{"id":27514,"date":"2025-04-20T04:20:59","date_gmt":"2025-04-20T04:20:59","guid":{"rendered":""},"modified":"2025-05-30T13:06:40","modified_gmt":"2025-05-30T19:06:40","slug":"cve-2023-45559-tamaki-hamanoki-line-v-13-6-1-channel-access-token-leakage","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-45559-tamaki-hamanoki-line-v-13-6-1-channel-access-token-leakage\/","title":{"rendered":"<strong>CVE-2023-45559: Tamaki_hamanoki Line v.13.6.1 Channel Access Token Leakage<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>Cybersecurity vulnerabilities are a constant threat to the digital world. The vulnerability identified as CVE-2023-45559 is a significant one that affects users of Tamaki_hamanoki Line v.13.6.1. This <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=\"31905\">vulnerability allows potential<\/a> attackers to send crafted notifications by exploiting the leakage of the channel access token. Such a vulnerability, if exploited, could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-33114-npu-memory-corruption-leading-to-potential-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"31855\">lead to a system compromise or data<\/a> leakage, posing a serious risk to data integrity and confidentiality. It is essential to understand the <a href=\"https:\/\/www.ameeba.com\/blog\/psg-s-investment-in-cybersecurity-firm-glasswall-a-shrewd-step-in-an-increasingly-vulnerable-digital-landscape\/\"  data-wpil-monitor-id=\"41604\">vulnerability to ensure appropriate steps<\/a> are taken to mitigate the potential risks.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2023-45559<br \/>\nSeverity: High (8.2 CVSS)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-50930-cross-site-request-forgery-csrf-in-savignano-s-notify-leading-to-configuration-tampering-and-potential-data-leakage\/\"  data-wpil-monitor-id=\"31989\">Potential system compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2833684783\" 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>Tamaki_hamanoki Line | v.13.6.1<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by taking advantage of a weakness in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20188-cisco-ios-xe-software-for-wireless-lan-controllers-security-vulnerability\/\"  data-wpil-monitor-id=\"44090\">software&#8217;s security<\/a>. The vulnerability is in the way <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32650-sql-injection-vulnerability-in-ability-inc-s-accessibility-suite\/\"  data-wpil-monitor-id=\"33203\">Tamaki_hamanoki Line v.13.6.1 handles channel<\/a> access tokens. Attackers can send crafted notifications, effectively <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-20652-windows-html-platforms-security-feature-bypass-vulnerability\/\"  data-wpil-monitor-id=\"34098\">bypassing the security<\/a> measures in place. Once the attacker has the channel access token, they can use this to send malicious notifications, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-58136-critical-vulnerability-in-yii-2-framework-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"31712\">leading to potential system<\/a> compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4152988290\" 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 is a conceptual example of how the vulnerability might be exploited. This example demonstrates a POST request that could be used to send a crafted notification.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/send\/notification HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\nAuthorization: Bearer CHANNEL_ACCESS_TOKEN\n{ &quot;notification&quot;: { &quot;title&quot;: &quot;Malicious Notification&quot;, &quot;body&quot;: &quot;This is a malicious notification.&quot; } }<\/code><\/pre>\n<p>In the above example, replace `CHANNEL_ACCESS_TOKEN` with the leaked channel <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-47663-unauthenticated-remote-attacker-gaining-full-access-due-to-improper-json-web-tokens-implementation\/\"  data-wpil-monitor-id=\"41602\">access token<\/a>. The malicious notification can be crafted to exploit the <a href=\"https:\/\/www.ameeba.com\/blog\/yale-new-haven-health-system-data-breach-a-comprehensive-analysis-of-a-cybersecurity-breach-impacting-5-5-million-patients\/\"  data-wpil-monitor-id=\"41603\">system or leak data<\/a>.<\/p>\n<p><strong>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=\"51896\">risk associated with this vulnerability<\/a>, users are advised to apply the vendor patch. If the patch is not immediately available, users can temporarily use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and <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=\"43194\">block attempts to exploit this vulnerability<\/a>. Regularly updating and patching software is a critical component of maintaining system security and should be part of every user&#8217;s <a href=\"https:\/\/www.ameeba.com\/blog\/strengthening-cybersecurity-essential-strategies-to-fortify-your-digital-defense\/\"  data-wpil-monitor-id=\"32137\">cybersecurity strategy<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Cybersecurity vulnerabilities are a constant threat to the digital world. The vulnerability identified as CVE-2023-45559 is a significant one that affects users of Tamaki_hamanoki Line v.13.6.1. This vulnerability allows potential attackers to send crafted notifications by exploiting the leakage of the channel access token. Such a vulnerability, if exploited, could lead to a system [&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-27514","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\/27514","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=27514"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/27514\/revisions"}],"predecessor-version":[{"id":46440,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/27514\/revisions\/46440"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=27514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=27514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=27514"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=27514"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=27514"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=27514"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=27514"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=27514"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=27514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}