CVE-2023-36036: 
vulnerability analysis and mitigation

CVE-2023-36036 is a high-severity Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability discovered internally by Microsoft Threat Intelligence Microsoft Security Response Center. The vulnerability was disclosed and patched in Microsoft's November 2023 Patch Tuesday update. This security flaw affects the Windows Cloud Files Mini Filter driver, a component crucial for cloud file storage (NVD, SecurityOnline).

The vulnerability is rated with a CVSS v3.1 score of 7.8 (High) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The flaw stems from a boundary-writing issue within the Windows Cloud Files Mini Filter driver during the parsing of Reparse point data. The vulnerability is caused by the memcpy function's user-controllable length parameter and manageable source memory, which lacks proper validation before copying data (NVD, SecurityOnline).

Successful exploitation of this vulnerability allows attackers to gain SYSTEM privileges, effectively becoming an all-powerful administrator on the compromised system. The flaw enables attackers to craft and transmit malicious structures, leading to out-of-bounds writing and potential execution of arbitrary code within the kernel (SecurityOnline).

Microsoft has released security patches as part of the November 2023 Patch Tuesday update to address this vulnerability. The solution involves implementing a pre-decompression length check, where data lengths exceeding 0x4000 are flagged as erroneous, effectively preventing the vulnerability's exploitation (SecurityOnline).