{"id":37177,"date":"2025-05-11T16:13:20","date_gmt":"2025-05-11T16:13:20","guid":{"rendered":""},"modified":"2025-07-05T23:19:26","modified_gmt":"2025-07-06T05:19:26","slug":"cve-2023-39273-critical-integer-overflow-vulnerabilities-in-gtkwave-s-lxt2-facgeometry-parsing-function","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-39273-critical-integer-overflow-vulnerabilities-in-gtkwave-s-lxt2-facgeometry-parsing-function\/","title":{"rendered":"<strong>CVE-2023-39273: Critical Integer Overflow Vulnerabilities in GTKWave&#8217;s LXT2 facgeometry Parsing Function<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In this blog post, we delve into the critical details of a recently discovered vulnerability, CVE-2023-39273, affecting the LXT2 facgeometry parsing functionality of GTKWave version 3.3.115. This vulnerability is particularly concerning due to its potential to allow arbitrary code execution, which could lead to a full system compromise or data leakage. Because GTKWave is a widely used waveform viewer in the digital design industry, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35995-gtkwave-array-index-validation-vulnerability-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"42026\">vulnerability could lead<\/a> to significant disruptions and security issues if not properly addressed.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2023-39273<br \/>\nSeverity: High (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-2025-32974-critical-vulnerability-in-xwiki-s-rights-analysis-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"42243\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3245768967\" 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-2023-35996-arbitrary-code-execution-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"42049\">vulnerability resides in the LXT2 facgeometry parsing functionality of GTKWave<\/a>. It is based on integer <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=\"41909\">overflow vulnerabilities<\/a> that could occur when allocating the `flags` array. An attacker can craft a malicious .lxt2 file that, when opened by a victim, triggers the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35989-integer-overflow-vulnerability-in-gtkwave-s-lxt2-zlib-block-allocation\/\"  data-wpil-monitor-id=\"41922\">integer overflow<\/a>. This flaw could potentially lead to memory corruption, which in turn could be exploited to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32444-remote-code-execution-vulnerability-in-vllm-integration-with-mooncake\/\"  data-wpil-monitor-id=\"41889\">execute arbitrary code<\/a> on the victim&#8217;s system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1135800889\" 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>Below is a conceptual example of how an attacker might craft a malicious .lxt2 file to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47154-exploitation-of-use-after-free-vulnerability-in-libjs-in-ladybird\/\"  data-wpil-monitor-id=\"42351\">exploit this vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\nint main() {\nFILE *file;\nunsigned long long int large_value = 0xFFFFFFFFFFFFFFFF;\nfile = fopen(&quot;malicious.lxt2&quot;, &quot;w&quot;);\nif (file == NULL) {\nprintf(&quot;Error opening file\\n&quot;);\nreturn -1;\n}\nfwrite(&amp;large_value, sizeof(large_value), 1, file);\nfclose(file);\nreturn 0;\n}<\/code><\/pre>\n<p>In this simplified example, an attacker crafts a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-39271-integer-overflow-vulnerabilities-in-gtkwave-lxt2-parsing-functionality\/\"  data-wpil-monitor-id=\"43270\">.lxt2 file that contains an exceedingly large integer<\/a> value. When GTKWave attempts to allocate the `flags` array based on this value, it results in an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-36864-integer-overflow-vulnerability-in-gtkwave-3-3-115-with-potential-for-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"42465\">integer overflow and potential<\/a> memory corruption.<\/p>\n<p><strong>Recommended Mitigation<\/strong><\/p>\n<p>Users of the affected GTKWave version are strongly advised to apply the vendor-supplied <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49002-critical-vulnerability-in-dataease-bypassing-patch-for-cve-2025-32966\/\"  data-wpil-monitor-id=\"64185\">patch as soon as possible to mitigate this vulnerability<\/a>. In cases where immediate patching is not possible, employing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation, but these should not be considered a long-term solution. As always, caution should be exercised when <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-41691-sql-injection-vulnerability-in-os4ed-open-source-information-system-community\/\"  data-wpil-monitor-id=\"64184\">opening files from unknown sources<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In this blog post, we delve into the critical details of a recently discovered vulnerability, CVE-2023-39273, affecting the LXT2 facgeometry parsing functionality of GTKWave version 3.3.115. This vulnerability is particularly concerning due to its potential to allow arbitrary code execution, which could lead to a full system compromise or data leakage. Because GTKWave 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":[80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-37177","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\/37177","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=37177"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37177\/revisions"}],"predecessor-version":[{"id":57705,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37177\/revisions\/57705"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=37177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=37177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=37177"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=37177"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=37177"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=37177"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=37177"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=37177"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=37177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}