{"id":189768,"date":"2016-11-29T13:33:40","date_gmt":"2016-11-29T11:33:40","guid":{"rendered":"http:\/\/mybroadband.co.za\/news\/?p=189768"},"modified":"2016-11-29T13:35:15","modified_gmt":"2016-11-29T11:35:15","slug":"major-windows-10-upgrade-security-risk","status":"publish","type":"post","link":"https:\/\/mybroadband.co.za\/news\/security\/189768-major-windows-10-upgrade-security-risk.html","title":{"rendered":"Major Windows 10 upgrade security risk"},"content":{"rendered":"<p>Microsoft MVP, speaker, and trainer\u00a0Sami Laiho has discovered a bug in Windows 10 &#8211; that predominantly affects Insider Builds &#8211; which could give an attacker privileged access to a system.<\/p>\n<p>During a Feature Update, <strong><a href=\"http:\/\/blog.win-fu.com\/2016\/11\/every-windows-10-in-place-upgrade-is.html\" target=\"_blank\">Laiho wrote<\/a><\/strong>\u00a0it is possible to press SHIFT+F10 to bring up a Command Prompt.<\/p>\n<p>This feature has been around since Windows 7, but the problem is that Microsoft disables its BitLocker encryption service during the upgrade &#8211; giving\u00a0an attacker\u00a0access to the hard disk.<\/p>\n<p>The elevation of privilege that lets\u00a0a non-administrative user get\u00a0System user access,\u00a0even on a BitLocker-protected machine, is an issue.<\/p>\n<p>Laiho said this\u00a0exploit becomes available under the following conditions:<\/p>\n<ul>\n<li>Upgrading from Windows 10 RTM to the\u00a0November Update (1511) or Anniversary Update (1607).<\/li>\n<li>Upgrading from any build to a newer Insider Build, tested up to end of October 2016.<\/li>\n<\/ul>\n<p>Laiho offered the following attack scenarios:<\/p>\n<ul>\n<li>An internal threat who wants admin access just has to wait for the next upgrade, or convince someone that he should be a Windows\u00a0Insider.<\/li>\n<li>An external threat with\u00a0access to the\u00a0computer waits for it to start an upgrade to get into the system.<\/li>\n<\/ul>\n<p>For enterprises,\u00a0System Center Configuration Manager can block this. For unmanaged networks, Laiho offered the following advice:<\/p>\n<ul>\n<li>Don&#8217;t allow unattended upgrades.<\/li>\n<li>Keep very tight watch on Windows Insiders.<\/li>\n<li>Controversially: stick to the Long Term Servicing Branch\u00a0version of Windows 10 for now.<\/li>\n<\/ul>\n<p>Laiho published a video of the attack <strong><a href=\"http:\/\/blog.win-fu.com\/2016\/11\/every-windows-10-in-place-upgrade-is.html\" target=\"_blank\">on his website<\/a><\/strong>.<\/p>\n<h3 class=\"my-4\">Now read:\u00a0<a href=\"http:\/\/mybroadband.co.za\/news\/software\/185848-new-windows-10-updates-will-be-a-lot-smaller-to-download.html\">New Windows 10 updates will be a lot smaller to download<\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"<p>There is a flaw in Windows 10 that lets non-administrative users gain System-level access during upgrades of certain versions of the operating system.<\/p>\n","protected":false},"author":23,"featured_media":110808,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[36,123,26970],"class_list":["post-189768","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-active","tag-microsoft","tag-windows-10"],"_links":{"self":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/189768"}],"collection":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/comments?post=189768"}],"version-history":[{"count":2,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/189768\/revisions"}],"predecessor-version":[{"id":189782,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/189768\/revisions\/189782"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media\/110808"}],"wp:attachment":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media?parent=189768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/categories?post=189768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/tags?post=189768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}