{"id":4519,"date":"2020-03-03T15:30:06","date_gmt":"2020-03-03T13:30:06","guid":{"rendered":"https:\/\/blog.eset.ee\/?p=4519"},"modified":"2020-03-03T15:42:04","modified_gmt":"2020-03-03T13:42:04","slug":"krook-serious-vulnerability-affected-encryption-of-billion-wi%e2%80%91fi-devices","status":"publish","type":"post","link":"https:\/\/blog.eset.ee\/et\/en\/2020\/03\/03\/krook-serious-vulnerability-affected-encryption-of-billion-wi%e2%80%91fi-devices\/","title":{"rendered":"Kr\u00d8\u00d8k: Serious vulnerability affected encryption of billion+ Wi\u2011Fi devices"},"content":{"rendered":"\n

ESET Research has published its latest white paper,\u00a0Kr\u00d8\u00d8k \u2013 CVE-2019-15126: Serious vulnerability deep inside your Wi-Fi encryption<\/a>. This blogpost summarizes that white paper, authored by researchers Milo\u0161 \u010cerm\u00e1k, Robert Lipovsk\u00fd and \u0160tefan Svoren\u010d\u00edk.\u00a0For updated information regarding patches by individual vendors, readers can also refer to our\u00a0dedicated webpage<\/a>.<\/p>\n\n\n\n

ESET researchers discovered a previously unknown vulnerability in Wi-Fi chips and named it Kr\u00d8\u00d8k. This serious flaw, assigned CVE-2019-15126, causes vulnerable devices to use an all-zero encryption key to encrypt part of the user\u2019s communication. In a successful attack, this allows an adversary to decrypt some wireless network packets transmitted by a vulnerable device.<\/p>\n\n\n\n

Kr\u00d8\u00d8k affects devices with Wi-Fi chips by Broadcom and Cypress that haven\u2019t yet been patched. These are the most common Wi-Fi chips used in contemporary Wi-Fi capable devices such as smartphones, tablets, laptops, and IoT gadgets.<\/p>\n\n\n\n

Kr\u00d8\u00d8k \u2013 CVE\u20112019\u201115126: Serious vulnerability deep inside your Wi\u2011Fi encryption<\/a>Download Research Paper<\/a><\/p>\n\n\n\n

\"\"\/<\/a><\/figure>\n\n\n\n

Not only client devices but also Wi-Fi access points and routers with Broadcom chips were affected by the vulnerability, thus making many environments with unaffected or already patched client devices vulnerable anyway.<\/p>\n\n\n\n

Our tests confirmed that prior to patching, some client devices by Amazon (Echo, Kindle), Apple (iPhone, iPad, MacBook), Google (Nexus), Samsung (Galaxy), Raspberry (Pi 3), Xiaomi (RedMi), as well as some access points by Asus and Huawei, were vulnerable to Kr\u00d8\u00d8k. This totaled to over a billion Wi-Fi-capable devices and access points, at a conservative estimate. Further, many other vendors whose products we did not test also use the affected chipsets in their devices.<\/p>\n\n\n\n

The vulnerability affects both WPA2-Personal and WPA2-Enterprise protocols, with AES-CCMP encryption.<\/p>\n\n\n\n

Kr\u00d8\u00d8k is related to KRACK<\/a> (Key Reinstallation Attacks), discovered in 2017 by Mathy Vanhoef, but also fundamentally different. In the beginning of our research, we found Kr\u00d8\u00d8k to be one of the possible causes behind the \u201creinstallation\u201d of an all-zero encryption key, observed in tests for KRACK attacks. This followed our previous findings that Amazon Echo was vulnerable to KRACK<\/a>.<\/p>\n\n\n\n

We responsibly disclosed the vulnerability to chip manufacturers Broadcom and Cypress, who subsequently released updates during an extended disclosure period. We also worked with the Industry Consortium for Advancement of Security on the Internet (ICASI<\/a>) to ensure that all potentially affected parties \u2013 including affected device manufacturers using the vulnerable chips, as well as any other possibly affected chip manufacturers \u2013 were aware of Kr\u00d8\u00d8k.<\/p>\n\n\n\n

According to our information, patches for devices by major manufacturers have been released by now. To protect yourself, as a user, make sure you have applied the latest available updates to your Wi-Fi-capable devices, including phones, tablets, laptops, IoT devices, and Wi-Fi access points and routers. As a device manufacturer, please inquire about patches for the Kr\u00d8\u00d8k vulnerability directly with your chip manufacturer.<\/p>\n\n\n\n

These findings were presented publicly for the first time at the RSA Conference 2020<\/a>.<\/p>\n\n\n\n

Special thanks to our colleagues Juraj Bartko and Martin Kaluznik, who greatly contributed to this research. We\u2019d also like to commend Amazon, Broadcom, and Cypress for their good cooperation on dealing with the reported issues and ICASI for their assistance in informing as many of the impacted vendors as possible.
<\/p>\n","protected":false},"excerpt":{"rendered":"

ESET Research has published its latest white paper,\u00a0Kr\u00d8\u00d8k \u2013 CVE-2019-15126: Serious vulnerability deep inside your Wi-Fi encryption. This blogpost summarizes that white paper, authored by researchers Milo\u0161 \u010cerm\u00e1k, Robert Lipovsk\u00fd and \u0160tefan Svoren\u010d\u00edk.\u00a0For updated information regarding patches by individual vendors, readers can also refer to our\u00a0dedicated webpage. ESET researchers discovered a previously unknown vulnerability in<\/p>\n","protected":false},"author":5,"featured_media":4520,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[363],"tags":[],"class_list":["post-4519","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vulnerability"],"acf":[],"yoast_head":"\nKr\u00d8\u00d8k: Serious vulnerability affected encryption of billion+ Wi\u2011Fi devices - ESET Eesti Blogi<\/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:\/\/blog.eset.ee\/et\/en\/2020\/03\/03\/krook-serious-vulnerability-affected-encryption-of-billion-wi%e2%80%91fi-devices\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kr\u00d8\u00d8k: Serious vulnerability affected encryption of billion+ Wi\u2011Fi devices\" \/>\n<meta property=\"og:description\" content=\"ESET Research has published its latest white paper,\u00a0Kr\u00d8\u00d8k \u2013 CVE-2019-15126: Serious vulnerability deep inside your Wi-Fi encryption. 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