{"id":2094,"date":"2009-09-14T10:21:31","date_gmt":"2009-09-14T10:21:31","guid":{"rendered":"https:\/\/www.darknet.org.uk\/?p=2094"},"modified":"2015-09-09T19:37:55","modified_gmt":"2015-09-09T11:37:55","slug":"4f-the-file-format-fuzzing-framework","status":"publish","type":"post","link":"https:\/\/www.darknet.org.uk\/2009\/09\/4f-the-file-format-fuzzing-framework\/","title":{"rendered":"4f: The File Format Fuzzing Framework"},"content":{"rendered":"<p>4f is a file format <a href=\"https:\/\/www.darknet.org.uk\/tag\/fuzzing-framework\/\">fuzzing framework<\/a>. 4f uses modules which are specifications of the targeted binary or text file format that tell it how to fuzz the target application. If 4f detects a crash, it will log crucial information important for allowing the 4f user to reproduce the problem and also debugging information important to deciding the severity of the bug and its exploitability.<\/p>\n<p>4f&#8217;s purpose is to find vulnerabilities in code that parses file formats including configuration files.<\/p>\n<p>4f uses specialized modules for fuzzing code that interprets file formats. Several modules are included and more can be written to follow other file formats.<\/p>\n<p>A module system is in place for fuzzing any file format you like as long as you know its specification<\/p>\n<p>Custom debugger gathers crucial debugging information on crash, logs it, then continues fuzzing.<\/p>\n<p><strong>Usage<\/strong><\/p>\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3033787195489589\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- Darknet Responsive Post Ad Links [previously link ad unit] -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-3033787195489589\"\r\n     data-ad-slot=\"5456620019\"\r\n     data-ad-format=\"auto\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<pre>USAGE DETAILS\r\n\r\nUSAGE:   .\/4f <-T \/usr\/bin\/target> <-M #> [-N fuzz.conf]\r\n         [-A ARGS] [-R \/output] [-L log.txt] [-C] [-D]\r\n\r\nINFO:    [-O Fuzzing Oracle] [-S Modules Available]<\/pre>\n<p>You can download 4f here:<\/p>\n<p><a href=\"http:\/\/www.krakowlabs.com\/dev\/fuz\/4f\/4f.tar.gz\">4f.tar.gz<\/a><\/p>\n<p>Or read more <a href=\"http:\/\/www.krakowlabs.com\">here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>4f is a file format fuzzing framework. 4f uses modules which are specifications of the targeted binary or text file format that tell it how to fuzz the target application. If 4f detects a crash, it will log crucial information important for allowing the 4f user to reproduce the problem and also debugging information important [&hellip;]<\/p>\n","protected":false},"author":25,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[10,29],"tags":[2340,1278,1989,2226],"featured_image_src":null,"featured_image_src_square":null,"author_info":{"display_name":"Darknet","author_link":"https:\/\/www.darknet.org.uk\/author\/darknet\/"},"_links":{"self":[{"href":"https:\/\/www.darknet.org.uk\/wp-json\/wp\/v2\/posts\/2094"}],"collection":[{"href":"https:\/\/www.darknet.org.uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.darknet.org.uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.darknet.org.uk\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/www.darknet.org.uk\/wp-json\/wp\/v2\/comments?post=2094"}],"version-history":[{"count":0,"href":"https:\/\/www.darknet.org.uk\/wp-json\/wp\/v2\/posts\/2094\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.darknet.org.uk\/wp-json\/wp\/v2\/media?parent=2094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.darknet.org.uk\/wp-json\/wp\/v2\/categories?post=2094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.darknet.org.uk\/wp-json\/wp\/v2\/tags?post=2094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}