{"id":8446,"date":"2025-01-02T22:45:11","date_gmt":"2025-01-02T19:45:11","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/pythonda-yaml-kullanirken-dikkatli-olun-guvenlik-aciklari\/"},"modified":"2025-01-02T22:45:11","modified_gmt":"2025-01-02T19:45:11","slug":"pythonda-yaml-kullanirken-dikkatli-olun-guvenlik-aciklari","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/pythonda-yaml-kullanirken-dikkatli-olun-guvenlik-aciklari\/","title":{"rendered":"Python&#8217;da YAML Kullan\u0131rken Dikkatli Olun: G\u00fcvenlik A\u00e7\u0131klar\u0131!"},"content":{"rendered":"<p><body><\/p>\n<p>Python&#8217;da YAML Kullan\u0131rken Dikkatli Olun: G\u00fcvenlik A\u00e7\u0131klar\u0131!<\/p>\n<p>Python geli\u015ftiricileri aras\u0131nda pop\u00fcler bir veri seri hale getirme dili olan YAML, okunabilirli\u011fi ve kullan\u0131\u015fl\u0131l\u0131\u011f\u0131 nedeniyle s\u0131kl\u0131kla tercih edilir.  Ancak, YAML&#8217;in yanl\u0131\u015f kullan\u0131m\u0131 ciddi g\u00fcvenlik a\u00e7\u0131klar\u0131na yol a\u00e7abilir.  Bu makalede, Python&#8217;da YAML kullan\u0131rken kar\u015f\u0131la\u015fabilece\u011finiz g\u00fcvenlik risklerini ve bu riskleri nas\u0131l \u00f6nleyebilece\u011finizi ayr\u0131nt\u0131l\u0131 olarak ele alaca\u011f\u0131z.<\/p>\n<h2>YAML&#8217;in G\u00fcvenlik Riskleri<\/h2>\n<p>YAML&#8217;in en b\u00fcy\u00fck g\u00fcvenlik riski,  <b>arbitrary code execution<\/b> (keyfi kod y\u00fcr\u00fctme)  a\u00e7\u0131\u011f\u0131d\u0131r.  YAML dosyas\u0131nda \u00f6zel olarak haz\u0131rlanm\u0131\u015f veriler bulunmas\u0131 durumunda, PyYAML gibi YAML ayr\u0131\u015ft\u0131r\u0131c\u0131lar bu verileri kod olarak yorumlayabilir ve zararl\u0131 komutlar\u0131n \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131na neden olabilir.  \u00d6rne\u011fin,  <code>!!python\/object\/apply:os.system<\/code> gibi bir girdi,  <code>os.system()<\/code> fonksiyonunu kullanarak sistem komutlar\u0131n\u0131n y\u00fcr\u00fct\u00fclmesine olanak tan\u0131r. Bu durum,  sisteminizin ele ge\u00e7irilmesine veya hassas verilerin \u00e7al\u0131nmas\u0131na yol a\u00e7abilir. <\/p>\n<p>Bunun yan\u0131 s\u0131ra, YAML dosyalar\u0131n\u0131n g\u00fcvenilir olmayan kaynaklardan y\u00fcklenmesi de risk olu\u015fturur.  G\u00fcvenilir olmayan bir kaynaktan gelen bir YAML dosyas\u0131,  zararl\u0131 kod i\u00e7erebilir ve sisteminizi tehlikeye atabilir.  Dolay\u0131s\u0131yla,  YAML dosyalar\u0131n\u0131n kayna\u011f\u0131na dikkat etmek b\u00fcy\u00fck \u00f6nem ta\u015f\u0131r.<\/p>\n<h2>G\u00fcvenli YAML Kullan\u0131m\u0131 \u0130\u00e7in \u0130pu\u00e7lar\u0131<\/h2>\n<p>YAML&#8217;i g\u00fcvenli bir \u015fekilde kullanmak i\u00e7in a\u015fa\u011f\u0131daki \u00f6nlemleri alabilirsiniz:<\/p>\n<ol>\n<li><b>G\u00fcvenilir Kaynaklardan YAML Dosyalar\u0131 Y\u00fckleyin:<\/b>  Yaln\u0131zca g\u00fcvendi\u011finiz kaynaklardan YAML dosyalar\u0131 y\u00fckleyin.  \u0130nternet \u00fczerinden indirilen veya bilinmeyen kaynaklardan gelen YAML dosyalar\u0131n\u0131 dikkatlice inceleyin.<\/li>\n<li><b>safe_load() Fonksiyonunu Kullan\u0131n:<\/b>  PyYAML k\u00fct\u00fcphanesinde bulunan safe_load() fonksiyonu,  keyfi kod y\u00fcr\u00fctme a\u00e7\u0131\u011f\u0131n\u0131 \u00f6nlemek i\u00e7in tasarlanm\u0131\u015ft\u0131r.  Bu fonksiyon,  YAML verilerini g\u00fcvenli bir \u015fekilde ayr\u0131\u015ft\u0131r\u0131r ve zararl\u0131 kodlar\u0131n \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131n\u0131 engeller. <\/li>\n<li><b>Giri\u015fleri Do\u011frulay\u0131n:<\/b>  YAML dosyas\u0131ndan okunan verileri,  kullan\u0131lmadan \u00f6nce dikkatlice do\u011frulay\u0131n.  Beklenmedik veya zararl\u0131 verileri tespit etmek i\u00e7in giri\u015f do\u011frulama mekanizmalar\u0131 kullan\u0131n.<\/li>\n<li><b>YAML \u015eemas\u0131n\u0131 Kullan\u0131n:<\/b>  YAML \u015femalar\u0131,  YAML dosyalar\u0131n\u0131n yap\u0131s\u0131n\u0131 ve i\u00e7eri\u011fini tan\u0131mlamak i\u00e7in kullan\u0131l\u0131r.  \u015eema do\u011frulamas\u0131,  beklenmedik veya zararl\u0131 verilerin dosyaya eklenmesini \u00f6nler. <\/li>\n<li><b>En Son S\u00fcr\u00fcmleri Kullan\u0131n:<\/b>  PyYAML ve di\u011fer ilgili k\u00fct\u00fcphanelerin en son s\u00fcr\u00fcmlerini kullanarak g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 en aza indirebilirsiniz.  S\u00fcr\u00fcm g\u00fcncellemeleri genellikle g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 giderir.<\/li>\n<\/ol>\n<h2>\u00d6rnek Kod<\/h2>\n<p><code>safe_load()<\/code> fonksiyonunun nas\u0131l kullan\u0131laca\u011f\u0131na dair bir \u00f6rnek:<\/p>\n<pre><code class=\"language-python\">\nimport yaml\n\nyaml_data = \"\"\"\nname: Fatih Soysal\nage: 30\n\"\"\"\n\ndata = yaml.safe_load(yaml_data)\nprint(data['name']) # G\u00fcvenli \u015fekilde veri eri\u015fimi\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>yaml.safe_load()<\/code> fonksiyonu kullanarak YAML verileri g\u00fcvenli bir \u015fekilde ayr\u0131\u015ft\u0131r\u0131l\u0131r.  Bu sayede,  keyfi kod y\u00fcr\u00fctme a\u00e7\u0131\u011f\u0131 \u00f6nlenir.<\/p>\n<p><b>\u00d6nemli Not:<\/b>  <code>yaml.load()<\/code> fonksiyonunu kullanmaktan ka\u00e7\u0131n\u0131n.  Bu fonksiyon g\u00fcvenlik a\u00e7\u0131\u011f\u0131na kar\u015f\u0131 savunmas\u0131zd\u0131r.<\/p>\n<p>Umar\u0131m bu makale, Python&#8217;da YAML kullan\u0131m\u0131yla ilgili g\u00fcvenlik risklerini anlamak ve bu riskleri azaltmak i\u00e7in yard\u0131mc\u0131 olmu\u015ftur. Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.  Ayr\u0131ca, PyYAML k\u00fct\u00fcphanesinin resmi d\u00f6k\u00fcmanlar\u0131n\u0131 inceleyebilirsiniz. <a href=\"https:\/\/pyyaml.org\/wiki\/PyYAMLDocumentation\">PyYAML Documentation<\/a><\/p>\n<p>#Etiketler: Python, YAML, g\u00fcvenlik, g\u00fcvenlik a\u00e7\u0131\u011f\u0131, g\u00fcvenli kodlama, PyYAML, YAML g\u00fcvenli\u011fi, Python g\u00fcvenlik, programlama g\u00fcvenli\u011fi, safe_load, arbitrary code execution<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Python&#8217;da YAML Kullan\u0131rken Dikkatli Olun: G\u00fcvenlik A\u00e7\u0131klar\u0131! Python geli\u015ftiricileri aras\u0131nda pop\u00fcler bir veri seri hale getirme dili olan&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-8446","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python&#039;da YAML Kullan\u0131rken Dikkatli Olun: G\u00fcvenlik A\u00e7\u0131klar\u0131!<\/title>\n<meta name=\"description\" content=\"Python geli\u015ftiricileri aras\u0131nda pop\u00fcler bir veri seri hale getirme dili olan YAML, okunabilirli\u011fi ve kullan\u0131\u015fl\u0131l\u0131\u011f\u0131 nedeniyle s\u0131kl\u0131kla tercih edilir. Ancak, YAML&#039;in yanl\u0131\u015f kullan\u0131m\u0131 ciddi g\u00fcvenlik a\u00e7\u0131klar\u0131na yol a\u00e7abilir. Bu makalede, Python&#039;da YAML kullan\u0131rken kar\u015f\u0131la\u015fabilece\u011finiz g\u00fcvenlik risklerini ve bu riskleri nas\u0131l \u00f6nleyebilece\u011finizi ayr\u0131nt\u0131l\u0131 olarak ele alaca\u011f\u0131z.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/pythonda-yaml-kullanirken-dikkatli-olun-guvenlik-aciklari\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python&#039;da YAML Kullan\u0131rken Dikkatli Olun: G\u00fcvenlik A\u00e7\u0131klar\u0131!\" \/>\n<meta property=\"og:description\" content=\"Python geli\u015ftiricileri aras\u0131nda pop\u00fcler bir veri seri hale getirme dili olan YAML, okunabilirli\u011fi ve kullan\u0131\u015fl\u0131l\u0131\u011f\u0131 nedeniyle s\u0131kl\u0131kla tercih edilir. 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