{"id":58668,"date":"2025-07-09T21:18:04","date_gmt":"2025-07-09T21:18:04","guid":{"rendered":""},"modified":"2025-10-26T04:20:14","modified_gmt":"2025-10-26T10:20:14","slug":"cve-2025-43549-use-after-free-vulnerability-in-substance3d-stager","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-43549-use-after-free-vulnerability-in-substance3d-stager\/","title":{"rendered":"<strong>CVE-2025-43549: Use After Free Vulnerability in Substance3D Stager<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability has been identified in Substance3D &#8211; Stager, versions 3.1.1 and earlier, which could potentially lead to a complete system compromise or data leakage. This vulnerability, designated as CVE-2025-43549, has received a CVSS severity score of 7.8, pointing towards a high-risk situation. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55157-vim-text-editor-use-after-free-vulnerability-resulting-in-memory-corruption\/\"  data-wpil-monitor-id=\"74987\">vulnerability is of significant concern as it can result<\/a> in arbitrary code execution, provided the user interacts by opening a malicious file. Given the potential impact, it is crucial for all users and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52717-sql-injection-vulnerability-in-lifterlms-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"68188\">system<\/a> administrators to understand the nature of this vulnerability and take appropriate measures to protect their systems.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-43549<br \/>\nSeverity: High (CVSS: 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52817-authorization-bypass-in-zealousweb-abandoned-contact-form-7-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"68187\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-823978195\" 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><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43571-use-after-free-vulnerability-in-substance3d-stager-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"91535\">Substance3D &#8211; Stager<\/a> | 3.1.1 and earlier<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30419-memory-corruption-vulnerability-in-ni-circuit-design-suite\/\"  data-wpil-monitor-id=\"68185\">vulnerability resides in the way Substance3D &#8211; Stager handles memory<\/a> allocation for certain processes. A Use After Free condition occurs when the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42976-memory-corruption-and-information-disclosure-in-sap-netweaver-application-server-abap\/\"  data-wpil-monitor-id=\"74399\">application continues to use memory<\/a> after it has been freed. This can lead to a variety of outcomes, including program crashes, incorrect computations, and in some cases, the execution of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25214-race-condition-vulnerability-in-wwbn-avideo-14-4-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"68186\">arbitrary code<\/a>. In this instance, an attacker can craft a malicious file that, when opened by a victim, triggers a Use After Free condition, subsequently <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47168-use-after-free-vulnerability-in-microsoft-office-word-allowing-unauthorized-code-execution\/\"  data-wpil-monitor-id=\"73154\">allowing the attacker to execute arbitrary code<\/a> in the context of the victim&#8217;s user session.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3369311764\" 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>While exact exploitation methods are often kept confidential to prevent misuse, a conceptual example will help conceptualize how the vulnerability might be exploited. Here&#8217;s a high-level pseudocode representation of how the exploit might occur:<\/p>\n<pre><code class=\"\" data-line=\"\"># Pseudocode for CVE-2025-43549 exploit\n# Step 1: Allocate memory\nmemory = allocate_memory()\n# Step 2: Free the memory\nfree_memory(memory)\n# Step 3: Craft malicious payload\nmalicious_payload = craft_payload()\n# Step 4: Use the freed memory\nuse_memory(memory, malicious_payload)\n# Step 5: Execute payload\nexecute_payload(malicious_payload)<\/code><\/pre>\n<p>Please note that this is a simplified representation and actual exploitation would require in-depth understanding of the software&#8217;s internals and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55158-critical-memory-management-vulnerability-in-vim-text-editor\/\"  data-wpil-monitor-id=\"78874\">memory management<\/a> mechanisms. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49526-out-of-bounds-write-vulnerability-in-illustrator-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"75201\">code is meant to illustrate<\/a> the general process and is not intended for practical use.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Users and system administrators are advised to update to the latest <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43588-out-of-bounds-write-vulnerability-in-substance3d-sampler-versions-5-0-and-earlier\/\"  data-wpil-monitor-id=\"73469\">version of Substance3D<\/a> &#8211; Stager as soon as possible. If immediate patching is not possible, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. Regularly update your security tools, and always be cautious before <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58158-harness-open-source-git-lfs-server-vulnerability\/\"  data-wpil-monitor-id=\"85521\">opening files from unknown or untrusted sources<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability has been identified in Substance3D &#8211; Stager, versions 3.1.1 and earlier, which could potentially lead to a complete system compromise or data leakage. This vulnerability, designated as CVE-2025-43549, has received a CVSS severity score of 7.8, pointing towards a high-risk situation. This vulnerability is of significant concern as it can result [&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":[80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-58668","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58668","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=58668"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58668\/revisions"}],"predecessor-version":[{"id":84677,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58668\/revisions\/84677"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=58668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=58668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=58668"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=58668"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=58668"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=58668"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=58668"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=58668"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=58668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}