{"id":63636,"date":"2025-08-09T16:35:10","date_gmt":"2025-08-09T16:35:10","guid":{"rendered":""},"modified":"2025-09-27T15:20:27","modified_gmt":"2025-09-27T21:20:27","slug":"cve-2025-43588-out-of-bounds-write-vulnerability-in-substance3d-sampler-versions-5-0-and-earlier","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-43588-out-of-bounds-write-vulnerability-in-substance3d-sampler-versions-5-0-and-earlier\/","title":{"rendered":"<strong>CVE-2025-43588: Out-of-Bounds Write Vulnerability in Substance3D &#8211; Sampler Versions 5.0 and Earlier<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In this blog post, we delve into the details of a serious cybersecurity vulnerability (CVE-2025-43588) that affects Substance3D &#8211; Sampler versions 5.0 and earlier. This vulnerability is an out-of-bounds write flaw that could allow an attacker to execute arbitrary code in the context of the current user. This vulnerability is of significant concern due to its <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8040-memory-safety-bugs-causing-potential-system-compromise-in-firefox-and-thunderbird\/\"  data-wpil-monitor-id=\"71253\">potential to compromise entire systems<\/a> or lead to data leakage. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44955-critical-vulnerability-in-ruckus-network-director-allows-jail-users-to-gain-root-access\/\"  data-wpil-monitor-id=\"76073\">vulnerability requires user<\/a> interaction, as victims are required to open a malicious file for the exploit to take place.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-43588<br \/>\nSeverity: High (7.8 CVSS score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: Arbitrary <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50460-remote-code-execution-vulnerability-in-ms-swift-project\/\"  data-wpil-monitor-id=\"71448\">code execution<\/a>, potential system compromise, and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1534480436\" 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-2025-47108-out-of-bounds-write-vulnerability-in-substance3d-painter-versions-11-0-1-and-earlier\/\"  data-wpil-monitor-id=\"81979\">Substance3D &#8211; Sampler | Versions<\/a> 5.0 and earlier<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47753-high-risk-out-of-bounds-read-vulnerability-in-v-sft-v6-2-5-0-and-earlier\/\"  data-wpil-monitor-id=\"73031\">vulnerability resides in an out-of-bounds<\/a> write error within the Substance3D &#8211; Sampler. This error allows an attacker to write data past the end of an allocated buffer. This can result in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21486-severe-memory-corruption-vulnerability-during-dynamic-process-creation\/\"  data-wpil-monitor-id=\"71514\">corruption of relevant memory<\/a> and potentially allow an attacker to execute arbitrary code. However, exploiting this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5821-critical-authentication-bypass-vulnerability-in-case-theme-user-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"83322\">vulnerability requires user<\/a> interaction, specifically, the user must open a malicious file crafted by the attacker.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3946683331\" 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 the actual code exploiting this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42959-unauthenticated-replay-attack-exploiting-hmac-reuse\/\"  data-wpil-monitor-id=\"71297\">vulnerability would depend on the specific implementation of Substance3D<\/a> &#8211; Sampler and the attacker&#8217;s goals, a conceptual example of the exploit could look like this:<\/p>\n<pre><code class=\"\" data-line=\"\"># Attacker crafts a malicious file with the overflowing data\necho &#039;malicious_payload&#039; &gt; exploit.sbs\n# The user, unaware of the malicious intent, opens the file with Substance3D - Sampler\nSubstance3D-Sampler exploit.sbs<\/code><\/pre>\n<p>In this scenario, &#8216;malicious_payload&#8217; would be designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7206-critical-stack-based-buffer-overflow-vulnerability-in-d-link-dir-825-2-10\/\"  data-wpil-monitor-id=\"71109\">overflow the buffer<\/a> and execute arbitrary code, potentially giving the attacker control over the user&#8217;s system.<\/p>\n<p><strong>Mitigation and Prevention<\/strong><\/p>\n<p>Users can mitigate the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54689-high-risk-php-remote-file-inclusion-vulnerability-in-urna\/\"  data-wpil-monitor-id=\"76652\">risk of this vulnerability<\/a> by applying the vendor patch as soon as it is available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection Systems (IDS) can serve as temporary mitigation. It&#8217;s also recommended to avoid <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58158-harness-open-source-git-lfs-server-vulnerability\/\"  data-wpil-monitor-id=\"85515\">opening files from untrusted sources<\/a> to reduce the risk of falling victim to such an exploit.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In this blog post, we delve into the details of a serious cybersecurity vulnerability (CVE-2025-43588) that affects Substance3D &#8211; Sampler versions 5.0 and earlier. This vulnerability is an out-of-bounds write flaw that could allow an attacker to execute arbitrary code in the context of the current user. This vulnerability is of significant concern due [&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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-63636","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/63636","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=63636"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/63636\/revisions"}],"predecessor-version":[{"id":78311,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/63636\/revisions\/78311"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=63636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=63636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=63636"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=63636"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=63636"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=63636"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=63636"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=63636"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=63636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}