{"id":57603,"date":"2024-11-04T16:07:04","date_gmt":"2024-11-04T16:07:04","guid":{"rendered":"https:\/\/packetstormsecurity.com\/news\/view\/36553\/Why-The-Long-Name-Okta-Discloses-Auth-Bypass-Bug-Affecting-52-Character-Usernames.html"},"modified":"2024-11-04T16:07:04","modified_gmt":"2024-11-04T16:07:04","slug":"why-the-long-name-okta-discloses-auth-bypass-bug-affecting-52-character-usernames","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/why-the-long-name-okta-discloses-auth-bypass-bug-affecting-52-character-usernames\/","title":{"rendered":"Why The Long Name? Okta Discloses Auth Bypass Bug Affecting 52-Character Usernames"},"content":{"rendered":"<p>In potentially bad news for those with long names and\/or employers with verbose domain names, Okta spotted a security hole that could have allowed crims to pass Okta AD\/LDAP Delegated Authentication (DelAuth) using only a username.<\/p>\n<p>But why is that bad news for those with long usernames? Well, it&#8217;s because the bug could be exploited only when a series of conditions were met, one of which being a username that was 52 characters or longer.<\/p>\n<p>That condition is arguably the most unusual out of them all, although not entirely out of the realm of possibility if a user&#8217;s work email address is used as a username, for example.<\/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=2ZynHyYlS8HM4nGsYEjaS0gAAAMw&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=2ZynHyYlS8HM4nGsYEjaS0gAAAMw&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>The exploit would also only work when the targeted account already had a successful login attempt stored, including the associated cache key generated by the bcrypt algorithm. Okta said that key would comprise a hashed string of a user&#8217;s userId, username, and password.<\/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=44ZynHyYlS8HM4nGsYEjaS0gAAAMw&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=44ZynHyYlS8HM4nGsYEjaS0gAAAMw&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=33ZynHyYlS8HM4nGsYEjaS0gAAAMw&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=33ZynHyYlS8HM4nGsYEjaS0gAAAMw&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<\/p><\/div>\n<p>That cache would also have to be used first, which Okta said in its advisory &#8220;can occur if the AD\/LDAP agent was down or cannot be reached, for example, due to high network traffic.&#8221; And yet another caveat was that multi-factor authentication (MFA) would also have to be disabled\/never implemented for the bug to be active.<\/p>\n<p>Okta discovered the issue on October 30 and fixed it the same day, although by that point it had been lingering for just over three months.&nbsp;<\/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=44ZynHyYlS8HM4nGsYEjaS0gAAAMw&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=44ZynHyYlS8HM4nGsYEjaS0gAAAMw&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>The security company advised customers to check their logs for any authentication attempts using 52 or more-character usernames all the way back to July 23. It didn&#8217;t mention whether or not it was aware of any successful exploitation attempts.<\/p>\n<p>&#8220;Furthermore, Okta recommends all Okta customers implement <a href=\"https:\/\/www.theregister.com\/2024\/09\/03\/uk_trio_pleads_guilty_mfa_bypass\/\">MFA<\/a> at a minimum,&#8221; the company added. &#8220;We also strongly encourage customers to enroll users in phishing-resistant authenticators (such as Okta Verify FastPass, FIDO2 WebAuthn, or PIV\/CAC Smart Cards) and to enforce <a href=\"https:\/\/www.theregister.com\/2024\/10\/30\/russia_wrangles_rdp_files_in\/\">phishing<\/a> resistance for access to all applications.&#8221;<\/p>\n<p>Weighing in, Brave security engineer Yan Zhu <a href=\"https:\/\/x.com\/bcrypt\/status\/1852575080989257893?s=51&amp;t=lrK2ZKecQGyknpvtZGsKdQ\" rel=\"nofollow\">said<\/a> that due to the bcrypt algorithm ignoring input after a specific length, if bcrypt is used to hash a username and password pair, then a sufficiently long username will mean any <a href=\"https:\/\/www.theregister.com\/2024\/04\/29\/uk_lays_password_legislation\/\">password<\/a> is accepted.<\/p>\n<p>Passing the input through the SHA-256 algorithm can mitigate this, she said. \u00ae<\/p>\n<p> READ MORE <a href=\"https:\/\/packetstormsecurity.com\/news\/view\/36553\/Why-The-Long-Name-Okta-Discloses-Auth-Bypass-Bug-Affecting-52-Character-Usernames.html\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>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":[60],"tags":[11102],"class_list":["post-57603","post","type-post","status-publish","format-standard","hentry","category-packet-storm","tag-headlineflawpasswordidentity-theft"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why The Long Name? 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