{"id":97,"date":"2026-01-28T03:02:20","date_gmt":"2026-01-27T18:02:20","guid":{"rendered":"http:\/\/word.igoni.kr\/?p=97"},"modified":"2026-02-02T22:40:14","modified_gmt":"2026-02-02T13:40:14","slug":"bash-%ec%9e%84%ec%9d%98%ec%bd%94%eb%93%9c-%ec%8b%a4%ed%96%89-%ec%b7%a8%ec%95%bd%ec%a0%90-%eb%b3%b4%ec%95%88%ec%97%85%eb%8d%b0%ec%9d%b4%ed%8a%b8","status":"publish","type":"post","link":"http:\/\/www.igoni.kr\/?p=97","title":{"rendered":"Bash \uc784\uc758\ucf54\ub4dc \uc2e4\ud589 \ucde8\uc57d\uc810 \ubcf4\uc548\uc5c5\ub370\uc774\ud2b8"},"content":{"rendered":"<p id=\"bkmrk-bash-%EB%B3%B4%EC%95%88%EC%97%85%EB%8D%B0%EC%9D%B4%ED%8A%B8%ED%95%98%EC%84%B8%EC%9A%94%7E%7E\">Bash \ubcf4\uc548\uc5c5\ub370\uc774\ud2b8\ud558\uc138\uc694~~<\/p>\n<ol id=\"bkmrk-%EC%B7%A8%EC%95%BD%EB%82%B4%EC%9A%A9-%3A-%EA%B3%B5%EA%B2%A9%EC%9E%90%EA%B0%80-bash%EB%A5%BC-%EC%82%AC%EC%9A%A9\">\n\n<li>\ucde8\uc57d\ub0b4\uc6a9 : \uacf5\uaca9\uc790\uac00 Bash\ub97c \uc0ac\uc6a9\ud558\uc5ec \uad6c\ud604\ub41c \uae30\ub2a5\uc744 \uc545\uc6a9\ud558\uc5ec \uc784\uc758\uc758 \ucf54\ub4dc\ub97c \uc2e4\ud589\uc2dc\ud0ac\uc218 \uc788\uc73c\ubbc0\ub85c \uc5c5\ub370\uc774\ud2b8 \uad8c\uace0<\/li>\n\n<li>\ub300\uc0c1 : GNU Bash\ub97c \uc0ac\uc6a9\ud558\ub294 \uc11c\ubc84 (<span style=\"text-decoration: line-through\">RHEL\uacc4\uc5f4 4\uc774\ud558 \ubc84\uc804\uc740 \uc9c0\uc6d0\uc774 \ub05d\ub0ac\uae30 \ub54c\ubb38\uc5d0 \uc5c5\ub370\uc774\ud2b8 \ubd88\uac00\ub2a5\ud569\ub2c8\ub2e4.<\/span>)<\/li>\n\n<li>RHEL4\uc774\ud558\ubc84\uc804\uc740 yum\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8 \ubd88\uac00\ud558\uace0, \ub300\uc2e0\uc5d0 \uc218\ub3d9\uc73c\ub85c \ud328\uce58\ub97c \uc9c4\ud589\ud574\uc57c \ud569\ub2c8\ub2e4.<\/li>\n\n<li>Bash\ub294 \ub9ac\ub205\uc2a4\uc5d0\uc11c \uae30\ubcf8\uc73c\ub85c \uc0ac\uc6a9\ud558\uace0 \uc788\ub294 \uc258\uc774\uae30 \ub54c\ubb38\uc5d0 \ub300\ubd80\ubd84 \uc5c5\ub370\uc774\ud2b8\ub97c \uc9c4\ud589\ud558\uc154\uc57c \ud560\uac83 \uac19\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ol>\n<p id=\"bkmrk-%ED%8C%A8%EC%B9%98%EC%9E%91%EC%97%85-%EC%A7%84%ED%96%89\">\ud328\uce58\uc791\uc5c5 \uc9c4\ud589<\/p>\n<ol id=\"bkmrk-%EC%B7%A8%EC%95%BD%EC%A0%90-%EB%8C%80%EC%83%81-%EC%8B%9C%EC%8A%A4%ED%85%9C-%EC%97%AC%EB%B6%80-%5Broot%40\">\n\n<li>\ucde8\uc57d\uc810 \ub300\uc0c1 \uc2dc\uc2a4\ud15c \uc5ec\ubd80\n<pre><code class=\"language-shell\">[root@localhost ~]# env x=&#039;() { :;}; echo vulnerable&#039; bash -c &quot;echo this is a test&quot;\nvulnerable\nthis is a test\n(vulnerable\uba54\uc2dc\uc9c0\uac00 \ucd9c\ub825\ub418\uba74 \uc5c5\ub370\uc774\ud2b8\uac00 \ud544\uc694\ud55c \ubc84\uc804\uc785\ub2c8\ub2e4.)<\/code><\/pre>\n<\/li>\n\n<li>\ubcf4\uc548\uc5c5\ub370\uc774\ud2b8 \ubc29\ubc95\n<pre><code class=\"language-shell\">[root@localhost ~]# yum update bash -y<\/code><\/pre>\n<\/li>\n\n<li>\uc870\uce58\uc644\ub8cc\uc5ec\ubd80 \ud655\uc778\n<pre><code class=\"language-shell\">[root@localhost ~]# env x=&#039;() { :;}; echo vulnerable&#039; bash -c &quot;echo this is a test&quot;\n&nbsp;this is a test<\/code><\/pre>\n<\/li>\n\n<li>bash\uc5c5\ub370\uc774\ud2b8 \uc774\ud6c4 \uc11c\ube44\uc2a4\uc758 \uc7ac\uc2dc\uc791\/\uc7ac\ubd80\ud305\uc740 \ud544\uc694\uc5c6\uc73c\ub098, \uc7ac\uc2dc\uc791\uc774 \ud544\uc694\ud55c \uc11c\ube44\uc2a4\ub97c \ud655\uc778\ud558\uace0 \uc2f6\uc73c\uba74 \uba85\ub839\uc5b4 \uc2e4\ud589\n<pre><code class=\"language-shell\">[root@localhost ~]# grep -l -z &#039;[^)]=() {&#039; \/proc\/[1-9]*\/environ | cut -d\/ -f3<\/code><\/pre>\n<\/li>\n<\/ol>\n<p id=\"bkmrk-reference\"><em>Reference<\/em><\/p>\n<ul id=\"bkmrk-https%3A%2F%2Frhn.redhat.c\">\n\n<li><span class=\"wikiexternallink\"><a class=\"wikimodel-freestanding\" href=\"https:\/\/rhn.redhat.com\/errata\/RHSA-2014-1293.html\"><span class=\"wikigeneratedlinkcontent\">https:\/\/rhn.redhat.com\/errata\/RHSA-2014-1293.html<\/span><\/a><\/span><\/li>\n\n<li><em><span class=\"wikiexternallink\"><a class=\"wikimodel-freestanding\" href=\"https:\/\/access.redhat.com\/articles\/1200223\/\/\/\/\"><span class=\"wikigeneratedlinkcontent\">https:\/\/access.redhat.com\/articles\/1200223\/\/\/\/<\/span><\/a><\/span><\/em><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<table style=\"border-collapse: collapse;width: 100%;height: 59.757px\" border=\"1\"><colgroup><col style=\"width: 99.881%\"><\/colgroup>\n<tbody>\n<tr style=\"height: 29.8785px\">\n<td style=\"height: 29.8785px\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-487\" src=\"http:\/\/word.igoni.kr\/wp-content\/uploads\/2026\/01\/5955bf34-d272-4c73-957f-9d8521a3bccf.png\" alt=\"\" width=\"1024\" height=\"1024\" srcset=\"http:\/\/www.igoni.kr\/wp-content\/uploads\/2026\/01\/5955bf34-d272-4c73-957f-9d8521a3bccf.png 1024w, http:\/\/www.igoni.kr\/wp-content\/uploads\/2026\/01\/5955bf34-d272-4c73-957f-9d8521a3bccf-300x300.png 300w, http:\/\/www.igoni.kr\/wp-content\/uploads\/2026\/01\/5955bf34-d272-4c73-957f-9d8521a3bccf-150x150.png 150w, http:\/\/www.igoni.kr\/wp-content\/uploads\/2026\/01\/5955bf34-d272-4c73-957f-9d8521a3bccf-768x768.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/td>\n<\/tr>\n<tr style=\"height: 29.8785px\">\n<td class=\"align-right\" style=\"height: 29.8785px;text-align: right\">perplexity\uc5d0\uc11c \uc0dd\uc131\ud55c AI\uc774\ubbf8\uc9c0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>Bash \ubcf4\uc548\uc5c5\ub370\uc774\ud2b8\ud558\uc138\uc694~~ \ucde8\uc57d\ub0b4\uc6a9 : \uacf5\uaca9\uc790\uac00 Bash\ub97c \uc0ac\uc6a9\ud558\uc5ec \uad6c\ud604\ub41c \uae30\ub2a5\uc744 \uc545\uc6a9\ud558\uc5ec \uc784\uc758\uc758 \ucf54\ub4dc\ub97c \uc2e4\ud589\uc2dc\ud0ac\uc218 \uc788\uc73c\ubbc0\ub85c \uc5c5\ub370\uc774\ud2b8 \uad8c\uace0&hellip;<\/p>","protected":false},"author":1,"featured_media":487,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[29,9],"class_list":["post-97","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux-","tag-bash","tag-centos"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Bash \ubcf4\uc548\uc5c5\ub370\uc774\ud2b8\ud558\uc138\uc694~~ \ucde8\uc57d\ub0b4\uc6a9 : \uacf5\uaca9\uc790\uac00 Bash\ub97c \uc0ac\uc6a9\ud558\uc5ec \uad6c\ud604\ub41c \uae30\ub2a5\uc744 \uc545\uc6a9\ud558\uc5ec \uc784\uc758\uc758 \ucf54\ub4dc\ub97c \uc2e4\ud589\uc2dc\ud0ac\uc218 \uc788\uc73c\ubbc0\ub85c \uc5c5\ub370\uc774\ud2b8 \uad8c\uace0 \ub300\uc0c1 : GNU Bash\ub97c \uc0ac\uc6a9\ud558\ub294 \uc11c\ubc84 (RHEL\uacc4\uc5f4 4\uc774\ud558 \ubc84\uc804\uc740 \uc9c0\uc6d0\uc774 \ub05d\ub0ac\uae30 \ub54c\ubb38\uc5d0 \uc5c5\ub370\uc774\ud2b8 \ubd88\uac00\ub2a5\ud569\ub2c8\ub2e4.) RHEL4\uc774\ud558\ubc84\uc804\uc740 yum\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8 \ubd88\uac00\ud558\uace0, \ub300\uc2e0\uc5d0 \uc218\ub3d9\uc73c\ub85c \ud328\uce58\ub97c \uc9c4\ud589\ud574\uc57c \ud569\ub2c8\ub2e4. Bash\ub294 \ub9ac\ub205\uc2a4\uc5d0\uc11c \uae30\ubcf8\uc73c\ub85c \uc0ac\uc6a9\ud558\uace0 \uc788\ub294 \uc258\uc774\uae30 \ub54c\ubb38\uc5d0 \ub300\ubd80\ubd84 \uc5c5\ub370\uc774\ud2b8\ub97c \uc9c4\ud589\ud558\uc154\uc57c \ud560\uac83 \uac19\uc2b5\ub2c8\ub2e4. \ud328\uce58\uc791\uc5c5 \uc9c4\ud589 \ucde8\uc57d\uc810 \ub300\uc0c1\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"artop0420\"\/>\n\t<link rel=\"canonical\" href=\"http:\/\/www.igoni.kr\/?p=97\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.0.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"ko_KR\" \/>\n\t\t<meta property=\"og:site_name\" content=\"\uc774\uace4\uc544\uc774 - \uc798\ub098\uac00\ub294 \uc804\uc0b0\uc7c1\uc774\uc758 \ube14\ub85c\uadf8\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Bash \uc784\uc758\ucf54\ub4dc \uc2e4\ud589 \ucde8\uc57d\uc810 \ubcf4\uc548\uc5c5\ub370\uc774\ud2b8 - \uc774\uace4\uc544\uc774\" \/>\n\t\t<meta property=\"og:description\" content=\"Bash \ubcf4\uc548\uc5c5\ub370\uc774\ud2b8\ud558\uc138\uc694~~ \ucde8\uc57d\ub0b4\uc6a9 : \uacf5\uaca9\uc790\uac00 Bash\ub97c \uc0ac\uc6a9\ud558\uc5ec \uad6c\ud604\ub41c \uae30\ub2a5\uc744 \uc545\uc6a9\ud558\uc5ec \uc784\uc758\uc758 \ucf54\ub4dc\ub97c \uc2e4\ud589\uc2dc\ud0ac\uc218 \uc788\uc73c\ubbc0\ub85c \uc5c5\ub370\uc774\ud2b8 \uad8c\uace0 \ub300\uc0c1 : GNU Bash\ub97c \uc0ac\uc6a9\ud558\ub294 \uc11c\ubc84 (RHEL\uacc4\uc5f4 4\uc774\ud558 \ubc84\uc804\uc740 \uc9c0\uc6d0\uc774 \ub05d\ub0ac\uae30 \ub54c\ubb38\uc5d0 \uc5c5\ub370\uc774\ud2b8 \ubd88\uac00\ub2a5\ud569\ub2c8\ub2e4.) RHEL4\uc774\ud558\ubc84\uc804\uc740 yum\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8 \ubd88\uac00\ud558\uace0, \ub300\uc2e0\uc5d0 \uc218\ub3d9\uc73c\ub85c \ud328\uce58\ub97c \uc9c4\ud589\ud574\uc57c \ud569\ub2c8\ub2e4. Bash\ub294 \ub9ac\ub205\uc2a4\uc5d0\uc11c \uae30\ubcf8\uc73c\ub85c \uc0ac\uc6a9\ud558\uace0 \uc788\ub294 \uc258\uc774\uae30 \ub54c\ubb38\uc5d0 \ub300\ubd80\ubd84 \uc5c5\ub370\uc774\ud2b8\ub97c \uc9c4\ud589\ud558\uc154\uc57c \ud560\uac83 \uac19\uc2b5\ub2c8\ub2e4. \ud328\uce58\uc791\uc5c5 \uc9c4\ud589 \ucde8\uc57d\uc810 \ub300\uc0c1\" \/>\n\t\t<meta property=\"og:url\" content=\"http:\/\/www.igoni.kr\/?p=97\" \/>\n\t\t<meta property=\"og:image\" content=\"http:\/\/word.igoni.kr\/wp-content\/uploads\/2026\/01\/cropped-j3fi6eistvc5ixa6lvm3ra-1.jpg\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-01-27T18:02:20+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-02-02T13:40:14+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Bash \uc784\uc758\ucf54\ub4dc \uc2e4\ud589 \ucde8\uc57d\uc810 \ubcf4\uc548\uc5c5\ub370\uc774\ud2b8 - \uc774\uace4\uc544\uc774\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Bash \ubcf4\uc548\uc5c5\ub370\uc774\ud2b8\ud558\uc138\uc694~~ \ucde8\uc57d\ub0b4\uc6a9 : \uacf5\uaca9\uc790\uac00 Bash\ub97c \uc0ac\uc6a9\ud558\uc5ec \uad6c\ud604\ub41c \uae30\ub2a5\uc744 \uc545\uc6a9\ud558\uc5ec \uc784\uc758\uc758 \ucf54\ub4dc\ub97c \uc2e4\ud589\uc2dc\ud0ac\uc218 \uc788\uc73c\ubbc0\ub85c \uc5c5\ub370\uc774\ud2b8 \uad8c\uace0 \ub300\uc0c1 : GNU Bash\ub97c \uc0ac\uc6a9\ud558\ub294 \uc11c\ubc84 (RHEL\uacc4\uc5f4 4\uc774\ud558 \ubc84\uc804\uc740 \uc9c0\uc6d0\uc774 \ub05d\ub0ac\uae30 \ub54c\ubb38\uc5d0 \uc5c5\ub370\uc774\ud2b8 \ubd88\uac00\ub2a5\ud569\ub2c8\ub2e4.) RHEL4\uc774\ud558\ubc84\uc804\uc740 yum\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8 \ubd88\uac00\ud558\uace0, \ub300\uc2e0\uc5d0 \uc218\ub3d9\uc73c\ub85c \ud328\uce58\ub97c \uc9c4\ud589\ud574\uc57c \ud569\ub2c8\ub2e4. Bash\ub294 \ub9ac\ub205\uc2a4\uc5d0\uc11c \uae30\ubcf8\uc73c\ub85c \uc0ac\uc6a9\ud558\uace0 \uc788\ub294 \uc258\uc774\uae30 \ub54c\ubb38\uc5d0 \ub300\ubd80\ubd84 \uc5c5\ub370\uc774\ud2b8\ub97c \uc9c4\ud589\ud558\uc154\uc57c \ud560\uac83 \uac19\uc2b5\ub2c8\ub2e4. \ud328\uce58\uc791\uc5c5 \uc9c4\ud589 \ucde8\uc57d\uc810 \ub300\uc0c1\" \/>\n\t\t<meta name=\"twitter:image\" content=\"http:\/\/word.igoni.kr\/wp-content\/uploads\/2026\/01\/cropped-j3fi6eistvc5ixa6lvm3ra-1.jpg\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"http:\\\/\\\/www.igoni.kr\\\/?p=97#blogposting\",\"name\":\"Bash \\uc784\\uc758\\ucf54\\ub4dc \\uc2e4\\ud589 \\ucde8\\uc57d\\uc810 \\ubcf4\\uc548\\uc5c5\\ub370\\uc774\\ud2b8 - \\uc774\\uace4\\uc544\\uc774\",\"headline\":\"Bash \\uc784\\uc758\\ucf54\\ub4dc \\uc2e4\\ud589 \\ucde8\\uc57d\\uc810 \\ubcf4\\uc548\\uc5c5\\ub370\\uc774\\ud2b8\",\"author\":{\"@id\":\"http:\\\/\\\/www.igoni.kr\\\/?author=1#author\"},\"publisher\":{\"@id\":\"http:\\\/\\\/www.igoni.kr\\\/#person\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"http:\\\/\\\/www.igoni.kr\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/5955bf34-d272-4c73-957f-9d8521a3bccf.png\",\"width\":1024,\"height\":1024},\"datePublished\":\"2026-01-28T03:02:20+09:00\",\"dateModified\":\"2026-02-02T22:40:14+09:00\",\"inLanguage\":\"ko-KR\",\"mainEntityOfPage\":{\"@id\":\"http:\\\/\\\/www.igoni.kr\\\/?p=97#webpage\"},\"isPartOf\":{\"@id\":\"http:\\\/\\\/www.igoni.kr\\\/?p=97#webpage\"},\"articleSection\":\"Linux \\uacf5\\ud1b5, bash, centos\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"http:\\\/\\\/www.igoni.kr\\\/?p=97#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"http:\\\/\\\/www.igoni.kr#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"http:\\\/\\\/www.igoni.kr\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"http:\\\/\\\/www.igoni.kr\\\/?cat=5#listItem\",\"name\":\"1. 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