{"id":34505,"date":"2025-05-05T01:06:23","date_gmt":"2025-05-05T01:06:23","guid":{"rendered":""},"modified":"2025-05-17T23:20:56","modified_gmt":"2025-05-17T23:20:56","slug":"cve-2021-45465-critical-bmp-parsing-vulnerability-in-syngo-fastview","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2021-45465-critical-bmp-parsing-vulnerability-in-syngo-fastview\/","title":{"rendered":"<strong>CVE-2021-45465: Critical BMP Parsing Vulnerability in syngo fastView<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerabilities and Exposures (CVE) system has identified a significant vulnerability in all versions of syngo fastView, a software widely used in the healthcare sector for viewing and interpreting medical images. The vulnerability is identified by the CVE ID: CVE-2021-45465. The severity of this vulnerability is heightened given that it has the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3914-potential-arbitrary-file-uploads-and-system-compromise-in-aeropage-sync-for-airtable-wordpress-plugin\/\"  data-wpil-monitor-id=\"40601\">potential to compromise system<\/a> integrity or lead to data leakage, impacting not just the operation of healthcare services but also the privacy of patient data. Therefore, understanding and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4335-privilege-escalation-vulnerability-in-woocommerce-multiple-addresses-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"43742\">addressing this vulnerability<\/a> is of paramount importance.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2021-45465<br \/>\nSeverity: High (CVSS: 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: System Compromise, Potential <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-50612-escalation-of-privileges-and-data-leakage-in-fit2cloud-cloud-explorer-lite\/\"  data-wpil-monitor-id=\"41281\">Data Leakage<\/a><\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1962504943\" 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><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-42028-critical-vulnerability-in-syngo-fastview-allowing-remote-code-execution\/\"  data-wpil-monitor-id=\"40869\">syngo fastView<\/a> | All versions<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability in <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32843-sql-injection-vulnerability-in-telecontrol-server-basic-leading-to-authorization-bypass-and-data-manipulation\/\"  data-wpil-monitor-id=\"39208\">syngo<\/a> fastView arises due to inadequate validation of user-supplied data when parsing BMP files. This leads to a write-what-where condition, which means that an <a href=\"https:\/\/www.ameeba.com\/blog\/ahold-delhaize-cyber-attack-unpacking-the-data-breach-and-its-implications\/\"  data-wpil-monitor-id=\"39207\">attacker can write data<\/a> to any location they choose. By exploiting this vulnerability, an attacker is able to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-40446-arbitrary-code-execution-vulnerability-in-forkosh-mime-tex\/\"  data-wpil-monitor-id=\"39858\">execute arbitrary code<\/a> within the context of the current process.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3024394259\" 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>The vulnerability could be exploited by an attacker sending a malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-43958-arbitrary-file-upload-vulnerability-in-hospital-management-system-v4-0\/\"  data-wpil-monitor-id=\"39701\">BMP<\/a> file to the victim. The file, when opened in syngo fastView, would <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45428-remote-arbitrary-code-execution-vulnerability-in-tenda-ac9-v1-0-firmware\/\"  data-wpil-monitor-id=\"40050\">execute the attacker&#8217;s code<\/a>. The example below is a conceptual representation of the malicious BMP file.<\/p>\n<pre><code class=\"\" data-line=\"\"># Create a malicious .bmp file\necho -e &#039;\\x42\\x4d\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c\\x4c&#039; &gt; malicious.bmp\n# The sequence above represents the BMP header followed by the malicious code.<\/code><\/pre>\n<p>It&#8217;s important to note that the actual exploitation of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28039-pre-auth-remote-command-execution-vulnerability-in-totolink-ex1200t\/\"  data-wpil-monitor-id=\"39514\">vulnerability would require a more complex sequence of commands<\/a> and likely involve obfuscation techniques to avoid detection.<\/p>\n<p><strong>Countermeasures<\/strong><\/p>\n<p>To mitigate the risks associated with CVE-2021-45465, users are advised to apply a vendor-supplied patch. If a patch is not immediately available or can&#8217;t be installed promptly, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) may provide temporary mitigation. These measures can help identify and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35989-integer-overflow-vulnerability-in-gtkwave-s-lxt2-zlib-block-allocation\/\"  data-wpil-monitor-id=\"41966\">block attempts to exploit the vulnerability<\/a>. However, they are not a permanent solution and applying the official patch should be a priority to ensure robust protection.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerabilities and Exposures (CVE) system has identified a significant vulnerability in all versions of syngo fastView, a software widely used in the healthcare sector for viewing and interpreting medical images. The vulnerability is identified by the CVE ID: CVE-2021-45465. The severity of this vulnerability is heightened given that it has the potential [&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-34505","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\/34505","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=34505"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34505\/revisions"}],"predecessor-version":[{"id":39131,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/34505\/revisions\/39131"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=34505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=34505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=34505"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=34505"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=34505"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=34505"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=34505"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=34505"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=34505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}