{"id":26768,"date":"2025-04-19T02:12:05","date_gmt":"2025-04-19T02:12:05","guid":{"rendered":""},"modified":"2025-09-08T04:19:00","modified_gmt":"2025-09-08T10:19:00","slug":"cve-2024-56406-buffer-overflow-vulnerability-in-perl-leading-to-potential-denial-of-service-and-code-execution","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2024-56406-buffer-overflow-vulnerability-in-perl-leading-to-potential-denial-of-service-and-code-execution\/","title":{"rendered":"<strong>CVE-2024-56406: Buffer Overflow Vulnerability in Perl Leading to Potential Denial of Service and Code Execution<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability labelled as CVE-2024-56406 has been identified within Perl, a widely-used general-purpose scripting language. Specifically, this vulnerability affects release branches 5.34, 5.36, 5.38, and 5.40 including development versions from 5.33.1 through 5.41.10. This vulnerability, if exploited, could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-55354-protection-mechanism-failure-in-lucee-leading-to-unauthorized-code-execution-and-data-access\/\"  data-wpil-monitor-id=\"31037\">lead to a Denial of Service and possibly Code Execution<\/a> attacks on platforms that lack sufficient defenses. It is of utmost importance for organizations using Perl to understand this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-43514-memory-corruption-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"31560\">vulnerability and take immediate steps to mitigate the potential<\/a> risks.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2024-56406<br \/>\nSeverity: High (CVSS: 8.6)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-33113-memory-corruption-vulnerability-leading-to-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"31338\">System compromise<\/a>, data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3976678994\" 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>Perl | 5.34, 5.36, 5.38, 5.40, 5.33.1 through 5.41.10<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>This vulnerability is a heap <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-0535-critical-buffer-overflow-in-tenda-pa6-1-0-1-21\/\"  data-wpil-monitor-id=\"30780\">buffer overflow<\/a> that occurs when there are non-ASCII bytes in the left-hand-side of the `tr` operator in Perl. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49661-untrusted-pointer-dereference-vulnerability-in-windows-ancillary-function-driver-for-winsock\/\"  data-wpil-monitor-id=\"80422\">function `S_do_trans_invmap` can overflow the destination pointer<\/a> `d`, which can lead to a segmentation fault. This fault condition can potentially be exploited by an attacker to execute arbitrary <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-21737-critical-sap-application-interface-framework-file-adapter-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"31885\">code<\/a> or crash the application, leading to a denial of service.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3754629881\" 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>An example of how this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-50123-exploitable-vulnerability-in-hozard-alarm-system-sms-authentication\/\"  data-wpil-monitor-id=\"35691\">vulnerability might be exploited<\/a> is as follows:<\/p>\n<pre><code class=\"\" data-line=\"\">$ perl -e &#039;$_ = &quot;\\x{FF}&quot; x 1000000; tr\/\\xFF\/\\x{100}\/;&#039;\nSegmentation fault (core dumped)<\/code><\/pre>\n<p>This command artificially creates a string with a large number of non-ASCII characters and attempts to translate these using the `tr` operator, causing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-0571-critical-buffer-overflow-vulnerability-in-totolink-lr1200gb\/\"  data-wpil-monitor-id=\"31179\">buffer overflow<\/a> and a subsequent segmentation fault.<\/p>\n<p><strong>Mitigation and Prevention<\/strong><\/p>\n<p>The recommended mitigation for CVE-2024-56406 is to apply the latest vendor patch that corresponds to your version of Perl. If this is not possible, consider using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation. These systems can be <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-50931-csrf-vulnerability-in-savignano-s-notify-allows-configuration-tampering\/\"  data-wpil-monitor-id=\"31968\">configured to detect and block attempts to exploit this vulnerability<\/a>. However, these measures should be considered temporary, and applying the vendor patch should be the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32672-critical-php-remote-file-inclusion-vulnerability-in-ultimate-bootstrap-elements-for-elementor\/\"  data-wpil-monitor-id=\"35690\">ultimate goal to fully mitigate the vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability labelled as CVE-2024-56406 has been identified within Perl, a widely-used general-purpose scripting language. Specifically, this vulnerability affects release branches 5.34, 5.36, 5.38, and 5.40 including development versions from 5.33.1 through 5.41.10. This vulnerability, if exploited, could lead to a Denial of Service and possibly Code Execution attacks on platforms that lack [&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":[86,87],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-26768","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-dos"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/26768","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=26768"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/26768\/revisions"}],"predecessor-version":[{"id":72841,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/26768\/revisions\/72841"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=26768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=26768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=26768"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=26768"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=26768"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=26768"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=26768"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=26768"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=26768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}