{"id":51293,"date":"2023-03-31T01:00:01","date_gmt":"2023-03-31T01:00:01","guid":{"rendered":"https:\/\/www.threatshub.org\/blog\/azure-blunder-left-bing-results-editable-ms-365-accounts-potentially-exposed\/"},"modified":"2023-03-31T01:00:01","modified_gmt":"2023-03-31T01:00:01","slug":"azure-blunder-left-bing-results-editable-ms-365-accounts-potentially-exposed","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/azure-blunder-left-bing-results-editable-ms-365-accounts-potentially-exposed\/","title":{"rendered":"Azure blunder left Bing results editable, MS 365 accounts potentially exposed"},"content":{"rendered":"<p>An Azure Active Directory (AAD) misconfiguration by Microsoft in one of its own cloud-hosted applications could have allowed miscreants to subvert the IT giant&#8217;s Bing search engine \u2013 even changing search results.<\/p>\n<p>User information including Outlook emails, calendars, and Teams messages was also left vulnerable to potential theft and snooping.<\/p>\n<p>Wiz researchers discovered the security blunder, and said the error \u2013&nbsp;which they dubbed BingBang \u2013 was due to an authorization misconfiguration by Microsoft for its own multi-tenant apps in AAD.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"condor\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>(And this is after Redmond <a target=\"_blank\" href=\"https:\/\/www.theregister.com\/2023\/03\/21\/microsoft_aws_cloud_benchmarks\/\" rel=\"noopener\">passed around<\/a> notes on how to secure hosts on rival clouds.)<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xmd=\",fluid,mpu,leaderboard,\" data-lg=\",fluid,mpu,leaderboard,\" data-xlg=\",fluid,billboard,superleaderboard,mpu,leaderboard,\" data-xxlg=\",fluid,billboard,superleaderboard,brandwidth,brandimpact,leaderboard,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<div class=\"adun_eagle_desktop_story_wrapper\">\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"mid\" data-raptor=\"eagle\" data-xxlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<\/p><\/div>\n<p>Apps that use AAD can be configured as single-tenant or multi-tenant. Multi-tenant apps allow logins from potentially any Azure user. It&#8217;s the developer&#8217;s responsibility to perform additional authorization checks and decide which users should be allowed to access the app.<\/p>\n<p>However, as one of the researchers, Hillai Ben-Sasson, noted in a <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/twitter.com\/hillai\/status\/1641146508639600646\">series of tweets<\/a> about the attack path, &#8220;a single checkbox is all that separates an app from becoming &#8216;multi-tenant&#8217;.&#8221;<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>And in a subsequent <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/www.wiz.io\/blog\/azure-active-directory-bing-misconfiguration#summary\">blog<\/a>, he described it as a &#8220;textbook example of Shared Responsibility confusion.&#8221;<\/p>\n<p>&#8220;This complicated architecture is not always evident to developers, and the responsibility to validate the end-users&#8217; tokens is unclear,&#8221; Ben-Sasson wrote. &#8220;As a result, configuration and validation mistakes are quite prevalent.&#8221;<\/p>\n<p>In fact, 25 percent of all the multi-tenant apps that the Wiz team scanned were vulnerable to this type of authentication bypass, we&#8217;re told.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" id=\"story_eagle_xsm_sm_md_xmd_lg_xlg\" data-pos=\"mid\" data-raptor=\"eagle\" data-xsm=\",mpu,dmpu,\" data-sm=\",mpu,dmpu,\" data-md=\",mpu,dmpu,\" data-xmd=\",mpu,dmpu,\" data-lg=\",mpu,dmpu,\" data-xlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33ZCmSBTX8NMBcJ49q-Z@RqwAAAIA&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>The team &#8220;spotted several&#8221; misconfigured Microsoft-managed apps, including one called Bing Trivia. The researchers created a new account and were able to log in to Bing Trivia, where they found a Content Management System (CMS), and altered the &#8220;best soundtracks&#8221; search query \u2013 changing the first item, Dune (2021), to the team&#8217;s favorite, Hackers (1995).&nbsp;<\/p>\n<blockquote class=\"twitter-tweet\" readability=\"6.1456953642384\">\n<p lang=\"en\" dir=\"ltr\">I hacked into a <a href=\"https:\/\/twitter.com\/bing?ref_src=twsrc%5Etfw\">@Bing<\/a> CMS that allowed me to alter search results and take over millions of <a href=\"https:\/\/twitter.com\/Office365?ref_src=twsrc%5Etfw\">@Office365<\/a> accounts.How did I do it? Well, it all started with a simple click in <a href=\"https:\/\/twitter.com\/Azure?ref_src=twsrc%5Etfw\">@Azure<\/a>\u2026 ????This is the story of <a href=\"https:\/\/twitter.com\/hashtag\/BingBang?src=hash&amp;ref_src=twsrc%5Etfw\">#BingBang<\/a> ????\u2b07\ufe0f <a href=\"https:\/\/t.co\/9pydWvHhJs\">pic.twitter.com\/9pydWvHhJs<\/a><\/p>\n<p>\u2014 Hillai Ben-Sasson (@hillai) <a href=\"https:\/\/twitter.com\/hillai\/status\/1641146508639600646?ref_src=twsrc%5Etfw\">March 29, 2023<\/a><\/p><\/blockquote>\n<p>The altered result immediately appeared on Bing.<\/p>\n<p>&#8220;This proved that we could control Bing&#8217;s search results, and as we would later confirm, this control extended to Bing&#8217;s homepage content as well,&#8221; Ben-Sasson said.<\/p>\n<p>After changing the search results, the researchers wanted to test whether it was possible to use this security weakness to perform cross-site scripting (XSS) attacks, which would involve miscreants running malicious scripting code in a victim&#8217;s browser by injecting data into a trusted Microsoft webpage. That code could, for instance, potentially access and exfiltrate the victim&#8217;s account, if successfully executed in their browser when they visited a page poisoned by the team.<\/p>\n<p>Wiz noticed Bing&#8217;s &#8220;Work&#8221; section allows users to search their Office 365 (now known as Microsoft 365) data, and that this section was based on the Office 365 API.&nbsp;&#8220;One specific endpoint created JWT tokens for the Office 365 API, so we generated a new XSS payload via this endpoint,&#8221; Ben-Sasson wrote.&nbsp;<\/p>\n<p>In addition to Bing Trivia, Wiz found other internal Microsoft-managed apps with similar misconfigurations.&nbsp;<\/p>\n<p>These included a control panel for the MSN Newsletter called Mag News, an API for Microsoft&#8217;s Central Notification Service, Contact Center, an internal tool called PoliCheck that scans for forbidden words in Microsoft code, a WordPress admin panel that allowed Wiz to publish fake posts to a trusted Microsoft.com domain, and finally Microsoft&#8217;s Cosmos file management system with more than four exabytes of files.<\/p>\n<p>The researchers reported their findings to Microsoft, which issued fixes for all of these applications and awarded Wiz a $40,000 bug bounty. The team says it&#8217;s going to <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/twitter.com\/hillai\/status\/1641146529380433925\">donate<\/a> the prize to a good cause.<\/p>\n<p>&#8220;Microsoft has confirmed that all the actions outlined by the researchers are no longer possible because of these fixes,&#8221; Redmond said in its own <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/msrc.microsoft.com\/blog\/2023\/03\/guidance-on-potential-misconfiguration-of-authorization-of-multi-tenant-applications-that-use-azure-ad\/\">blog<\/a>, adding that its security response team made other changes &#8220;to reduce the risk of future misconfigurations&#8221; by Redmond and its customers. \u00ae<\/p>\n<p> READ MORE <a href=\"https:\/\/go.theregister.com\/feed\/www.theregister.com\/2023\/03\/30\/wiz_bing_takeover\/\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8216;BingBang&#8217; boo-boo affected other internal Microsoft apps, too An Azure Active Directory (AAD) misconfiguration by Microsoft in one of its own cloud-hosted applications could have allowed miscreants to subvert the IT giant&#8217;s Bing search engine \u2013 even changing search results.\u2026 READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[63],"tags":[],"class_list":["post-51293","post","type-post","status-publish","format-standard","hentry","category-the-register"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Azure blunder left Bing results editable, MS 365 accounts potentially exposed 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis 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