{"id":86373,"date":"2026-02-03T12:28:12","date_gmt":"2026-02-03T12:28:12","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2024-52878-buffer-over-read-vulnerability-in-insyde-insydeh2o-kernel","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2024-52878-buffer-over-read-vulnerability-in-insyde-insydeh2o-kernel\/","title":{"rendered":"CVE-2024-52878: Buffer Over-Read Vulnerability in Insyde InsydeH2O Kernel<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The cybersecurity vulnerability outlined in this report, identified as CVE-2024-52878, affects the Insyde InsydeH2O kernel versions 5.2 through 5.7. This vulnerability poses a significant threat due to its potential to enable unauthorized system compromise or data leakage. The severity and potential impact of this vulnerability underscore the importance of immediate attention and mitigation.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2024-52878
\nSeverity: High (7.5 CVSS)
\nAttack Vector: Local
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: Potential system compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Insyde InsydeH2O Kernel | 5.2 before 05.29.50
\nInsyde InsydeH2O Kernel | 5.3 before 05.38.50
\nInsyde InsydeH2O Kernel | 5.4 before 05.46.50
\nInsyde InsydeH2O Kernel | 5.5 before 05.54.50
\nInsyde InsydeH2O Kernel | 5.6 before 05.61.50
\nInsyde InsydeH2O Kernel | 5.7 before 05.70.50<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability stems from the VariableServicesSetVariable () function in the VariableRuntimeDxe driver, which can be invoked by various calls. This function uses StrSize () to get the variable name size, StrLen () to get the variable name length, and StrCmp () to compare strings. These actions can lead to a buffer over-read, potentially resulting in unauthorized access or data leakage.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

This is a conceptual example showing how an unauthorized user might exploit this vulnerability:<\/p>\n

#include \nint main() {\nchar varName[100];\n\/\/ Fill varName with overly long string\nfor(int i=0; i<100; i++)\nvarName[i] = 'A';\nvarName[99] = '\\0';\n\/\/ Call vulnerable function\ngRT->SetVariable(varName, ...);\n}<\/code><\/pre>\n
Note: This is a conceptual example and may not directly represent actual exploit code.<\/p>\n
Recommendations<\/strong><\/p>\n
Users are advised to apply the vendor patch as soon as available. In the interim, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could be employed for temporary mitigation.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity vulnerability outlined in this report, identified as CVE-2024-52878, affects the Insyde InsydeH2O kernel versions 5.2 through 5.7. This vulnerability poses a significant threat due to its potential to enable unauthorized system compromise or data leakage. The severity and potential impact of this vulnerability underscore the importance of immediate attention and mitigation. Vulnerability […]<\/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,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-86373","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t