{"id":73428,"date":"2025-09-09T16:27:29","date_gmt":"2025-09-09T16:27:29","guid":{"rendered":""},"modified":"2025-09-26T15:35:48","modified_gmt":"2025-09-26T21:35:48","slug":"cve-2023-21476-out-of-bounds-write-vulnerability-in-libaudiosaplus-sec-so-library","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-21476-out-of-bounds-write-vulnerability-in-libaudiosaplus-sec-so-library\/","title":{"rendered":"<strong>CVE-2023-21476: Out-of-bounds Write Vulnerability in libaudiosaplus_sec.so Library<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>Today, we are focusing on a critical cybersecurity vulnerability, identified as CVE-2023-21476, which is an Out-of-bounds Write vulnerability found in the libaudiosaplus_sec.so library. This vulnerability affects all versions of the library prior to SMR Apr-2023 Release 1. An <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43575-critical-out-of-bounds-write-vulnerability-in-acrobat-reader\/\"  data-wpil-monitor-id=\"81029\">out-of-bounds write vulnerability<\/a> can have serious implications, as it potentially allows a local attacker to execute arbitrary code, leading to system compromise or data leakage. Given the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24775-high-severity-unrestricted-file-upload-vulnerability-in-made-i-t-forms\/\"  data-wpil-monitor-id=\"83078\">severity of this vulnerability<\/a>, understanding its nature, potential impact, and mitigation strategies becomes paramount for every cybersecurity professional and system administrator.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2023-21476<br \/>\nSeverity: High, CVSS Score &#8211; 8.0<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-45134-critical-vulnerability-in-mahara-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"82941\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-4094210625\" 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>libaudiosaplus_sec.so | Prior to SMR Apr-2023 Release 1<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The out-of-bounds write <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9245-high-risk-buffer-overflow-vulnerability-in-linksys-extenders\/\"  data-wpil-monitor-id=\"81049\">vulnerability occurs when a buffer overflow<\/a> in the libaudiosaplus_sec.so library is exploited. This can happen when the library attempts to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43300-out-of-bounds-write-issue-in-macos-and-ios-resulting-in-memory-corruption\/\"  data-wpil-monitor-id=\"84404\">write data outside the boundaries of allocated memory<\/a>. An attacker can craft malicious inputs, designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47169-heap-based-buffer-overflow-vulnerability-in-microsoft-office-word\/\"  data-wpil-monitor-id=\"82004\">overflow the buffer<\/a>, thus altering the data it was not supposed to. This alteration can lead to the execution of arbitrary code, often granting the attacker <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49686-privilege-elevation-vulnerability-in-windows-tcp-ip\/\"  data-wpil-monitor-id=\"81058\">elevated privileges<\/a>, resulting in overall system compromise or potential data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1611939381\" 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>Consider the following conceptual example, where a malicious payload is sent to a vulnerable endpoint, triggering the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-40740-out-of-bounds-read-vulnerability-in-solid-edge-se2025\/\"  data-wpil-monitor-id=\"81560\">out-of-bounds write vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/vulnerable\/endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;malicious_payload&quot;: &quot;buffer_overflow_data&quot; }<\/code><\/pre>\n<p>In this example, &#8220;buffer_overflow_data&#8221; would be crafted in such a way that it overflows the buffer in libaudiosaplus_sec.so when processed, leading to an out-of-bounds write and potentially allowing the attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54948-pre-authenticated-remote-code-execution-vulnerability-in-trend-micro-apex-one\/\"  data-wpil-monitor-id=\"81131\">execute arbitrary code<\/a>.<\/p>\n<p><strong>Recommended Mitigation<\/strong><\/p>\n<p>To mitigate the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55293-high-risk-vulnerability-in-meshtastic-s-mesh-networking-solution\/\"  data-wpil-monitor-id=\"81323\">risk associated with this vulnerability<\/a>, it is recommended to apply the vendor patch immediately, which is available for SMR Apr-2023 Release 1 of the libaudiosaplus_sec.so library. In case the patch cannot be applied immediately, using Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) could provide temporary mitigation. However, these are not long-term solutions and could still leave systems <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27845-critical-vulnerability-exposes-jwt-secret-resulting-in-elevated-permissions\/\"  data-wpil-monitor-id=\"81705\">exposed to other vulnerabilities<\/a>. Therefore, it is crucial to apply the vendor patch as soon as possible.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Today, we are focusing on a critical cybersecurity vulnerability, identified as CVE-2023-21476, which is an Out-of-bounds Write vulnerability found in the libaudiosaplus_sec.so library. This vulnerability affects all versions of the library prior to SMR Apr-2023 Release 1. An out-of-bounds write vulnerability can have serious implications, as it potentially allows a local attacker to execute [&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],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-73428","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73428","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=73428"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73428\/revisions"}],"predecessor-version":[{"id":77185,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73428\/revisions\/77185"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=73428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=73428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=73428"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=73428"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=73428"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=73428"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=73428"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=73428"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=73428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}