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Defeating the Frame Busting Buster

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How Can I Defeat a Frame-Busting Buster That Bypasses Traditional Frame-Busting JavaScript?

Barbara Streisand

Dec 24, 2024 pm 04:34 PM

How Can I Defeat a Frame-Busting Buster That Bypasses Traditional Frame-Busting JavaScript?

Defeating the Frame Busting Buster

Consider the scenario where you wish to prevent other websites from embedding your site within an . To do this, you incorporate the following frame-busting JavaScript into your pages:</p> <pre class="brush:php;toolbar:false">/* break us out of any containing iframes */ if (top != self) { top.location.replace(self.location.href); }</pre> <p>While effective, this code can be bypassed by a frame-busting buster:</p> <pre class="brush:php;toolbar:false"><script type="text/javascript"> var prevent_bust = 0 window.onbeforeunload = function() { prevent_bust++ } setInterval(function() { if (prevent_bust > 0) { prevent_bust -= 2 window.top.location = 'http://example.org/page-which-responds-with-204' } }, 1) </script></pre> <p>This buster operates by:</p> <ul> <li>Incrementing a counter on any attempted navigation away from the page</li> <li>Using a timer to redirect the page to the attacker's server if the counter increases</li> <li>Retrieving a 204 HTTP status code, preventing further navigation</li> </ul> <p><strong>So, how do you defeat the frame-busting buster?</strong></p> <p>One effective approach is to use the X-Frame-Options: deny directive, supported by most modern browsers. This directive prevents framing even when scripting is disabled:</p> <pre class="brush:php;toolbar:false">X-Frame-Options: deny</pre> <p><strong>Browser Support:</strong></p> <ul> <li> <strong>IE8:</strong> https://blogs.msdn.com/ie/archive/2009/01/27/ie8-security-part-vii-clickjacking-defenses.aspx</li> <li> <p><strong>Firefox (3.6.9):</strong></p> <ul> <li>https://bugzilla.mozilla.org/show_bug.cgi?id=475530</li> <li>https://developer.mozilla.org/en/The_X-FRAME-OPTIONS_response_header</li> </ul> </li> <li> <p><strong>Chrome/Webkit:</strong></p> <ul> <li>http://blog.chromium.org/2010/01/security-in-depth-new-security-features.html</li> <li>http://trac.webkit.org/changeset/42333</li> </ul> </li> </ul><p>The above is the detailed content of How Can I Defeat a Frame-Busting Buster That Bypasses Traditional Frame-Busting JavaScript?. 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Mastering these key points can effectively avoid common mistakes.</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796828200.html" title="Why should you place tags at the bottom of the ?" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175139053194540.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Why should you place tags at the bottom of the ?" /> </a> <a href="http://m.miracleart.cn/faq/1796828200.html" title="Why should you place tags at the bottom of the ?" class="phphistorical_Version2_mids_title">Why should you place tags at the bottom of the ?</a> <span id="377j5v51b" class="Articlelist_txts_time">Jul 02, 2025 am 01:22 AM</span> <p class="Articlelist_txts_p">PlacingtagsatthebottomofablogpostorwebpageservespracticalpurposesforSEO,userexperience,anddesign.1.IthelpswithSEObyallowingsearchenginestoaccesskeyword-relevanttagswithoutclutteringthemaincontent.2.Itimprovesuserexperiencebykeepingthefocusonthearticl</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796822037.html" title="JavaScript vs. Java: A Comprehensive Comparison for Developers" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175035006093854.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="JavaScript vs. Java: A Comprehensive Comparison for Developers" /> </a> <a href="http://m.miracleart.cn/faq/1796822037.html" title="JavaScript vs. Java: A Comprehensive Comparison for Developers" class="phphistorical_Version2_mids_title">JavaScript vs. Java: A Comprehensive Comparison for Developers</a> <span id="377j5v51b" class="Articlelist_txts_time">Jun 20, 2025 am 12:21 AM</span> <p class="Articlelist_txts_p">JavaScriptispreferredforwebdevelopment,whileJavaisbetterforlarge-scalebackendsystemsandAndroidapps.1)JavaScriptexcelsincreatinginteractivewebexperienceswithitsdynamicnatureandDOMmanipulation.2)Javaoffersstrongtypingandobject-orientedfeatures,idealfor</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796828191.html" title="What is event bubbling and capturing in the DOM?" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175139034116786.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What is event bubbling and capturing in the DOM?" /> </a> <a href="http://m.miracleart.cn/faq/1796828191.html" title="What is event bubbling and capturing in the DOM?" class="phphistorical_Version2_mids_title">What is event bubbling and capturing in the DOM?</a> <span id="377j5v51b" class="Articlelist_txts_time">Jul 02, 2025 am 01:19 AM</span> <p class="Articlelist_txts_p">Event capture and bubble are two stages of event propagation in DOM. Capture is from the top layer to the target element, and bubble is from the target element to the top layer. 1. Event capture is implemented by setting the useCapture parameter of addEventListener to true; 2. Event bubble is the default behavior, useCapture is set to false or omitted; 3. Event propagation can be used to prevent event propagation; 4. Event bubbling supports event delegation to improve dynamic content processing efficiency; 5. Capture can be used to intercept events in advance, such as logging or error processing. Understanding these two phases helps to accurately control the timing and how JavaScript responds to user operations.</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796822137.html" title="JavaScript: Exploring Data Types for Efficient Coding" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175035157160537.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="JavaScript: Exploring Data Types for Efficient Coding" /> </a> <a href="http://m.miracleart.cn/faq/1796822137.html" title="JavaScript: Exploring Data Types for Efficient Coding" class="phphistorical_Version2_mids_title">JavaScript: Exploring Data Types for Efficient Coding</a> <span id="377j5v51b" class="Articlelist_txts_time">Jun 20, 2025 am 12:46 AM</span> <p class="Articlelist_txts_p">JavaScripthassevenfundamentaldatatypes:number,string,boolean,undefined,null,object,andsymbol.1)Numbersuseadouble-precisionformat,usefulforwidevaluerangesbutbecautiouswithfloating-pointarithmetic.2)Stringsareimmutable,useefficientconcatenationmethodsf</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796824597.html" title="How can you reduce the payload size of a JavaScript application?" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175087047055234.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How can you reduce the payload size of a JavaScript application?" /> </a> <a href="http://m.miracleart.cn/faq/1796824597.html" title="How can you reduce the payload size of a JavaScript application?" class="phphistorical_Version2_mids_title">How can you reduce the payload size of a JavaScript application?</a> <span id="377j5v51b" class="Articlelist_txts_time">Jun 26, 2025 am 12:54 AM</span> <p class="Articlelist_txts_p">If JavaScript applications load slowly and have poor performance, the problem is that the payload is too large. Solutions include: 1. Use code splitting (CodeSplitting), split the large bundle into multiple small files through React.lazy() or build tools, and load it as needed to reduce the first download; 2. Remove unused code (TreeShaking), use the ES6 module mechanism to clear "dead code" to ensure that the introduced libraries support this feature; 3. Compress and merge resource files, enable Gzip/Brotli and Terser to compress JS, reasonably merge files and optimize static resources; 4. Replace heavy-duty dependencies and choose lightweight libraries such as day.js and fetch</p> </div> <div id="377j5v51b" class="phphistorical_Version2_mids"> <a href="http://m.miracleart.cn/faq/1796828216.html" title="A definitive JS roundup on JavaScript modules: ES Modules vs CommonJS" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/431/639/175139088179400.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="A definitive JS roundup on JavaScript modules: ES Modules vs CommonJS" /> </a> <a href="http://m.miracleart.cn/faq/1796828216.html" title="A definitive JS roundup on JavaScript modules: ES Modules vs CommonJS" class="phphistorical_Version2_mids_title">A definitive JS roundup on JavaScript modules: ES Modules vs CommonJS</a> <span id="377j5v51b" class="Articlelist_txts_time">Jul 02, 2025 am 01:28 AM</span> <p class="Articlelist_txts_p">The main difference between ES module and CommonJS is the loading method and usage scenario. 1.CommonJS is synchronously loaded, suitable for Node.js server-side environment; 2.ES module is asynchronously loaded, suitable for network environments such as browsers; 3. Syntax, ES module uses import/export and must be located in the top-level scope, while CommonJS uses require/module.exports, which can be called dynamically at runtime; 4.CommonJS is widely used in old versions of Node.js and libraries that rely on it such as Express, while ES modules are suitable for modern front-end frameworks and Node.jsv14; 5. Although it can be mixed, it can easily cause problems.</p> </div> </div> <a href="http://m.miracleart.cn/web-designer.html" class="phpgenera_Details_mainL4_botton"> <span>See all articles</span> <img src="/static/imghw/down_right.png" alt="" /> </a> </div> </div> </div> </main> <footer> <div id="377j5v51b" class="footer"> <div id="377j5v51b" class="footertop"> <img src="/static/imghw/logo.png" alt=""> <p>Public welfare online PHP training，Help PHP learners grow quickly！</p> </div> <div id="377j5v51b" class="footermid"> <a href="http://m.miracleart.cn/about/us.html">About us</a> <a href="http://m.miracleart.cn/about/disclaimer.html">Disclaimer</a> <a href="http://m.miracleart.cn/update/article_0_1.html">Sitemap</a> </div> <div id="377j5v51b" class="footerbottom"> <p> ? php.cn All rights reserved </p> </div> </div> </footer> <input type="hidden" id="verifycode" value="/captcha.html"> <link rel='stylesheet' id='_main-css' href='/static/css/viewer.min.css?2' type='text/css' media='all' /> 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