{"id":35425,"date":"2025-05-06T09:21:39","date_gmt":"2025-05-06T09:21:39","guid":{"rendered":""},"modified":"2025-06-11T11:53:43","modified_gmt":"2025-06-11T17:53:43","slug":"cve-2023-35970-heap-based-buffer-overflow-vulnerability-in-gtkwave","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-35970-heap-based-buffer-overflow-vulnerability-in-gtkwave\/","title":{"rendered":"<strong>CVE-2023-35970: Heap-Based Buffer Overflow Vulnerability in GTKWave<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the ever-evolving landscape of cybersecurity, a new threat has emerged, identified as CVE-2023-35970. This vulnerability impacts the GTKWave 3.3.115 software package, widely used for viewing electronic timing diagrams. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-22636-cross-site-scripting-vulnerability-in-vr-frases-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"40206\">vulnerability has serious implications as it can potentially<\/a> allow an attacker to execute arbitrary code, leading to system compromise or data leakage. It is crucial for organizations using this package to be aware of this <a href=\"https:\/\/www.ameeba.com\/blog\/building-a-cybersecurity-first-culture-a-crucial-step-for-u-s-manufacturing\/\"  data-wpil-monitor-id=\"45642\">vulnerability<\/a> and take immediate steps to mitigate it.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2023-35970<br \/>\nSeverity: High &#8211; CVSS 7.8<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3928-unspecified-vulnerability-in-commvault-web-server-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"40370\">System compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3023589212\" 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: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\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: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\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: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p>GTKWave | 3.3.115<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3786-critical-buffer-overflow-vulnerability-in-tenda-ac15\/\"  data-wpil-monitor-id=\"40287\">vulnerability lies in the heap-based buffer overflow<\/a> within the fstReaderIterBlocks2 chain_table parsing functionality of GTKWave. An attacker can craft a malicious .fst file, which when opened by the victim, can lead to arbitrary <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43946-critical-remote-code-execution-vulnerability-in-tcpwave-ddi\/\"  data-wpil-monitor-id=\"40338\">code execution<\/a>. The issue arises from the chain_table of the `FST_BL_VCDATA_DYN_ALIAS2` section type, where a failure to properly validate and handle the malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3065-arbitrary-file-deletion-vulnerability-in-database-toolset-plugin\/\"  data-wpil-monitor-id=\"40235\">file can trigger these vulnerabilities<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-877422982\" 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-2025-46264-critical-unrestricted-file-upload-vulnerability-in-powerpress-podcasting\/\"  data-wpil-monitor-id=\"40279\">vulnerability might be exploited using a maliciously crafted .fst file:<\/a><\/p>\n<pre><code class=\"\" data-line=\"\">#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\nint main() {\nFILE *file;\nfile = fopen(&quot;malicious.fst&quot;, &quot;w&quot;);\nif (file == NULL) {\nprintf(&quot;Error opening file\\n&quot;);\nreturn 1;\n}\n\/\/ Write data that exploits the buffer overflow vulnerability\nfprintf(file, &quot;malicious_payload&quot;);\nfclose(file);\nreturn 0;\n}<\/code><\/pre>\n<p>This example demonstrates how an attacker might create a malicious .fst file. When this file is opened by GTKWave, it exploits the buffer overflow vulnerability, potentially leading to arbitrary <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-13808-remote-code-execution-vulnerability-in-xpro-elementor-addons-pro-wordpress-plugin\/\"  data-wpil-monitor-id=\"40361\">code execution<\/a>.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>To mitigate this vulnerability, it is recommended to apply the vendor patch as soon as it becomes available. Until then, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation, helping to detect and prevent any attempted <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47154-exploitation-of-use-after-free-vulnerability-in-libjs-in-ladybird\/\"  data-wpil-monitor-id=\"45643\">exploitation of this vulnerability<\/a>. Additionally, organizations should enforce a strong <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-1763-cross-site-scripting-and-content-security-policy-bypass-in-gitlab-ee\/\"  data-wpil-monitor-id=\"57351\">security policy<\/a> that includes not opening files from untrusted sources.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the ever-evolving landscape of cybersecurity, a new threat has emerged, identified as CVE-2023-35970. This vulnerability impacts the GTKWave 3.3.115 software package, widely used for viewing electronic timing diagrams. This vulnerability has serious implications as it can potentially allow an attacker to execute arbitrary code, leading to system compromise or data leakage. It is [&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-35425","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\/35425","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=35425"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/35425\/revisions"}],"predecessor-version":[{"id":51179,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/35425\/revisions\/51179"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=35425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=35425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=35425"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=35425"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=35425"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=35425"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=35425"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=35425"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=35425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}