{"id":39932,"date":"2025-05-18T18:29:10","date_gmt":"2025-05-18T18:29:10","guid":{"rendered":""},"modified":"2025-09-14T23:37:08","modified_gmt":"2025-09-15T05:37:08","slug":"cve-2024-20653-microsoft-common-log-file-system-elevation-of-privilege-vulnerability","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2024-20653-microsoft-common-log-file-system-elevation-of-privilege-vulnerability\/","title":{"rendered":"<strong>CVE-2024-20653: Microsoft Common Log File System Elevation of Privilege Vulnerability<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerabilities and Exposures (CVE) system has recorded a new vulnerability, tagged as CVE-2024-20653, which affects Microsoft&#8217;s Common Log File System (CLFS). This vulnerability allows malicious actors to escalate their privileges, potentially leading to system compromise or data leakage. In the world of cybersecurity, such <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-20698-windows-kernel-elevation-of-privilege-vulnerability-a-threat-to-system-security\/\"  data-wpil-monitor-id=\"47196\">vulnerabilities pose a significant threat<\/a>, particularly to businesses and organizations running the affected versions of Microsoft&#8217;s software. Understanding the nature of this vulnerability, its potential impact, and the appropriate mitigation <a href=\"https:\/\/www.ameeba.com\/blog\/building-a-cybersecurity-first-culture-a-crucial-step-for-u-s-manufacturing\/\"  data-wpil-monitor-id=\"45635\">steps is crucial<\/a> for IT and cybersecurity professionals.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2024-20653<br \/>\nSeverity: High (7.8 CVSS score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: Elevation of privilege <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29972-server-side-request-forgery-vulnerability-in-azure-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"44751\">leading to potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1417400516\" 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-2025-53786-microsoft-exchange-server-security-vulnerability-in-hybrid-deployments\/\"  data-wpil-monitor-id=\"81286\">Microsoft Windows Server<\/a> | 2012, 2016, 2019<br \/>\nMicrosoft Windows | 8, 8.1, 10<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31234-input-sanitization-flaw-leading-to-system-termination-and-kernel-memory-corruption\/\"  data-wpil-monitor-id=\"47866\">flaw in the Microsoft&#8217;s Common Log File System<\/a> (CLFS). An attacker who successfully exploited this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25014-prototype-pollution-vulnerability-in-kibana-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"44886\">vulnerability could run arbitrary code<\/a> in kernel mode. For example, an attacker could then install programs; view, change, or delete data; or create new <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47945-critical-vulnerability-in-donetick-task-management-application-allows-full-account-takeover\/\"  data-wpil-monitor-id=\"51719\">accounts with full<\/a> user rights.<br \/>\nTo exploit this vulnerability, an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3090-unauthenticated-remote-attack-leading-to-potential-data-leakage-and-system-compromise\/\"  data-wpil-monitor-id=\"75233\">attacker would first have to log on to the system<\/a>. An attacker could then run a specially crafted application that could exploit the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-11186-severe-access-control-vulnerability-in-cloudvision-portal\/\"  data-wpil-monitor-id=\"44993\">vulnerability and take control<\/a> of an affected system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3462566844\" 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 following pseudocode <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49526-out-of-bounds-write-vulnerability-in-illustrator-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"75232\">illustrates a concept of how the vulnerability<\/a> might be exploited:<\/p>\n<pre><code class=\"\" data-line=\"\">#include &lt;windows.h&gt;\nint exploit_CLFS_vulnerability() {\nHANDLE hDevice = CreateFileA(&quot;\\\\\\\\.\\\\CLFS&quot;, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);\nif (hDevice == INVALID_HANDLE_VALUE) {\nreturn 1;\n}\nBYTE payload[0x1000] = { \/* malicious payload here *\/ };\nDWORD bytesReturned;\nBOOL result = DeviceIoControl(hDevice, IOCTL_CODE, payload, sizeof(payload), NULL, 0, &amp;bytesReturned, NULL);\nCloseHandle(hDevice);\nif (!result) {\nreturn 1;\n}\n\/* If successful, the attacker now has kernel-level privileges *\/\nreturn 0;\n}<\/code><\/pre>\n<p>This hypothetical example assumes the attacker has access to the system and can run <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44022-arbitrary-code-execution-vulnerability-in-vvveb-cms-v-1-0-6\/\"  data-wpil-monitor-id=\"45361\">arbitrary code<\/a>. The code attempts to open the CLFS device and send a malicious payload via the `DeviceIoControl` function, which if successful, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-7032-security-flaw-allowing-privilege-escalation-through-untrusted-data-deserialization\/\"  data-wpil-monitor-id=\"47519\">allows the attacker to run code with kernel-level privileges<\/a>.<br \/>\nPlease note that this is a conceptual example and does not reflect a real-world exploit.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The primary recommended mitigation <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46658-critical-security-vulnerability-in-exonautweb-s-4c-strategies-exonaut-21-6\/\"  data-wpil-monitor-id=\"82528\">strategy is to apply security<\/a> patches provided by Microsoft. If patches cannot be applied immediately, measures such as using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigations. It&#8217;s also crucial to limit the ability of untrusted users to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46193-remote-code-execution-vulnerability-in-sourcecodester-client-database-management-system-1-0\/\"  data-wpil-monitor-id=\"45302\">execute code on affected systems<\/a> as much as possible.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerabilities and Exposures (CVE) system has recorded a new vulnerability, tagged as CVE-2024-20653, which affects Microsoft&#8217;s Common Log File System (CLFS). This vulnerability allows malicious actors to escalate their privileges, potentially leading to system compromise or data leakage. In the world of cybersecurity, such vulnerabilities pose a significant threat, particularly to businesses [&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":[88,82],"product":[95],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-39932","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-linux","vendor-microsoft","product-linux-kernel"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/39932","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=39932"}],"version-history":[{"count":13,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/39932\/revisions"}],"predecessor-version":[{"id":75046,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/39932\/revisions\/75046"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=39932"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=39932"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=39932"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=39932"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=39932"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=39932"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=39932"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=39932"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=39932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}