{"id":59329,"date":"2025-07-12T13:46:09","date_gmt":"2025-07-12T13:46:09","guid":{"rendered":""},"modified":"2025-09-03T03:47:33","modified_gmt":"2025-09-03T09:47:33","slug":"cve-2025-3931-yggdrasil-s-flaw-opens-door-to-local-privilege-escalation-and-system-compromise","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-3931-yggdrasil-s-flaw-opens-door-to-local-privilege-escalation-and-system-compromise\/","title":{"rendered":"<strong>CVE-2025-3931: Yggdrasil&#8217;s Flaw Opens Door to Local Privilege Escalation and System Compromise<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-3931 is a serious vulnerability found in Yggdrasil, a system broker that allows processes to communicate with other &#8220;worker&#8221; processes via the DBus component. This flaw in Yggdrasil&#8217;s DBus method can create a substantial risk for systems that utilize its capabilities. Given its widespread use in system processes, it could potentially affect a significant number of users. A successful exploit of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8060-critical-vulnerability-in-tenda-ac23-leading-to-stack-based-buffer-overflow\/\"  data-wpil-monitor-id=\"67924\">vulnerability can lead<\/a> to local privilege escalation and give an attacker the ability to install arbitrary RPM packages, which could, in turn, lead to system compromise and data leakage.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-3931<br \/>\nSeverity: High (7.8 CVSS Score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: Local privilege escalation leading to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45346-sql-injection-vulnerability-in-bacula-web-resulting-in-potential-system-compromise\/\"  data-wpil-monitor-id=\"67925\">potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2959055769\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>Yggdrasil | All <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55010-arbitrary-php-object-instantiation-in-kanboard-prior-to-version-1-2-47\/\"  data-wpil-monitor-id=\"77983\">versions prior<\/a> to patched release<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The flaw lies within Yggdrasil&#8217;s DBus method that dispatches messages to worker processes. The method lacks necessary authentication and authorization checks, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53024-high-risk-oracle-vm-virtualbox-vulnerability-allows-system-takeover\/\"  data-wpil-monitor-id=\"70770\">allowing any system<\/a> user to call it. An attacker with <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49672-buffer-overflow-vulnerability-in-windows-routing-and-remote-access-service\/\"  data-wpil-monitor-id=\"67926\">access to the system can exploit this vulnerability<\/a> by sending a dispatch message to the Yggdrasil worker process which acts as a package manager. This can force Yggdrasil to install arbitrary RPM packages, leading to local <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7695-privilege-escalation-vulnerability-in-dataverse-integration-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"69198\">privilege escalation<\/a>. The attacker can then <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50060-critical-data-access-vulnerability-in-oracle-bi-publisher\/\"  data-wpil-monitor-id=\"70771\">access and modify sensitive system data<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4137575237\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>This is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7097-critical-command-injection-vulnerability-in-comodo-internet-security-premium\/\"  data-wpil-monitor-id=\"69200\">vulnerability might be exploited using a shell command:<\/a><\/p>\n<pre><code class=\"\" data-line=\"\">dbus-send --system --dest=com.example.Yggdrasil --type=method_call \\\n\/com\/example\/Yggdrasil com.example.Yggdrasil.InstallPackage \\\nstring:&quot;malicious_package.rpm&quot;<\/code><\/pre>\n<p>In this example, the `dbus-send` command is used to send a method call to the Yggdrasil service. The `InstallPackage` method is invoked with the name of an arbitrary RPM package, `malicious_package.rpm`, as an argument.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Users are advised to apply the vendor&#8217;s patch as soon as it becomes available. In the meantime, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as temporary mitigation. Proper authorization and authentication checks should be implemented on the Yggdrasil DBus method to prevent <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5835-droip-plugin-for-wordpress-unauthorized-access-and-modification-vulnerability\/\"  data-wpil-monitor-id=\"69199\">unauthorized access<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-3931 is a serious vulnerability found in Yggdrasil, a system broker that allows processes to communicate with other &#8220;worker&#8221; processes via the DBus component. This flaw in Yggdrasil&#8217;s DBus method can create a substantial risk for systems that utilize its capabilities. Given its widespread use in system processes, it could potentially affect a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-59329","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-privilege-escalation"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59329","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=59329"}],"version-history":[{"count":4,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59329\/revisions"}],"predecessor-version":[{"id":70370,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59329\/revisions\/70370"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59329"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59329"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59329"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59329"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59329"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59329"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59329"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59329"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59329"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}