Local Privilege Escalation via Race Condition

An attacker with local access the to medical office computer can escalate his Windows user privileges to "NT AUTHORITY\SYSTEM" by exploiting a race condition in the Elefant Update Service during the repair or update process. When using the repair function, the service queries the server for a list of files and their hashes. In addition, instructions to execute binaries to finalize the repair process are included. The executables are executed as "NT AUTHORITY\SYSTEM" after they are copied over to the user writable installation folder (C:\Elefant1). This means that a user can overwrite either "PostESUUpdate.exe" or "Update_OpenJava.exe" in the time frame after the copy and before the execution of the final repair step. The overwritten executable is then executed as "NT AUTHORITY\SYSTEM".

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检查时间与使用时间(TOCTOU)的竞争条件

HASOMED Elefant 安全漏洞

HASOMED Elefant是德国HASOMED公司的一个练习软件。专门满足心理治疗师、儿童和青少年心理治疗师以及医学心理治疗师的需求。 HASOMED Elefant存在安全漏洞。具有医疗办公室计算机本地访问权限的攻击者可以通过在修复或更新过程中利用 Elefant 更新服务中的竞争条件将其 Windows 用户权限提升到“NT AUTHORITYSYSTEM”。

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