{"id":16887,"date":"2025-04-01T17:30:15","date_gmt":"2025-04-01T14:30:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/"},"modified":"2025-04-01T17:30:15","modified_gmt":"2025-04-01T14:30:15","slug":"sql-enjeksiyonu-pratik-bir-saldiri-rehberi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/","title":{"rendered":"SQL Enjeksiyonu: Pratik Bir Sald\u0131r\u0131 Rehberi"},"content":{"rendered":"<p><body><\/p>\n<p>SQL Enjeksiyonu: Pratik Bir Sald\u0131r\u0131 Rehberi<\/p>\n<p>Merhaba! Ben Fatih Soysal ve bu yaz\u0131da, SQL enjeksiyonu (SQLi) g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 nas\u0131l tespit edece\u011finizi ve istismar edece\u011finizi ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m.  Bu yayg\u0131n g\u00fcvenlik a\u00e7\u0131\u011f\u0131, k\u00f6t\u00fc niyetli ki\u015filerin veritaban\u0131n\u0131za eri\u015fmesine ve verilerinizi manip\u00fcle etmesine olanak tan\u0131r.  \u00d6ncelikle, SQLi&#8217;nin ne oldu\u011funu ve nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlamak \u00e7ok \u00f6nemlidir.  Sonras\u0131nda, pratik \u00f6rneklerle, farkl\u0131 SQLi tekniklerini ve bunlara kar\u015f\u0131 al\u0131nabilecek \u00f6nlemleri inceleyece\u011fiz. <\/p>\n<h2>SQL Enjeksiyonu Nedir?<\/h2>\n<p>SQL enjeksiyonu, veritaban\u0131 sorgular\u0131na k\u00f6t\u00fc ama\u00e7l\u0131 SQL komutlar\u0131 ekleyerek veritaban\u0131 sistemlerinin ele ge\u00e7irilmesi y\u00f6ntemidir.  \u00d6rne\u011fin, bir web sitesinin giri\u015f formuna \u00f6zel olarak haz\u0131rlanm\u0131\u015f bir sorgu g\u00f6ndererek, veritaban\u0131ndaki kullan\u0131c\u0131 adlar\u0131n\u0131 ve \u015fifreleri elde edebilirsiniz.  Bu, g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131n varl\u0131\u011f\u0131n\u0131 g\u00f6steren bir g\u00f6stergedir.  Bu a\u00e7\u0131\u011f\u0131 kapatmak, sistem g\u00fcvenli\u011fini sa\u011flamak i\u00e7in son derece \u00f6nemlidir.  Dolay\u0131s\u0131yla,  \u00f6zellikle web uygulamalar\u0131nda, SQL enjeksiyonundan korunmak i\u00e7in g\u00fcvenlik \u00f6nlemlerinin al\u0131nmas\u0131 \u015fartt\u0131r.<\/p>\n<h2>SQL Enjeksiyonu T\u00fcrleri<\/h2>\n<p>Birka\u00e7 farkl\u0131 SQL enjeksiyonu t\u00fcr\u00fc vard\u0131r.  En yayg\u0131n olanlar\u0131 \u015funlard\u0131r:<\/p>\n<ul>\n<li><b>Temel SQL Enjeksiyonu (In-band):<\/b>  Bu t\u00fcrde, sald\u0131rgan do\u011frudan veritaban\u0131ndan veri elde eder.  Sald\u0131r\u0131, genellikle yanl\u0131\u015f parametre do\u011frulama veya yetersiz giri\u015f do\u011frulama kontrollerinden kaynaklan\u0131r.<\/li>\n<li><b>Blind SQL Enjeksiyonu:<\/b> Bu t\u00fcrde, sald\u0131rgan veritaban\u0131ndan do\u011frudan veri alamaz.  Ancak, uygulaman\u0131n yan\u0131tlar\u0131n\u0131 analiz ederek veritaban\u0131 hakk\u0131nda bilgi toplayabilir.  Bu ikiye ayr\u0131l\u0131r:  Boolean tabanl\u0131 (do\u011fru\/yanl\u0131\u015f) ve zaman tabanl\u0131 (s\u00fcre \u00f6l\u00e7\u00fcm\u00fc).<\/li>\n<li><b>Out-of-band SQL Enjeksiyonu:<\/b> Bu y\u00f6ntem, sald\u0131rgan\u0131n veritaban\u0131ndan veriyi do\u011frudan elde etmek yerine,  harici bir sunucuya veya hizmete veri s\u0131zd\u0131rmas\u0131n\u0131 i\u00e7erir.<\/li>\n<\/ul>\n<h2>Pratik \u00d6rnekler<\/h2>\n<p>\u015eimdi, baz\u0131 pratik \u00f6rneklerle SQL enjeksiyonunun nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 daha detayl\u0131 inceleyelim.  A\u015fa\u011f\u0131daki \u00f6rnekler, e\u011fitim ama\u00e7l\u0131d\u0131r ve illegal faaliyetlerde kullan\u0131lmamal\u0131d\u0131r.<\/p>\n<p><b>\u00d6rnek 1: Temel SQL Enjeksiyonu<\/b><\/p>\n<pre><code class=\"language-sql\">\n-- K\u00f6t\u00fc ama\u00e7l\u0131 giri\u015f:  ' OR '1'='1\n<\/code><\/pre>\n<p>Bu \u00f6rnekte,  &#8216; OR &#8216;1&#8217;=&#8217;1&#8242; eklenmesi, veritaban\u0131n\u0131n her zaman do\u011fru sonucu d\u00f6nd\u00fcrmesine neden olur ve t\u00fcm verileri g\u00f6sterir. Bu,  giri\u015f do\u011frulamas\u0131n\u0131n eksik oldu\u011funu g\u00f6sterir.<\/p>\n<p><b>\u00d6rnek 2:  Blind SQL Enjeksiyonu (Boolean tabanl\u0131)<\/b><\/p>\n<p>Bu \u00f6rnekte,  sorgular\u0131n yan\u0131tlar\u0131n\u0131 analiz ederek, veritaban\u0131 \u015femas\u0131n\u0131 \u00f6\u011frenebiliriz.  \u00d6rne\u011fin,  kullan\u0131c\u0131 ad\u0131 &#8216;admin&#8217; olup olmad\u0131\u011f\u0131n\u0131 kontrol etmek i\u00e7in a\u015fa\u011f\u0131daki gibi sorgular kullanabiliriz.<\/p>\n<pre><code class=\"language-sql\">\n-- ' AND IF(SUBSTRING(database(),1,1)='a', SLEEP(5), 0) --\n<\/code><\/pre>\n<p>Bu sorgu, veritaban\u0131 ad\u0131 &#8216;a&#8217; ile ba\u015fl\u0131yorsa 5 saniye bekletir. Yan\u0131t s\u00fcresini \u00f6l\u00e7erek, veritaban\u0131 ad\u0131n\u0131n &#8216;a&#8217; ile ba\u015flay\u0131p ba\u015flamad\u0131\u011f\u0131n\u0131 anlayabiliriz.<\/p>\n<h2>Savunma Stratejileri<\/h2>\n<p>SQL enjeksiyonundan korunmak i\u00e7in a\u015fa\u011f\u0131daki \u00f6nlemleri almal\u0131s\u0131n\u0131z:<\/p>\n<ul>\n<li><b>Parametreli Sorgular Kullan\u0131n:<\/b>  Bu, kullan\u0131c\u0131 giri\u015flerini do\u011frudan SQL sorgular\u0131na eklemek yerine,  parametreler olarak g\u00f6ndermenizi sa\u011flar.<\/li>\n<li><b>Giri\u015f Do\u011frulamas\u0131n\u0131 Uygulay\u0131n:<\/b>  Kullan\u0131c\u0131 giri\u015flerini her zaman do\u011frulay\u0131n ve beklenmedik karakterleri filtreleyin.<\/li>\n<li><b>En Az Ayr\u0131cal\u0131k Prensibini Uygulan:<\/b> Veritaban\u0131 kullan\u0131c\u0131lar\u0131na sadece ihtiya\u00e7 duyduklar\u0131 kadar yetki verin.<\/li>\n<li><b>G\u00fcncel Kal\u0131n:<\/b>  Veritaban\u0131 sisteminizi ve yaz\u0131l\u0131mlar\u0131n\u0131z\u0131 d\u00fczenli olarak g\u00fcncelleyin.<\/li>\n<li><b>G\u00fcvenlik Duvarlar\u0131 Kullan\u0131n:<\/b>  G\u00fcvenlik duvarlar\u0131,  \u015f\u00fcpheli trafi\u011fi engellemeye yard\u0131mc\u0131 olur.<\/li>\n<\/ul>\n<h2>Sonu\u00e7<\/h2>\n<p>SQL enjeksiyonu, ciddi bir g\u00fcvenlik a\u00e7\u0131\u011f\u0131d\u0131r ve  verilerinizi korumak i\u00e7in dikkatli olmal\u0131s\u0131n\u0131z. Bu makalede ele ald\u0131\u011f\u0131m\u0131z \u00f6nlemleri alarak, sistemlerinizin g\u00fcvenli\u011fini \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilirsiniz.  Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> sitesini ziyaret edebilirsiniz.  Ayr\u0131ca konu hakk\u0131nda daha detayl\u0131 bilgi edinmek i\u00e7in <a href=\"https:\/\/owasp.org\/www-project-top-ten\/\">OWASP Top 10<\/a> belgesine g\u00f6z atabilirsiniz.<\/p>\n<p>#Etiketler: SQL enjeksiyonu, SQL injection, g\u00fcvenlik a\u00e7\u0131\u011f\u0131, siber g\u00fcvenlik, hacking, sald\u0131r\u0131, savunma, veritaban\u0131, SQL, exploit, cheat sheet, parametreli sorgular, giri\u015f do\u011frulama<br \/>\n<\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"SQL Enjeksiyonu: Pratik Bir Sald\u0131r\u0131 Rehberi Merhaba! Ben Fatih Soysal ve bu yaz\u0131da, SQL enjeksiyonu (SQLi) g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131&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-16887","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>SQL Enjeksiyonu: Pratik Bir Sald\u0131r\u0131 Rehberi<\/title>\n<meta name=\"description\" content=\"Merhaba! Ben Fatih Soysal ve bu yaz\u0131da, SQL enjeksiyonu (SQLi) g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 nas\u0131l tespit edece\u011finizi ve istismar edece\u011finizi ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. Bu yayg\u0131n g\u00fcvenlik a\u00e7\u0131\u011f\u0131, k\u00f6t\u00fc niyetli ki\u015filerin veritaban\u0131n\u0131za eri\u015fmesine ve verilerinizi manip\u00fcle etmesine olanak tan\u0131r. \u00d6ncelikle, SQLi&#039;nin ne oldu\u011funu ve nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlamak \u00e7ok \u00f6nemlidir. Sonras\u0131nda, pratik \u00f6rneklerle, farkl\u0131 SQLi tekniklerini ve bunlara kar\u015f\u0131 al\u0131nabilecek \u00f6nlemleri inceleyece\u011fiz.\" \/>\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\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SQL Enjeksiyonu: Pratik Bir Sald\u0131r\u0131 Rehberi\" \/>\n<meta property=\"og:description\" content=\"Merhaba! Ben Fatih Soysal ve bu yaz\u0131da, SQL enjeksiyonu (SQLi) g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 nas\u0131l tespit edece\u011finizi ve istismar edece\u011finizi ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. Bu yayg\u0131n g\u00fcvenlik a\u00e7\u0131\u011f\u0131, k\u00f6t\u00fc niyetli ki\u015filerin veritaban\u0131n\u0131za eri\u015fmesine ve verilerinizi manip\u00fcle etmesine olanak tan\u0131r. \u00d6ncelikle, SQLi&#039;nin ne oldu\u011funu ve nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlamak \u00e7ok \u00f6nemlidir. Sonras\u0131nda, pratik \u00f6rneklerle, farkl\u0131 SQLi tekniklerini ve bunlara kar\u015f\u0131 al\u0131nabilecek \u00f6nlemleri inceleyece\u011fiz.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-01T14:30:15+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"SQL Enjeksiyonu: Pratik Bir Sald\u0131r\u0131 Rehberi\",\"datePublished\":\"2025-04-01T14:30:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/\"},\"wordCount\":654,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/\",\"name\":\"SQL Enjeksiyonu: Pratik Bir Sald\u0131r\u0131 Rehberi\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-04-01T14:30:15+00:00\",\"description\":\"Merhaba! Ben Fatih Soysal ve bu yaz\u0131da, SQL enjeksiyonu (SQLi) g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 nas\u0131l tespit edece\u011finizi ve istismar edece\u011finizi ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. Bu yayg\u0131n g\u00fcvenlik a\u00e7\u0131\u011f\u0131, k\u00f6t\u00fc niyetli ki\u015filerin veritaban\u0131n\u0131za eri\u015fmesine ve verilerinizi manip\u00fcle etmesine olanak tan\u0131r. \u00d6ncelikle, SQLi'nin ne oldu\u011funu ve nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlamak \u00e7ok \u00f6nemlidir. 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Ben Fatih Soysal ve bu yaz\u0131da, SQL enjeksiyonu (SQLi) g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 nas\u0131l tespit edece\u011finizi ve istismar edece\u011finizi ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. Bu yayg\u0131n g\u00fcvenlik a\u00e7\u0131\u011f\u0131, k\u00f6t\u00fc niyetli ki\u015filerin veritaban\u0131n\u0131za eri\u015fmesine ve verilerinizi manip\u00fcle etmesine olanak tan\u0131r. \u00d6ncelikle, SQLi'nin ne oldu\u011funu ve nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlamak \u00e7ok \u00f6nemlidir. Sonras\u0131nda, pratik \u00f6rneklerle, farkl\u0131 SQLi tekniklerini ve bunlara kar\u015f\u0131 al\u0131nabilecek \u00f6nlemleri inceleyece\u011fiz.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/fatihsoysal.com\/blog\/sql-enjeksiyonu-pratik-bir-saldiri-rehberi\/","og_locale":"tr_TR","og_type":"article","og_title":"SQL Enjeksiyonu: Pratik Bir Sald\u0131r\u0131 Rehberi","og_description":"Merhaba! Ben Fatih Soysal ve bu yaz\u0131da, SQL enjeksiyonu (SQLi) g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 nas\u0131l tespit edece\u011finizi ve istismar edece\u011finizi ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131m. 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