r\u0131l\u0131r.<\/p>\n<table>\n<thead>\n<tr>\n<th>Teknik<\/th>\n<th>Tan\u0131m<\/th>\n<th>Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme ile Benzerlikler\/Farkl\u0131l\u0131klar<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Y\u0131\u011f\u0131n Par\u00e7alama<\/strong><\/td>\n<td>Program\u0131n y\u00fcr\u00fct\u00fclmesini de\u011fi\u015ftirmek i\u00e7in y\u0131\u011f\u0131n\u0131n bozulmas\u0131n\u0131 i\u00e7erir.<\/td>\n<td>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtmenin aksine, y\u0131\u011f\u0131n par\u00e7alama, kesin bellek d\u00fczeni bilgisini gerektirir.<\/td>\n<\/tr>\n<tr>\n<td><strong>D\u00f6n\u00fc\u015f Odakl\u0131 Programlama (ROP)<\/strong><\/td>\n<td>K\u00f6t\u00fc ama\u00e7l\u0131 eylemler ger\u00e7ekle\u015ftirmek i\u00e7in mevcut kod par\u00e7ac\u0131klar\u0131n\u0131n (ara\u00e7lar) kullan\u0131lmas\u0131n\u0131 i\u00e7erir.<\/td>\n<td>ROP, y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme gibi DEP&#039;yi atlayabilir ancak belle\u011fin kabuk koduyla doldurulmas\u0131n\u0131 gerektirmez.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtmeyle \u0130lgili Gelece\u011fin Perspektifleri ve Teknolojileri<\/h2>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme bir tehdit olmaya devam ederken, gelecek daha etkili azaltma stratejilerine i\u015faret ediyor. Kontrol Ak\u0131\u015f\u0131 B\u00fct\u00fcnl\u00fc\u011f\u00fc (CFI) ve geli\u015ftirilmi\u015f ASLR gibi teknikler, g\u00fcvenlik a\u00e7\u0131klar\u0131ndan yararlanmay\u0131 daha da zorla\u015ft\u0131rabilir. Ek olarak, y\u0131\u011f\u0131ndaki anormal davran\u0131\u015flar\u0131 daha iyi tespit etmek i\u00e7in makine \u00f6\u011frenimi ve yapay zeka algoritmalar\u0131 kullan\u0131labilir.<\/p>\n<p>\u00d6te yandan, teknoloji ilerledik\u00e7e sald\u0131rganlar, JIT p\u00fcsk\u00fcrtme ve serbest kullan\u0131m sonras\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131 gibi kendilerine \u00f6zg\u00fc zorluklar yaratan daha karma\u015f\u0131k tekniklere ba\u015fvurabilirler.<\/p>\n<h2>Proxy Sunucular\u0131 ve Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme<\/h2>\n<p>Proxy sunucular\u0131n\u0131n kendileri do\u011frudan y\u0131\u011f\u0131n p\u00fcsk\u00fcrtmeyle ili\u015fkili de\u011fildir. Ancak y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme kullanan sald\u0131r\u0131lar\u0131n hem ger\u00e7ekle\u015ftirilmesinde hem de hafifletilmesinde rol oynayabilirler.<\/p>\n<p>Sald\u0131rgan\u0131n bak\u0131\u015f a\u00e7\u0131s\u0131na g\u00f6re, proxy sunucular konumlar\u0131n\u0131 gizlemek ve sald\u0131r\u0131n\u0131n izlenmesini zorla\u015ft\u0131rmak i\u00e7in kullan\u0131labilir. Savunma taraf\u0131nda, proxy sunucular daha b\u00fcy\u00fck bir g\u00fcvenlik altyap\u0131s\u0131n\u0131n par\u00e7as\u0131 olabilir, trafik verilerini analiz i\u00e7in g\u00fcnl\u00fc\u011fe kaydedebilir, bu da anormal davran\u0131\u015flar\u0131n veya potansiyel istismarlar\u0131n erken a\u015famalar\u0131nda tespit edilmesine yard\u0131mc\u0131 olabilir.<\/p>\n<h2>\u0130lgili Ba\u011flant\u0131lar<\/h2>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme ve ilgili konular hakk\u0131nda daha fazla bilgi i\u00e7in a\u015fa\u011f\u0131daki kaynaklara ba\u015fvurabilirsiniz:<\/p>\n<ul>\n<li>Conover, M. ve Horovitz, O. (2004). Y\u0131\u011f\u0131n P\u00fcsk\u00fcrtme: Ortak G\u00fcvenlik \u00d6nlemlerine Kar\u015f\u0131 Bir Teknik. G\u00fcvenlik Ka\u011f\u0131d\u0131.<\/li>\n<li>OWASP (A\u00e7\u0131k Web Uygulama G\u00fcvenli\u011fi Projesi) \u00fczerinde \u201cY\u0131\u011f\u0131n P\u00fcsk\u00fcrtme\u201d: <a href=\"https:\/\/www.owasp.org\/index.php\/Heap_spraying\" target=\"_new\" rel=\"noopener nofollow\">https:\/\/www.owasp.org\/index.php\/Heap_spraying<\/a><\/li>\n<li>Mozilla Geli\u015ftirici A\u011f\u0131&#039;nda (MDN) &quot;Bellek g\u00fcvenli\u011fi&quot;: <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Memory_safety\" target=\"_new\" rel=\"noopener nofollow\">https:\/\/developer.mozilla.org\/en-US\/docs\/Memory_safety<\/a><\/li>\n<li>Microsoft G\u00fcvenlik Yan\u0131t Merkezi&#039;nde (MSRC) &quot;Windows 8&#039;deki Azaltma \u0130yile\u015ftirmelerinden Yararlanma&quot;: <a href=\"https:\/\/msrc.microsoft.com\/update-guide\/en-us\/\" target=\"_new\" rel=\"noopener nofollow\">https:\/\/msrc.microsoft.com\/update-guide\/en-us\/<\/a><\/li>\n<\/ul>\n<p>Y\u0131\u011f\u0131n p\u00fcsk\u00fcrtme ve benzer teknikleri anlaman\u0131n, bilgisayar belle\u011fi y\u00f6netimi ve programlama dilleri konusunda sa\u011flam bir bilgi birikimi gerektirdi\u011fini l\u00fctfen unutmay\u0131n. Her zaman en son g\u00fcvenlik \u00f6nlemleri ve azaltma stratejileri konusunda g\u00fcncel kald\u0131\u011f\u0131n\u0131zdan emin olun.<\/p>","protected":false},"featured_media":468529,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477439","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Heap Spraying: A Detailed Analysis<\/mark>","faq_items":[{"question":"What is Heap Spraying?","answer":"<p>Heap Spraying is a technique used in computer exploitation. It involves flooding a region of a process's heap memory with shellcode to increase the likelihood of executing arbitrary code when vulnerabilities are exploited.<\/p>"},{"question":"Who first introduced Heap Spraying?","answer":"<p>Heap spraying was first introduced in a security paper written by Matt Conover and Oded Horovitz, published in the early 2000s.<\/p>"},{"question":"How does Heap Spraying work?","answer":"<p>Heap spraying functions through a two-step process: the Spray and the Trigger. During the spray, the heap memory is filled with multiple instances of the desired shellcode. The trigger is then used to exploit a vulnerability, executing arbitrary code. Since the memory has been filled with instances of the shellcode, the likelihood that the executed code will be the attacker's shellcode is significantly increased.<\/p>"},{"question":"What are some key features of Heap Spraying?","answer":"<p>Heap spraying is payload-agnostic, it increases the probability of successful code execution, and it bypasses certain security measures like address space layout randomization (ASLR) by not requiring knowledge of exact memory addresses.<\/p>"},{"question":"What are the types of Heap Spraying?","answer":"<p>Heap spraying can be divided into types based on the methods used to spray the heap, including Classic Heap Spraying, Sequential Heap Spraying, and NOP-sled Heap Spraying.<\/p>"},{"question":"What problems are associated with Heap Spraying and how can they be solved?","answer":"<p>As heap size increases, heap spraying becomes more detectable and mitigation techniques like ASLR and DEP make executing shellcode from the heap more difficult. To overcome these challenges, attackers may resort to more sophisticated methods of heap spraying, such as JIT spraying. On the defensive side, constant improvement and development of new mitigation techniques are necessary.<\/p>"},{"question":"How do Heap Spraying and Proxy Servers relate?","answer":"<p>While proxy servers themselves are not directly associated with heap spraying, they can play a role in both the perpetration and mitigation of attacks that use heap spraying. Proxy servers can be used by attackers to hide their location and by defenders to log traffic data for analysis, which can help in detecting potential exploits.<\/p>"},{"question":"What are some resources for further information about Heap Spraying?","answer":"<p>Resources include security papers such as \"Heap Spraying: A Technique to Counter Common Security Measures\" by Conover and Horovitz, OWASP, Mozilla Developer Network (MDN), and the Microsoft Security Response Center (MSRC).<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/wiki\/477439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/wiki\/477439\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/media\/468529"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/media?parent=477439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}