CVE-2024-38100: 
vulnerability analysis and mitigation

Windows File Explorer Elevation of Privilege Vulnerability (CVE-2024-38100) was discovered and disclosed on July 9, 2024. The vulnerability affects multiple versions of Microsoft Windows Server, including Server 2016, 2019, and 2022. This security flaw was discovered by Andrea Pierini from Semperis and has been assigned a CVSS v3.1 base score of 7.8 (High) (NVD, Security Online).

The vulnerability, dubbed 'Leaked Wallpaper' by researcher Michael Zhmaylo, enables the leakage of a user's NetNTLM hash from any session, even from low-privileged accounts. The vulnerability has been assigned a CVSS v3.1 vector of CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating local access requirements with low attack complexity and no user interaction needed. The vulnerability is classified under CWE-284 (Improper Access Control) (NVD, Security Online).

The vulnerability allows attackers to elevate privileges to administrator level, potentially gaining complete control over affected systems. The successful exploitation of this vulnerability could lead to unauthorized access to system resources and compromise of system integrity (Security Online).

Microsoft has addressed this vulnerability in the July Patch Tuesday update through KB5040434, KB5040430, KB5040437, and KB5040438 for different Windows Server versions. Organizations are strongly advised to apply these security updates immediately to protect their systems (Rapid7, Security Online).