{"id":37176,"date":"2025-05-11T15:12:59","date_gmt":"2025-05-11T15:12:59","guid":{"rendered":""},"modified":"2025-06-14T06:11:35","modified_gmt":"2025-06-14T12:11:35","slug":"cve-2023-39272-integer-overflow-vulnerability-in-gtkwave-lxt2-facgeometry-parsing","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-39272-integer-overflow-vulnerability-in-gtkwave-lxt2-facgeometry-parsing\/","title":{"rendered":"<strong>CVE-2023-39272: Integer Overflow Vulnerability in GTKWave LXT2 Facgeometry Parsing<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability, identified as CVE-2023-39272, has been discovered in the LXT2 facgeometry parsing functionality of GTKWave version 3.3.115. This impacts any individual or organization using this version of GTKWave, a popular waveform viewer for viewing VCD\/LXT, etc. The vulnerability relies on an integer overflow when allocating the `lsb` array, which could potentially be exploited leading to arbitrary code execution. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-45554-high-severity-memory-corruption-due-to-race-condition\/\"  data-wpil-monitor-id=\"58174\">Due to its severity<\/a> and potential impact, it is crucial to understand the nature of this vulnerability and implement the necessary countermeasures.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2023-39272<br \/>\nSeverity: High (7.8 CVSS Score)<br \/>\nAttack Vector: File-based<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: Arbitrary <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32444-remote-code-execution-vulnerability-in-vllm-integration-with-mooncake\/\"  data-wpil-monitor-id=\"41890\">Code Execution<\/a>, Potential System Compromise, Possible Data Leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3180443882\" 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>GTKWave | 3.3.115<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit revolves around the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-38657-out-of-bounds-write-vulnerability-in-gtkwave-lxt2-zlib-block-decompression\/\"  data-wpil-monitor-id=\"43143\">LXT2 facgeometry parsing functionality of GTKWave<\/a>. The <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=\"41910\">vulnerability arises due to an integer overflow<\/a> when allocating the `lsb` array. An attacker can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24189-memory-corruption-vulnerability-due-to-maliciously-crafted-web-content-in-various-operating-systems\/\"  data-wpil-monitor-id=\"51869\">craft a malicious<\/a> .lxt2 file that, when opened by the victim, triggers the overflow. This overflow can subsequently <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35995-gtkwave-array-index-validation-vulnerability-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"42007\">lead to arbitrary code<\/a> execution. This means an attacker could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32974-critical-vulnerability-in-xwiki-s-rights-analysis-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"42273\">potentially gain control over the system<\/a>, compromising it or leading to data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2449851982\" 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>Here&#8217;s a conceptual illustration of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47154-exploitation-of-use-after-free-vulnerability-in-libjs-in-ladybird\/\"  data-wpil-monitor-id=\"42352\">vulnerability might be exploited<\/a>. This pseudocode demonstrates crafting a malicious .lxt2 file:<\/p>\n<pre><code class=\"\" data-line=\"\"># Pseudocode for creating a malicious .lxt2 file\ndef create_malicious_file():\nfile = open(&quot;malicious.lxt2&quot;, &quot;w&quot;)\n# The data variable represents a specially crafted payload that triggers the integer overflow\ndata = generate_overflow_payload()\nfile.write(data)\nfile.close()\ndef generate_overflow_payload():\n# This pseudocode function would generate a payload designed to trigger the integer overflow\n# Note: this is a conceptual representation and may not directly correlate to real .lxt2 file structure or overflow exploit\nreturn &quot;overflow_triggering_data&quot;<\/code><\/pre>\n<p><strong>Prevention and Mitigation<\/strong><\/p>\n<p>To mitigate the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31637-high-risk-sql-injection-vulnerability-in-lambertgroup-shout\/\"  data-wpil-monitor-id=\"51868\">risks associated with this vulnerability<\/a>, the primary recommendation is to apply the vendor patch as soon as it is available. In the interim, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure, offering some level of protection against potential exploits.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability, identified as CVE-2023-39272, has been discovered in the LXT2 facgeometry parsing functionality of GTKWave version 3.3.115. This impacts any individual or organization using this version of GTKWave, a popular waveform viewer for viewing VCD\/LXT, etc. The vulnerability relies on an integer overflow when allocating the `lsb` array, which could potentially be [&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-37176","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\/37176","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=37176"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37176\/revisions"}],"predecessor-version":[{"id":51911,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37176\/revisions\/51911"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=37176"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=37176"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=37176"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=37176"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=37176"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=37176"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=37176"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=37176"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=37176"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}