{"id":37224,"date":"2025-05-11T19:14:25","date_gmt":"2025-05-11T19:14:25","guid":{"rendered":""},"modified":"2025-08-30T04:38:58","modified_gmt":"2025-08-30T10:38:58","slug":"cve-2023-39316-integer-overflow-in-gtkwave-s-lxt2-num-dict-entries-functionality","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-39316-integer-overflow-in-gtkwave-s-lxt2-num-dict-entries-functionality\/","title":{"rendered":"<strong>CVE-2023-39316: Integer Overflow in GTKWave&#8217;s LXT2 num_dict_entries Functionality<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerabilities and Exposures (CVE) system has recently documented a critical security vulnerability, identified as CVE-2023-39316, affecting the GTKWave software version 3.3.115. This vulnerability is related to multiple integer overflow issues existing in the LXT2 num_dict_entries functionality of the software. GTKWave is a fully featured GTK+ based wave viewer that has a wide user base, including system developers and administrators.<br \/>\nThe vulnerability is of significant importance due to its potential to allow an attacker to execute arbitrary code, which could compromise the entire <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24351-remote-logging-vulnerability-in-ctrlx-os-can-lead-to-root-level-system-compromise\/\"  data-wpil-monitor-id=\"42195\">system or lead<\/a> to data leakage. The successful exploitation of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-1304-unauthorized-file-upload-vulnerability-in-newsblogger-wordpress-theme\/\"  data-wpil-monitor-id=\"42422\">vulnerability requires a user to open a malicious .lxt2 file<\/a> that triggers these vulnerabilities.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2023-39316<br \/>\nSeverity: High (7.8)<br \/>\nAttack Vector: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2158-local-file-inclusion-vulnerability-in-wordpress-review-plugin\/\"  data-wpil-monitor-id=\"45564\">Local File<\/a><br \/>\nPrivileges Required: User level<br \/>\nUser Interaction: Required<br \/>\nImpact: Potential system compromise, data leakage, and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35996-arbitrary-code-execution-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"42052\">arbitrary code execution<\/a><\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3433925340\" 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 vulnerability stems from an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35969-critical-heap-based-buffer-overflow-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"41918\">integer overflow<\/a> in the allocation of the `string_pointers` array within the LXT2 num_dict_entries functionality of GTKWave. An attacker can craft a malicious .lxt2 file with specific properties that, when opened by the GTKWave software, causes an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35989-integer-overflow-vulnerability-in-gtkwave-s-lxt2-zlib-block-allocation\/\"  data-wpil-monitor-id=\"41924\">integer overflow<\/a>. This overflow can then <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35995-gtkwave-array-index-validation-vulnerability-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"42035\">lead to arbitrary code<\/a> execution, as insufficient bounds checking allows the attacker to write and execute malicious code in memory locations that should be inaccessible.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1619066144\" 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>The following pseudocode conceptually <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=\"75221\">illustrates the exploitation of this vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\nint main() {\n\/\/ Create a malicious .lxt2 file\nFILE *file;\nfile = fopen(&quot;malicious.lxt2&quot;, &quot;w&quot;);\n\/\/ Write malicious data that triggers integer overflow in the string_pointers array\nfor (int i=0; i&lt;MAX_INT; i++) {\nfwrite(&quot;\\x00\\x00\\x00\\x00&quot;, 4, 1, file);\n}\n\/\/ Close the file\nfclose(file);\nreturn 0;\n}<\/code><\/pre>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Users of GTKWave 3.3.115 are encouraged to apply the vendor-supplied patch as soon as it is available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help detect and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49155-uncontrolled-search-path-vulnerability-in-trend-micro-apex-one-data-loss-prevention-module\/\"  data-wpil-monitor-id=\"75222\">prevent the successful exploitation of this vulnerability<\/a>. Regularly updating all software and maintaining a robust cyber hygiene <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3708-sql-injection-vulnerability-in-le-show-medical-practice-management-system\/\"  data-wpil-monitor-id=\"42760\">practice can also minimize the risk of similar vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerabilities and Exposures (CVE) system has recently documented a critical security vulnerability, identified as CVE-2023-39316, affecting the GTKWave software version 3.3.115. This vulnerability is related to multiple integer overflow issues existing in the LXT2 num_dict_entries functionality of the software. GTKWave is a fully featured GTK+ based wave viewer that has a wide [&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-37224","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\/37224","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=37224"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37224\/revisions"}],"predecessor-version":[{"id":67813,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37224\/revisions\/67813"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=37224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=37224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=37224"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=37224"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=37224"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=37224"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=37224"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=37224"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=37224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}