PT-2024-4174 · Microsoft · Windows Cloud Files Mini Filter Driver+1

Alex Birnberg + 4 · CVE-2024-30085 · Published 2024-06-11 · Updated 2026-05-05

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Windows Cloud Files Mini Filter Driver (affected versions not specified)

Description A heap-based buffer overflow exists in the Windows Cloud Files Mini Filter Driver cldflt.sys. This issue allows a local attacker to escalate privileges from a regular user to SYSTEM. The flaw can be triggered by crafting a custom reparse point to corrupt an adjacent WNF STATE DATA object. This corruption can be leveraged to leak kernel pointers from an ALPC handle table object. Further exploitation involves corrupting a PipeAttribute object to leak token addresses and override privileges. Technical exploitation methods include using WNF Out-of-Bounds (OOB), Pipe Attributes, ALPC, and I/O Ring mechanisms to achieve arbitrary kernel read/write primitives or flip the KTHREAD.PreviousMode and strip EPROCESS.Protection.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

LPE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

BDU:2024-04659

CVE-2024-30085

ZDI-24-601

Affected Products

Windows

Windows Cloud Files Mini Filter Driver

References · 63

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/cve_2024_30085_cloud_files.rb · Exploit
• 🔥 https://github.com/Adamkadaban/CVE-2024-30085 · Exploit
• https://bdu.fstec.ru/vul/2024-04659 · Security Note
• https://osv.dev/vulnerability/CVE-2024-30085 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2024-30085 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-30085 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-30085 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-30085 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-24-601 · Security Note
• https://t.me/pentestingnews/54590 · Telegram Post
• https://twitter.com/ale_sp_brazil/status/2049187980108353928 · Twitter Post
• https://twitter.com/moton/status/1871555212659572929 · Twitter Post
• https://twitter.com/5mukx/status/2050587199729705337 · Twitter Post
• https://twitter.com/the_yellow_fall/status/1871380161897353641 · Twitter Post
• https://reddit.com/r/CVEWatch/comments/1t2hd5y/top_10_trending_cves_03052026 · Reddit Post