{"id":41061,"date":"2021-05-26T10:52:40","date_gmt":"2021-05-26T10:52:40","guid":{"rendered":"http:\/\/837405a7-52b3-405b-b257-636cf099f15b"},"modified":"2021-05-26T10:52:40","modified_gmt":"2021-05-26T10:52:40","slug":"bluetooth-bugs-open-the-door-for-attackers-to-impersonate-devices","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/bluetooth-bugs-open-the-door-for-attackers-to-impersonate-devices\/","title":{"rendered":"Bluetooth bugs open the door for attackers to impersonate devices"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/www.zdnet.com\/a\/hub\/i\/r\/2021\/05\/26\/8e36f296-ded2-48d0-bd80-2b7f1cbad821\/thumbnail\/770x578\/0e11610edecde0a263c022f3a650944c\/screenshot-2021-05-26-at-09-41-42.png\" class=\"ff-og-image-inserted\"><\/div>\n<p>Threat actors could exploit vulnerabilities in the Bluetooth Core and Mesh specifications to impersonate devices during pairing, paving the way to man-in-the-middle (MITM) attacks.&nbsp;<\/p>\n<p>The vulnerabilities, disclosed by researchers at the Agence nationale de la s\u00e9curit\u00e9 des syst\u00e8mes d&#8217;information (ANSSI) and <a href=\"https:\/\/kb.cert.org\/vuls\/id\/799380\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">disclosed on Monday<\/a>, allow for &#8220;impersonation attacks and AuthValue disclosures&#8221; according to a Carnegie Mellon University CERT Coordination Center advisory.<\/p>\n<p>Bluetooth <a href=\"https:\/\/www.bluetooth.com\/bluetooth-resources\/bluetooth-5-go-faster-go-further\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">Core<\/a> and <a href=\"https:\/\/www.bluetooth.com\/learn-about-bluetooth\/bluetooth-technology\/topology-options\/le-mesh\/mesh-faq\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">Mesh<\/a> are separate specifications suitable for low-energy and Internet of Things (IoT) devices or and many-to-many (m:m) device communication for large-scale networks.&nbsp; <\/p>\n<p>The vulnerabilities are as follows: <\/p>\n<p><strong>CVE-2020-26558<\/strong>: A vulnerability in the Passkey Entry protocol, used during Secure Simple Pairing (SSP), Secure Connections (SC), and LE Secure Connections (LESC) in Bluetooth Core (v.21 &#8211; 5.2). Crafted responses could be sent during pairing by an attacker to determine each bit of the randomly generated Passkey generated during pairing, leading to impersonation.&nbsp; <\/p>\n<p><strong>CVE-2020-26555<\/strong>: Another vulnerability in Bluetooth Core (v1.0B through 5.2), the BR\/EDR PIN Pairing procedure can also be abused for the purposes of impersonation. Attackers could spoof Bluetooth device addresses of a target device, reflect encrypted nonces, and complete BR\/EDR pin-code pairing without knowing the pin code. This attack requires a malicious device to be in wireless range.&nbsp; <\/p>\n<p><strong>CVE-2020-26560<\/strong>: Impacting Bluetooth Mesh (v.1.0, 1.0.1), this vulnerability could allow attackers to spoof devices being provisioned via crafted responses created to appear to possess an AuthValue.This may give them access to a valid NetKey and AppKey. An attacker&#8217;s device needs to be in the wireless range of a Mesh Provisioner. &nbsp; <\/p>\n<section class=\"sharethrough-top\" data-component=\"medusaContentRecommendation\" data-medusa-content-recommendation-options=\"{&quot;promo&quot;:&quot;promo_zd_recommendation_sharethrough_top_in_article_desktop&quot;,&quot;spot&quot;:&quot;dfp-in-article&quot;}\"> <\/section>\n<p><strong>CVE-2020-26557<\/strong>: Affecting Bluetooth Mesh (v.1.0, 1.0.1), the Mesh Provisioning protocol could allow attackers to perform a brute-force attack and secure a fixed value AuthValue, or one that is &#8220;selected predictably or with low entropy,&#8221; leading to MiTM attacks on future provisioning attempts.&nbsp; <\/p>\n<p><strong>CVE-2020-26556<\/strong>: If the AuthValue can be identified during provisioning, the Bluetooth Mesh authentication protocol (v.1.0, 1.0.1) is vulnerable and may be abused to secure a Netkey. However, the researchers note that attackers must identify the AuthValue before a session timeout.&nbsp; <\/p>\n<p><strong>CVE-2020-26559<\/strong>: The Mesh Provisioning procedure used by Bluetooth Mesh (v.1.0, 1.0.1) allows attackers, with provision &#8212; but without access to the AuthValue &#8212; to identify the AuthValue without the need for a brute-force attack.&nbsp; <\/p>\n<p>&#8220;Even when a randomly generated AuthValue with a full 128-bits of entropy is used, an attacker acquiring the provisioner&#8217;s public key, provisioning confirmation value, and provisioning random value, and providing its public key for use in the provisioning procedure, will be able to compute the AuthValue directly,&#8221; the advisory reads.&nbsp; <\/p>\n<p>The researchers also identified a potential vulnerability in Bluetooth Core relating to LE Legacy Pairing in versions 4.0 to 5.2 which could allow an attacker-controlled device to perform pairing without knowledge of temporary keys (TK).&nbsp; <\/p>\n<p>The Android open source project, Cisco, Cradlepoint, Intel, Microchip Technology, and Red Hat are cited as vendors with software vulnerable to the disclosed vulnerabilities, in some form or another.&nbsp; <\/p>\n<p>The Android open source project said, &#8220;Android has assessed this issue as High severity for Android OS and will be issuing a patch for this vulnerability in an upcoming Android security bulletin.&#8221; <\/p>\n<p>Cisco said: <\/p>\n<blockquote readability=\"7\">\n<p>&#8220;Cisco has investigated the impact of the aforementioned Bluetooth Specification vulnerabilities and is currently waiting for all the individual product development teams to provide software fixes to address them.&#8221; <\/p>\n<\/blockquote>\n<p>Microchip Technologies is <a href=\"http:\/\/aem-origin.microchip.com\/en-us\/products\/wireless-connectivity\/software-vulnerability-response\/anssi-bluetooth-core-vulnerabilities\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">also working<\/a> on patches.&nbsp; <\/p>\n<p>Red Hat, Cradlepoint, and Intel did not issue the team statements ahead of public disclosure.&nbsp; <\/p>\n<p>Bluetooth Special Interest Group (SIG), which works on the development of global Bluetooth standards, has also published <a href=\"https:\/\/www.bluetooth.com\/learn-about-bluetooth\/key-attributes\/bluetooth-security\/reporting-security\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">separate security advisories<\/a>.&nbsp; <\/p>\n<p>To mitigate the risk of exploit, updates from operating system manufacturers should be accepted once they are made available.&nbsp; <\/p>\n<p>The research follows a separate Bluetooth-related security issue disclosed in September 2020 by Purdue University academics.&nbsp;Dubbed the Bluetooth Low Energy Spoofing Attack (<a href=\"https:\/\/www.zdnet.com\/article\/billions-of-devices-vulnerable-to-new-blesa-bluetooth-security-flaw\/\" target=\"_blank\" rel=\"noopener noreferrer\">BLESA<\/a>), the vulnerability impacts devices running on the Bluetooth Low Energy (BLE) protocol, a system used when limited battery power is available.&nbsp;<\/p>\n<p>ZDNet has reached out to Red Hat, Cradlepoint, and Intel and we will update when we hear back.&nbsp; <\/p>\n<h3> Previous and related coverage <\/h3>\n<hr>\n<p><strong>Have a tip?<\/strong> Get in touch securely via WhatsApp | Signal at +447713 025 499, or over at Keybase: charlie0<\/p>\n<hr>\n<p> READ MORE <a href=\"https:\/\/www.zdnet.com\/article\/bluetooth-bugs-open-the-door-for-attackers-to-impersonate-devices\/#ftag=RSSbaffb68\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Devices supporting the Bluetooth Core and Mesh specifications are impacted.<br \/>\nREAD MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":41062,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[62],"tags":[],"class_list":["post-41061","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zdnet-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bluetooth bugs open the door for attackers to impersonate devices 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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