{"id":1104,"date":"2014-09-26T15:28:03","date_gmt":"2014-09-26T13:28:03","guid":{"rendered":"http:\/\/teknikblog.niobehosting.com\/?p=1104"},"modified":"2014-09-26T15:43:05","modified_gmt":"2014-09-26T13:43:05","slug":"shellshock-guvenlik-acigi-hakkinda","status":"publish","type":"post","link":"https:\/\/www.niobehosting.com\/bilgi-bankasi\/shellshock-guvenlik-acigi-hakkinda\/","title":{"rendered":"Shellshock G\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda"},"content":{"rendered":"

De\u011ferli m\u00fc\u015fterimiz,<\/p>\n

Linux tabanl\u0131 sunucularda “Shellshock” isminde bir g\u00fcvenlik a\u00e7\u0131\u011f\u0131 tespit edilmi\u015ftir.<\/p>\n

G\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda detayl\u0131 bilgi almak i\u00e7in CVE-2014-6271<\/a><\/p>\n

Tespit<\/strong><\/p>\n

Sunucunuzda bu g\u00fcvenlik a\u00e7\u0131\u011f\u0131n\u0131n olup olmad\u0131\u011f\u0131n\u0131 test etmek i\u00e7in;<\/p>\n

– Sunucunuza SSH ba\u011flant\u0131s\u0131 yap\u0131n ve a\u015fa\u011f\u0131daki komutu \u00e7al\u0131\u015ft\u0131r\u0131n;<\/p>\n

env x='() { :;}; echo GuvenliDegil’ bash -c “echo Sunucunuz”<\/strong><\/p>\n

E\u011fer sunucunuzda g\u00fcvenlik a\u00e7\u0131\u011f\u0131 varsa komutun \u00e7\u0131kt\u0131s\u0131;<\/p>\n

GuvenliDegil
\nSunucunuz<\/p>\n

\u015feklinde olacakt\u0131r.<\/p>\n

Sunucunuzda g\u00fcvenlik a\u00e7\u0131\u011f\u0131 yoksa, komutun \u00e7\u0131kt\u0131s\u0131 a\u015fa\u011f\u0131daki gibi olacakt\u0131r;<\/strong><\/p>\n

bash: warning: x: ignoring function definition attempt
\nbash: error importing function definition for `x’
\nSunucunuz<\/p>\n

\u00c7\u00f6z\u00fcm<\/strong><\/p>\n

G\u00fcncellemeyi uygulad\u0131ktan sonra, yukar\u0131daki tespit y\u00f6ntemi ile tekrar test etmelisiniz.<\/strong><\/p>\n

a) Centos i\u015fletim sistemi i\u00e7in;<\/strong><\/p>\n

yum update bash<\/strong> komutu ile g\u00fcncelleme yapabilirsiniz, yada;<\/p>\n

– cat \/etc\/redhat-release komutu ile i\u015fletim sistemi versiyonunuza bak\u0131n<\/p>\n

– uname -a komutu ile i\u015fletim sisteminin 32 \/ 64 bit kontrol\u00fcn\u00fc yap\u0131n ve ald\u0131\u011f\u0131n\u0131z bilgilere g\u00f6re, a\u015fa\u011f\u0131da sizin i\u00e7in uygun olan paketi y\u00fckleyin;<\/p>\n

Centos 6 64bit<\/em><\/p>\n

rpm -Uvh http:\/\/mirror.centos.org\/centos-6\/6\/updates\/x86_64\/Packages\/bash-4.1.2-15.el6_5.1.x86_64.rpm<\/p>\n

Centos 5 64bit<\/em><\/p>\n

rpm -Uvh http:\/\/mirror.centos.org\/centos-5\/5.10\/updates\/x86_64\/RPMS\/bash-3.2-33.el5.1.x86_64.rpm<\/p>\n

Centos 5 32bit<\/em><\/p>\n

rpm -Uvh http:\/\/mirror.centos.org\/centos-5\/5.10\/updates\/i386\/RPMS\/bash-3.2-33.el5.1.i386.rpm<\/p>\n

b) Cloud Linux Kernel i\u015fletim sistemi i\u00e7in;<\/strong><\/p>\n

yum clean all
\nyum update bash<\/p>\n

c) Debian i\u015fletim sistemi i\u00e7in;<\/strong><\/p>\n

apt-get update
\napt-get install –only-upgrade bash<\/p>\n

d) Ubuntu i\u015fletim sistemi i\u00e7in;<\/strong><\/p>\n

sudo apt-get update && sudo apt-get install bash<\/p>\n","protected":false},"excerpt":{"rendered":"

De\u011ferli m\u00fc\u015fterimiz, Linux tabanl\u0131 sunucularda “Shellshock” isminde bir g\u00fcvenlik a\u00e7\u0131\u011f\u0131 tespit edilmi\u015ftir. G\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda detayl\u0131 bilgi almak i\u00e7in CVE-2014-6271 Tespit Sunucunuzda bu g\u00fcvenlik a\u00e7\u0131\u011f\u0131n\u0131n olup olmad\u0131\u011f\u0131n\u0131 test etmek i\u00e7in; – Sunucunuza SSH ba\u011flant\u0131s\u0131 yap\u0131n ve a\u015fa\u011f\u0131daki komutu \u00e7al\u0131\u015ft\u0131r\u0131n; env x='() { :;}; echo GuvenliDegil’ bash -c “echo Sunucunuz” E\u011fer sunucunuzda g\u00fcvenlik a\u00e7\u0131\u011f\u0131 varsa komutun […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-1104","post","type-post","status-publish","format-standard","hentry","category-linux"],"yoast_head":"\nShellshock G\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda - Niobe Hosting<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.niobehosting.com\/bilgi-bankasi\/shellshock-guvenlik-acigi-hakkinda\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Shellshock G\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda - Niobe Hosting\" \/>\n<meta property=\"og:description\" content=\"De\u011ferli m\u00fc\u015fterimiz, Linux tabanl\u0131 sunucularda “Shellshock” isminde bir g\u00fcvenlik a\u00e7\u0131\u011f\u0131 tespit edilmi\u015ftir. G\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda detayl\u0131 bilgi almak i\u00e7in CVE-2014-6271 Tespit Sunucunuzda bu g\u00fcvenlik a\u00e7\u0131\u011f\u0131n\u0131n olup olmad\u0131\u011f\u0131n\u0131 test etmek i\u00e7in; – Sunucunuza SSH ba\u011flant\u0131s\u0131 yap\u0131n ve a\u015fa\u011f\u0131daki komutu \u00e7al\u0131\u015ft\u0131r\u0131n; env x='() { :;}; echo GuvenliDegil’ bash -c “echo Sunucunuz” E\u011fer sunucunuzda g\u00fcvenlik a\u00e7\u0131\u011f\u0131 varsa komutun […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.niobehosting.com\/bilgi-bankasi\/shellshock-guvenlik-acigi-hakkinda\/\" \/>\n<meta property=\"og:site_name\" content=\"Bilgi Bankas\u0131\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/niobehosting\" \/>\n<meta property=\"article:published_time\" content=\"2014-09-26T13:28:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-09-26T13:43:05+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@niobehosting\" \/>\n<meta name=\"twitter:site\" content=\"@niobehosting\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.niobehosting.com\\\/bilgi-bankasi\\\/shellshock-guvenlik-acigi-hakkinda\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.niobehosting.com\\\/bilgi-bankasi\\\/shellshock-guvenlik-acigi-hakkinda\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/www.niobehosting.com\\\/bilgi-bankasi\\\/#\\\/schema\\\/person\\\/7ab00ebb1cd1809cf63cd845b59f4f0f\"},\"headline\":\"Shellshock G\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda\",\"datePublished\":\"2014-09-26T13:28:03+00:00\",\"dateModified\":\"2014-09-26T13:43:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.niobehosting.com\\\/bilgi-bankasi\\\/shellshock-guvenlik-acigi-hakkinda\\\/\"},\"wordCount\":289,\"articleSection\":[\"Linux\"],\"inLanguage\":\"tr\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.niobehosting.com\\\/bilgi-bankasi\\\/shellshock-guvenlik-acigi-hakkinda\\\/\",\"url\":\"https:\\\/\\\/www.niobehosting.com\\\/bilgi-bankasi\\\/shellshock-guvenlik-acigi-hakkinda\\\/\",\"name\":\"Shellshock G\u00fcvenlik a\u00e7\u0131\u011f\u0131 hakk\u0131nda - 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