{"id":141,"date":"2022-10-12T13:51:00","date_gmt":"2022-10-12T13:51:00","guid":{"rendered":"https:\/\/nobugescapes.com\/?p=141"},"modified":"2023-05-23T11:51:10","modified_gmt":"2023-05-23T11:51:10","slug":"creating-a-new-user-with-admin-privilege","status":"publish","type":"post","link":"https:\/\/nobugescapes.com\/blog\/creating-a-new-user-with-admin-privilege\/","title":{"rendered":"Creating a new user with admin Privilege"},"content":{"rendered":"\n<p>CVE-2023-31923<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Product &amp; Service Introduction:<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.supremainc.com\/en\/platform\/hybrid-security-platform-biostar-2.asp\">BioStar <\/a>2 is a web-based, open, and integrated security platform that provides comprehensive functionality for access control, time &amp; attendance management, visitor management, and video log maintenance. It encrypts all personal data available and supports both SDKs and web APIs to integrate BioStar 2 with third-party software. In addition, users can control BioStar 2 platform remotely with the mobile app for BioStar 2 and manage a mobile access card that they can use to access sites.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Technical Description:<\/h3>\n\n\n\n<p>On Bio star 2 web application there are 7 different Operator levels, each rule has a different privilege where the \u201c<strong>Administrator<\/strong>\u201d has full permission to do everything on the web application while the <strong>\u201cUser Operator\u201d<\/strong> has limited privileges. But due to missing server-side validation, I identified a way to create a highly privileged user. An attacker should be authenticated to the target website and logged in as a \u201cUser Operator\u201d to exploit this vulnerability.<\/p>\n\n\n\n<p>The security risk of the vulnerability is High with a CVSS (common vulnerability scoring system) count of 8.8<br><br>Successful exploitation of the vulnerability results in gaining admin privilege giving the attacker the ability to control the entire system such as <\/p>\n\n\n\n<ul>\n<li>Delete, Modify and add any user<\/li>\n\n\n\n<li>Delete, Modify and add any door<\/li>\n\n\n\n<li>Access to all user&#8217;s information from the Active directory if the system was integrated with the AD and much more.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Proof of Concept (POC):<\/h3>\n\n\n\n<ul>\n<li>From the dashboard click on \u201cAdd user\u201d<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"494\" src=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/47C61A0FA8738BA77308A8A600F88E4B-1024x494.png\" alt=\"\" class=\"wp-image-144\" srcset=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/47C61A0FA8738BA77308A8A600F88E4B-1024x494.png 1024w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/47C61A0FA8738BA77308A8A600F88E4B-300x145.png 300w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/47C61A0FA8738BA77308A8A600F88E4B-768x371.png 768w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/47C61A0FA8738BA77308A8A600F88E4B.png 1038w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">System dashboard<\/figcaption><\/figure>\n\n\n\n<ul>\n<li>Noticed the user\u2019s level \u201cUser Operator\u201d can\u2019t create admin account<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"444\" src=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/31d6cfe0d16ae931b73c59d7e0c089c0-1024x444.png\" alt=\"\" class=\"wp-image-146\" srcset=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/31d6cfe0d16ae931b73c59d7e0c089c0-1024x444.png 1024w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/31d6cfe0d16ae931b73c59d7e0c089c0-300x130.png 300w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/31d6cfe0d16ae931b73c59d7e0c089c0-768x333.png 768w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/31d6cfe0d16ae931b73c59d7e0c089c0.png 1430w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Operator level<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"429\" height=\"448\" src=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/032f75b3ca02a393196a818328bd32e8-1.png\" alt=\"\" class=\"wp-image-148\" srcset=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/032f75b3ca02a393196a818328bd32e8-1.png 429w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/032f75b3ca02a393196a818328bd32e8-1-287x300.png 287w\" sizes=\"(max-width: 429px) 100vw, 429px\" \/><figcaption class=\"wp-element-caption\"><em>Original PUT request when adding new user<\/em><\/figcaption><\/figure>\n\n\n\n<ul>\n<li>Using a proxy interceptor modify the value of the \u201cid\u201d parameter from 255 to 1 to change the user rule<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/b469f8beeee7c831206bd577f9f2630d9177979203a9489e47e04df4e6deaa0f8e0c0.png\" alt=\"\" class=\"wp-image-149\" width=\"599\" height=\"324\" srcset=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/b469f8beeee7c831206bd577f9f2630d9177979203a9489e47e04df4e6deaa0f8e0c0.png 780w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/b469f8beeee7c831206bd577f9f2630d9177979203a9489e47e04df4e6deaa0f8e0c0-300x162.png 300w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/b469f8beeee7c831206bd577f9f2630d9177979203a9489e47e04df4e6deaa0f8e0c0-768x416.png 768w\" sizes=\"(max-width: 599px) 100vw, 599px\" \/><figcaption class=\"wp-element-caption\"><em>Modified PUT request, the value has been changed from 255 to 1<\/em><\/figcaption><\/figure>\n\n\n\n<ul>\n<li>Login to the new account <\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"416\" src=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/02ba4c4e5f8ecd1877fc52d64d3-1024x416.png\" alt=\"\" class=\"wp-image-154\" srcset=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/02ba4c4e5f8ecd1877fc52d64d3-1024x416.png 1024w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/02ba4c4e5f8ecd1877fc52d64d3-300x122.png 300w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/02ba4c4e5f8ecd1877fc52d64d3-768x312.png 768w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/02ba4c4e5f8ecd1877fc52d64d3.png 1254w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>New admin account has been created on Bio star 2<\/em><\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Exploit using python:<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"780\" height=\"392\" src=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/6b4e03423667dbb73b6e15454f0eb1abd45.png\" alt=\"\" class=\"wp-image-155\" srcset=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/6b4e03423667dbb73b6e15454f0eb1abd45.png 780w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/6b4e03423667dbb73b6e15454f0eb1abd45-300x151.png 300w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/6b4e03423667dbb73b6e15454f0eb1abd45-768x386.png 768w\" sizes=\"(max-width: 780px) 100vw, 780px\" \/><figcaption class=\"wp-element-caption\"><em>Python script, that takes user token to generate a new admin account, by sending a PUT request.<\/em><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"780\" height=\"288\" src=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/a69f73cca23a9ac5c8b567dc18.png\" alt=\"\" class=\"wp-image-156\" srcset=\"https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/a69f73cca23a9ac5c8b567dc18.png 780w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/a69f73cca23a9ac5c8b567dc18-300x111.png 300w, https:\/\/nobugescapes.com\/wp-content\/uploads\/2022\/09\/a69f73cca23a9ac5c8b567dc18-768x284.png 768w\" sizes=\"(max-width: 780px) 100vw, 780px\" \/><figcaption class=\"wp-element-caption\"><em>Running the script.<\/em><\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Solution &#8211; Fix &amp; Patch:<\/h3>\n\n\n\n<p>Suprema recommend using the latest version of Bio star 2, at the time of publishing the blog | 2022 Q4, v2.9.1. <\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE-2023-31923 Product &amp; Service Introduction: BioStar 2 is a web-based, open, and integrated security platform that provides comprehensive functionality for access control, time &amp; attendance management, visitor management, and video log maintenance. It encrypts all personal data available and supports both SDKs and web APIs to integrate BioStar 2 with third-party software. In addition, users [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[9],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Creating a new user with admin Privilege -<\/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:\/\/nobugescapes.com\/blog\/creating-a-new-user-with-admin-privilege\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Creating a new user with admin Privilege -\" \/>\n<meta property=\"og:description\" content=\"CVE-2023-31923 Product &amp; Service Introduction: BioStar 2 is a web-based, open, and integrated security platform that provides comprehensive functionality for access control, time &amp; attendance management, visitor management, and video log maintenance. 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