{"id":58806,"date":"2025-07-10T03:21:01","date_gmt":"2025-07-10T03:21:01","guid":{"rendered":""},"modified":"2025-09-27T15:20:29","modified_gmt":"2025-09-27T21:20:29","slug":"cve-2025-43571-use-after-free-vulnerability-in-substance3d-stager-leading-to-arbitrary-code-execution","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-43571-use-after-free-vulnerability-in-substance3d-stager-leading-to-arbitrary-code-execution\/","title":{"rendered":"<strong>CVE-2025-43571: Use After Free Vulnerability in Substance3D &#8211; Stager Leading to Arbitrary Code Execution<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the realm of cybersecurity, one of the most pressing concerns is the vulnerability of systems to attacks. One such vulnerability, identified as CVE-2025-43571, affects Substance3D &#8211; Stager versions 3.1.1 and earlier. This Use After Free <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52717-sql-injection-vulnerability-in-lifterlms-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"65376\">vulnerability can potentially lead<\/a> to arbitrary code execution in the context of the current user. This means that an attacker could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5310-remote-code-execution-vulnerability-in-dover-fueling-solutions-progauge-maglink-lx-consoles\/\"  data-wpil-monitor-id=\"65509\">execute malicious code<\/a> and potentially gain control of the user&#8217;s system.<br \/>\nThis <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50738-memos-application-vulnerability-allows-for-unauthorized-user-information-disclosure\/\"  data-wpil-monitor-id=\"73465\">vulnerability is particularly concerning because it requires user<\/a> interaction. A victim must open a malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53260-unrestricted-file-upload-vulnerability-in-getredhawkstudio-file-manager-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"65370\">file for the vulnerability<\/a> to be exploited, making it a prime vector for phishing or social engineering attacks. As such, it&#8217;s crucial to understand the nature of this vulnerability, how it can be exploited, and what steps can be taken to mitigate its risks.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-43571<br \/>\nSeverity: High (7.8 CVSS score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: User<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6755-wordpress-plugin-vulnerability-leads-to-arbitrary-file-deletion\/\"  data-wpil-monitor-id=\"65611\">Arbitrary code execution potentially leading<\/a> to system compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2568203082\" 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-2025-43568-use-after-free-vulnerability-in-substance3d-stager-resulting-in-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"91546\">Substance3D &#8211; Stager<\/a> | 3.1.1 and earlier<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit hinges on a Use After Free <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=\"73464\">vulnerability in Substance3D<\/a> &#8211; Stager. A Use After Free situation occurs when a piece of memory is freed (or deleted) but continues to be used, leading to a state where an attacker can manipulate this memory to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26074-remote-code-execution-vulnerability-in-orkes-conductor-v3-21-11\/\"  data-wpil-monitor-id=\"66009\">execute arbitrary code<\/a>.<br \/>\nIn the case of CVE-2025-43571, the malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49688-double-free-vulnerability-in-windows-rras-opens-door-for-unauthorized-code-execution\/\"  data-wpil-monitor-id=\"67722\">code execution is triggered when a user opens<\/a> a malicious file. This action allows the attacker to make use of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28993-code-injection-vulnerability-in-jose-content-no-cache\/\"  data-wpil-monitor-id=\"65451\">vulnerability and execute their code<\/a> in the victim&#8217;s system context.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-271710720\" 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>A conceptual example of how this vulnerability might be exploited could look like this:<\/p>\n<pre><code class=\"\" data-line=\"\"># Pseudo code for a malicious file exploiting CVE-2025-43571\nclass MaliciousFile:\ndef __init__(self):\nself.payload = &quot;arbitrary code here&quot;\ndef execute_payload(self, target):\ntarget.memory.free_space = self.payload\ntarget.execute(target.memory.free_space)\nmalicious_file = MaliciousFile()\nmalicious_file.execute_payload(target_system)<\/code><\/pre>\n<p>Please note, this is a simplified and conceptual example and is not meant to represent an actual exploit code.<\/p>\n<p><strong>Mitigation Measures<\/strong><\/p>\n<p>Users of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47108-out-of-bounds-write-vulnerability-in-substance3d-painter-versions-11-0-1-and-earlier\/\"  data-wpil-monitor-id=\"81982\">Substance3D &#8211; Stager versions<\/a> 3.1.1 and earlier should apply the vendor patch as soon as it is available. In the meantime, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as temporary mitigation to detect and block malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54444-unrestricted-file-upload-leading-to-code-injection-in-samsung-electronics-magicinfo-9-server\/\"  data-wpil-monitor-id=\"67242\">files that may contain the exploit code<\/a>. In addition, users should be vigilant against <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58158-harness-open-source-git-lfs-server-vulnerability\/\"  data-wpil-monitor-id=\"85520\">opening files from untrusted sources<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the realm of cybersecurity, one of the most pressing concerns is the vulnerability of systems to attacks. One such vulnerability, identified as CVE-2025-43571, affects Substance3D &#8211; Stager versions 3.1.1 and earlier. This Use After Free vulnerability can potentially lead to arbitrary code execution in the context of the current user. This means that [&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-58806","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\/58806","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=58806"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58806\/revisions"}],"predecessor-version":[{"id":84709,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58806\/revisions\/84709"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=58806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=58806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=58806"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=58806"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=58806"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=58806"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=58806"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=58806"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=58806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}