{"id":10609,"date":"2022-07-07T09:32:39","date_gmt":"2022-07-07T09:32:39","guid":{"rendered":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/?post_type=session&#038;p=10609"},"modified":"2024-09-03T02:23:34","modified_gmt":"2024-09-03T02:23:34","slug":"commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy","status":"publish","type":"session","link":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/","title":{"rendered":"COMMSEC: Leaking Kakao &#8211; How a Combination of Bugs in KakaoTalk Compromises User Privacy"},"content":{"rendered":"<div class=\"simple_format\">\n<p><strong><a href=\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/materials\/D1%20COMMSEC%20-%20Leaking%20Kakao%20-%20How%20a%20Combination%20of%20Bugs%20in%20KakaoTalk%20Compromises%20User%20Privacy%20-%20Dawin%20Schmidt.pdf\">PRESENTATION SLIDES<\/a><\/strong><\/p>\n<p style=\"text-align: justify;\">KakaoTalk is the WhatsApp of South Korea with more than 100 million downloads from the Google Playstore. In this talk we show how multiple vulnerabilities in a chat app can lead to the disclosure of users&#8217; messages. We start by showing an account takeover &#8220;one-click&#8221; exploit in KakaoTalk&#8217;s regular chat room without breaking cryptography or escaping the app&#8217;s sandbox. Next, we present how the app&#8217;s end-to-end encryption feature &#8220;Secure Chat&#8221; works and discuss a couple of protocol weaknesses. One of the issues is a well-known server-side MITM attack where Kakao Corp. can secretly replace public keys without immediate user notification. We also release our tooling so that fellow security researchers can dig into KakaoTalk&#8217;s broad attack surface to find more bugs.<\/p>\n<\/div>\n","protected":false},"template":"","class_list":["post-10609","session","type-session","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>COMMSEC: Leaking Kakao - How a Combination of Bugs in KakaoTalk Compromises User Privacy - HITBSecConf2024 - Bangkok<\/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:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"COMMSEC: Leaking Kakao - How a Combination of Bugs in KakaoTalk Compromises User Privacy - HITBSecConf2024 - Bangkok\" \/>\n<meta property=\"og:description\" content=\"PRESENTATION SLIDES KakaoTalk is the WhatsApp of South Korea with more than 100 million downloads from the Google Playstore. In this talk we show how multiple vulnerabilities in a chat app can lead to the disclosure of users&#8217; messages. We start by showing an account takeover &#8220;one-click&#8221; exploit in KakaoTalk&#8217;s regular chat room without breaking [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/\" \/>\n<meta property=\"og:site_name\" content=\"HITBSecConf2024 - Bangkok\" \/>\n<meta property=\"article:modified_time\" content=\"2024-09-03T02:23:34+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/\",\"url\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/\",\"name\":\"COMMSEC: Leaking Kakao - How a Combination of Bugs in KakaoTalk Compromises User Privacy - HITBSecConf2024 - Bangkok\",\"isPartOf\":{\"@id\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/#website\"},\"datePublished\":\"2022-07-07T09:32:39+00:00\",\"dateModified\":\"2024-09-03T02:23:34+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Session\",\"item\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"COMMSEC: Leaking Kakao &#8211; How a Combination of Bugs in KakaoTalk Compromises User Privacy\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/#website\",\"url\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/\",\"name\":\"HITBSecConf2024 - Bangkok\",\"description\":\"August 26 - 30 @ InterContinental\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"COMMSEC: Leaking Kakao - How a Combination of Bugs in KakaoTalk Compromises User Privacy - HITBSecConf2024 - Bangkok","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/","og_locale":"en_US","og_type":"article","og_title":"COMMSEC: Leaking Kakao - How a Combination of Bugs in KakaoTalk Compromises User Privacy - HITBSecConf2024 - Bangkok","og_description":"PRESENTATION SLIDES KakaoTalk is the WhatsApp of South Korea with more than 100 million downloads from the Google Playstore. In this talk we show how multiple vulnerabilities in a chat app can lead to the disclosure of users&#8217; messages. We start by showing an account takeover &#8220;one-click&#8221; exploit in KakaoTalk&#8217;s regular chat room without breaking [&hellip;]","og_url":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/","og_site_name":"HITBSecConf2024 - Bangkok","article_modified_time":"2024-09-03T02:23:34+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/","url":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/","name":"COMMSEC: Leaking Kakao - How a Combination of Bugs in KakaoTalk Compromises User Privacy - HITBSecConf2024 - Bangkok","isPartOf":{"@id":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/#website"},"datePublished":"2022-07-07T09:32:39+00:00","dateModified":"2024-09-03T02:23:34+00:00","breadcrumb":{"@id":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/commsec-leaking-kakao-how-a-combination-of-bugs-in-kakaotalk-compromises-user-privacy\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/"},{"@type":"ListItem","position":2,"name":"Session","item":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/session\/"},{"@type":"ListItem","position":3,"name":"COMMSEC: Leaking Kakao &#8211; How a Combination of Bugs in KakaoTalk Compromises User Privacy"}]},{"@type":"WebSite","@id":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/#website","url":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/","name":"HITBSecConf2024 - Bangkok","description":"August 26 - 30 @ InterContinental","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/wp-json\/wp\/v2\/session\/10609"}],"collection":[{"href":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/wp-json\/wp\/v2\/session"}],"about":[{"href":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/wp-json\/wp\/v2\/types\/session"}],"wp:attachment":[{"href":"https:\/\/conference.hitb.org\/hitbsecconf2024bkk\/wp-json\/wp\/v2\/media?parent=10609"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}