{"id":8249,"date":"2017-01-13T16:37:00","date_gmt":"2017-01-13T16:37:00","guid":{"rendered":"https:\/\/www.kaspersky.co.uk\/blog\/?p=8249"},"modified":"2017-11-06T14:00:46","modified_gmt":"2017-11-06T14:00:46","slug":"whatsapp-security-hole","status":"publish","type":"post","link":"https:\/\/www.kaspersky.co.uk\/blog\/whatsapp-security-hole\/8249\/","title":{"rendered":"Security hole in WhatsApp and how to fix it"},"content":{"rendered":"<p>Friday the 13th is always a day that superstitious people look to find bad news tied to random events or actions, like a black cat crossing their path or breaking a mirror. However on some occasions, bad news can also break on such an \u201cunlucky\u201d day.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-8253\" src=\"https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-1024x672.jpg\" alt=\"\" width=\"1024\" height=\"672\" srcset=\"https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-1024x672.jpg 1024w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-300x197.jpg 300w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-768x504.jpg 768w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-200x131.jpg 200w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-315x207.jpg 315w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-495x325.jpg 495w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-700x459.jpg 700w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-900x591.jpg 900w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192822\/whatsapp-encryption-issues-267x175.jpg 267w\" sizes=\"auto, (min-width: 1024px) 670px, 100vw\"><\/p>\n<p>Today, marks one of those occasions as <em>The Guardian<\/em> broke a story entitled <a href=\"https:\/\/www.theguardian.com\/technology\/2017\/jan\/13\/whatsapp-backdoor-allows-snooping-on-encrypted-messages\" target=\"_blank\" rel=\"noopener nofollow\">WhatsApp backdoor allows snooping on encrypted messages<\/a>. The story focuses on a reported security backdoor from researcher <a href=\"https:\/\/www.heise.de\/newsticker\/meldung\/WhatsApp-Bug-erlaubt-Einblick-in-verschluesselte-Nachrichten-3595611.html\" target=\"_blank\" rel=\"noopener nofollow\">Tobias Boelter<\/a>.<\/p>\n<p>According to the exclusive in the Guardian:<\/p>\n<p><em>WhatsApp\u2019s end-to-end encryption relies on the generation of unique security keys, using the acclaimed Signal protocol, <a href=\"https:\/\/www.theguardian.com\/technology\/2016\/apr\/05\/whatsapp-rolls-out-full-encryption-to-a-billion-messenger-users\" target=\"_blank\" rel=\"noopener nofollow\">developed by Open Whisper Systems<\/a>, that are traded and verified between users to guarantee communications are secure and cannot be intercepted by a middleman. However, WhatsApp has the ability to force the generation of new encryption keys for offline users, unbeknown to the sender and recipient of the messages, and to make the sender re-encrypt messages with new keys and send them again for any messages that have not been marked as delivered.<\/em><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">How private is that private messenger really? <a href=\"https:\/\/t.co\/V7nGJpEikU\" target=\"_blank\" rel=\"noopener nofollow\">https:\/\/t.co\/V7nGJpEikU<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/mobile?src=hash&amp;ref_src=twsrc%5Etfw\" target=\"_blank\" rel=\"noopener nofollow\">#mobile<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/messenger?src=hash&amp;ref_src=twsrc%5Etfw\" target=\"_blank\" rel=\"noopener nofollow\">#messenger<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/privacy?src=hash&amp;ref_src=twsrc%5Etfw\" target=\"_blank\" rel=\"noopener nofollow\">#privacy<\/a> <a href=\"https:\/\/t.co\/WPESX5lR16\" target=\"_blank\" rel=\"noopener nofollow\">pic.twitter.com\/WPESX5lR16<\/a><\/p>\n<p>\u2014 Kaspersky (@kaspersky) <a href=\"https:\/\/twitter.com\/kaspersky\/status\/819234856504881154?ref_src=twsrc%5Etfw\" target=\"_blank\" rel=\"noopener nofollow\">January 11, 2017<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p><em>The recipient is not made aware of this change in encryption, while the sender is only notified if they have opted-in to encryption warnings in settings, and only after the messages have been re-sent. This re-encryption and rebroadcasting effectively allows WhatsApp to intercept and read users\u2019 messages.<\/em><\/p>\n<p>https:\/\/twitter.com\/FredericJacobs\/status\/819869917499588608<\/p>\n<p>While there are conflicts around whether this is a true bug or feature, \u00a0the fact remains that this is something that users of WhatsApp can fix themselves. To do this, users need to do the following:<\/p>\n<p>Android: Press <em>Account<\/em>, then <em>Security<\/em>, and then click on <em>Show security notifications<em>.<\/em><\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-8254\" src=\"https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-576x1024.png\" alt=\"\" width=\"576\" height=\"1024\" srcset=\"https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-576x1024.png 576w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-169x300.png 169w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-113x200.png 113w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-118x210.png 118w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-186x330.png 186w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-262x465.png 262w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-563x1000.png 563w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-338x600.png 338w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192821\/whatsapp-security-notifications-android-98x175.png 98w\" sizes=\"auto, (max-width: 576px) 100vw, 576px\"><\/p>\n<p>iOS: Click the cog in lower right, then press <em>Account<\/em> \u2192 <em>Security<\/em> \u2192 <em>Show security notifications<\/em>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-8255\" src=\"https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-576x1024.jpg\" alt=\"\" width=\"576\" height=\"1024\" srcset=\"https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-576x1024.jpg 576w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-169x300.jpg 169w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-112x200.jpg 112w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-118x210.jpg 118w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-186x330.jpg 186w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-261x465.jpg 261w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-562x1000.jpg 562w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-337x600.jpg 337w, https:\/\/media.kasperskydaily.com\/wp-content\/uploads\/sites\/86\/2017\/01\/05192820\/whatsapp-security-notifications-iphone-98x175.jpg 98w\" sizes=\"auto, (max-width: 576px) 100vw, 576px\"><\/p>\n<p>If you receive the security alert below (iOS screenshot), and you are having a sensitive conversation and want to be <em>sure<\/em>no one is evesdropping, the best way is to wait until the user comes back online and you can confirm and enable the end-to-end encryption back.<\/p>\n<p>As we mentioned in our <a href=\"https:\/\/www.kaspersky.co.uk\/blog\/33c3-private-messenger-basics\/13820\/\" target=\"_blank\" rel=\"noopener\">Private Messenger post<\/a>, these messengers and the notion of true privacy are quite complex. We urge you to make sure that you keep an eye on the security settings to keep your data safe. We will also provide you tips on privacy and security on Kaspersky Daily multiple times per week, so be sure to tune in.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How you can fix the security hole within WhatsApp.<\/p>\n","protected":false},"author":636,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,2026,9],"tags":[261,211,131,526],"class_list":["post-8249","post","type-post","status-publish","format-standard","category-news","category-threats","category-tips","tag-encryption","tag-social-media","tag-tips","tag-whatsapp"],"hreflang":[{"hreflang":"en-gb","url":"https:\/\/www.kaspersky.co.uk\/blog\/whatsapp-security-hole\/8249\/"}],"acf":[],"banners":"","maintag":{"url":"https:\/\/www.kaspersky.co.uk\/blog\/tag\/whatsapp\/","name":"WhatsApp"},"_links":{"self":[{"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/posts\/8249","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/users\/636"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=8249"}],"version-history":[{"count":1,"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/posts\/8249\/revisions"}],"predecessor-version":[{"id":11888,"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/posts\/8249\/revisions\/11888"}],"wp:attachment":[{"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=8249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=8249"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kaspersky.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=8249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}