{"id":37011,"date":"2025-05-10T20:06:22","date_gmt":"2025-05-10T20:06:22","guid":{"rendered":""},"modified":"2025-05-14T17:24:46","modified_gmt":"2025-05-14T17:24:46","slug":"cve-2023-37921-multiple-arbitrary-write-vulnerabilities-in-gtkwave-3-3-115","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-37921-multiple-arbitrary-write-vulnerabilities-in-gtkwave-3-3-115\/","title":{"rendered":"<strong>CVE-2023-37921: Multiple Arbitrary Write Vulnerabilities in GTKWave 3.3.115<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerabilities and Exposures system has identified a critical vulnerability in GTKWave 3.3.115, a popular open-source software program for viewing digital timing waveforms. The vulnerability, designated CVE-2023-37921, involves multiple arbitrary write vulnerabilities in the VCD sorted bsearch functionality of GTKWave. If exploited, these <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2907-critical-vulnerability-in-order-delivery-date-wordpress-plugin-could-allow-full-site-takeover\/\"  data-wpil-monitor-id=\"41825\">vulnerabilities could allow<\/a> an attacker to execute arbitrary code, potentially leading to system compromise or data leakage. It&#8217;s critical for users and administrators of systems running <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32845-critical-sql-injection-vulnerability-in-telecontrol-server-basic\/\"  data-wpil-monitor-id=\"41709\">GTKWave<\/a> 3.3.115 to understand and address this vulnerability to maintain the security and integrity of their systems.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2023-37921<br \/>\nSeverity: High, CVSS score 7.8<br \/>\nAttack Vector: .vcd file<br \/>\nPrivileges Required: User level<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=\"42282\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1465368871\" 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 works by taking advantage of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-37922-arbitrary-write-vulnerabilities-in-gtkwave-s-vcd-sorted-bsearch-functionality\/\"  data-wpil-monitor-id=\"43141\">VCD sorted bsearch<\/a> functionality in GTKWave 3.3.115. An attacker crafts a malicious .vcd file, which when opened in the GTKWave software, triggers <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35995-gtkwave-array-index-validation-vulnerability-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"42003\">arbitrary write vulnerabilities<\/a>. This allows the attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35996-arbitrary-code-execution-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"42041\">execute arbitrary code<\/a> on the victim&#8217;s system. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44872-command-injection-vulnerability-in-tenda-ac9-v15-03-06-42-multi-via-the-formsetusbunload-function\/\"  data-wpil-monitor-id=\"42893\">vulnerability is triggered via<\/a> the vcd2vzt conversion utility, which means that any user who opens the malicious file will inadvertently trigger the exploit.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2967533105\" 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>Let&#8217;s assume that the malicious .vcd <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43951-local-file-inclusion-vulnerability-in-labvantage-prior-to-lv-8-8-0-13-hf6\/\"  data-wpil-monitor-id=\"41741\">file contains a special payload designed to exploit this vulnerability<\/a>. A pseudocode example of such a payload might look like this:<\/p>\n<pre><code class=\"\" data-line=\"\"># malicious payload within .vcd file\npayload = {\n&#039;command&#039;: &#039;arbitrary code here&#039;,\n&#039;trigger&#039;: &#039;vcd2vzt conversion utility&#039;\n}\n# function to write the payload to a target file\ndef exploit(target_file, payload):\nwith open(target_file, &#039;w&#039;) as f:\nf.write(payload)<\/code><\/pre>\n<p>This hypothetical payload, when processed by the vcd2vzt conversion utility within GTKWave, would trigger the arbitrary write <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32444-remote-code-execution-vulnerability-in-vllm-integration-with-mooncake\/\"  data-wpil-monitor-id=\"41867\">vulnerabilities and execute the arbitrary code<\/a> specified in the payload.<\/p>\n<p><strong>Remediation and Mitigation<\/strong><\/p>\n<p>The best course of action to protect against CVE-2023-37921 is to apply the vendor patch. As an interim measure before the patch is applied, or if the patch cannot be applied for some reason, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide a temporary mitigation against the exploit. However, these measures are not a substitute for patching and updating the software.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerabilities and Exposures system has identified a critical vulnerability in GTKWave 3.3.115, a popular open-source software program for viewing digital timing waveforms. The vulnerability, designated CVE-2023-37921, involves multiple arbitrary write vulnerabilities in the VCD sorted bsearch functionality of GTKWave. If exploited, these vulnerabilities could allow an attacker to execute arbitrary code, potentially [&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":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-37011","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37011","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=37011"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37011\/revisions"}],"predecessor-version":[{"id":38495,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37011\/revisions\/38495"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=37011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=37011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=37011"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=37011"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=37011"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=37011"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=37011"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=37011"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=37011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}