cbcvebase.
CVE-2023-36036
published 2023-11-14

CVE-2023-36036: Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

PriorityP187high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
KEVITWRansomware
CISA Known Exploited Vulnerabilitydue 2023-12-05
Exploited in the wild
EPSS
16.67%
96.7th percentile
Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

Affected

45 ranges· showing 25
VendorProductVersion rangeFixed in
microsoftwindows_10_1507< 10.0.10240.2030810.0.10240.20308
microsoftwindows_10_1607< 10.0.14393.645210.0.14393.6452
microsoftwindows_10_1809< 10.0.17763.512210.0.17763.5122
microsoftwindows_10_21h2< 10.0.19041.369310.0.19041.3693
microsoftwindows_10_22h2< 10.0.19045.369310.0.19045.3693
microsoftwindows_10_version_1507>= 10.0.10240.0 < 10.0.10240.2030810.0.10240.20308
microsoftwindows_10_version_1607>= 10.0.14393.0 < 10.0.14393.645210.0.14393.6452
microsoftwindows_10_version_1809>= 10.0.0 < 10.0.17763.512210.0.17763.5122
microsoftwindows_10_version_1809>= 10.0.17763.0 < 10.0.17763.512210.0.17763.5122
microsoftwindows_10_version_21h2>= 10.0.19043.0 < 10.0.19043.369310.0.19043.3693
microsoftwindows_10_version_22h2>= 10.0.19045.0 < 10.0.19045.369310.0.19045.3693
microsoftwindows_11_21h2< 10.0.22000.260010.0.22000.2600
microsoftwindows_11_22h2< 10.0.22621.271510.0.22621.2715
microsoftwindows_11_23h2< 10.0.22621.271510.0.22621.2715
microsoftwindows_11_version_21h2>= 10.0.0 < 10.0.22000.260010.0.22000.2600
microsoftwindows_11_version_22h2>= 10.0.22621.0 < 10.0.22621.271510.0.22621.2715
microsoftwindows_11_version_22h3>= 10.0.22631.0 < 10.0.22631.271510.0.22631.2715
microsoftwindows_11_version_23h2>= 10.0.22631.0 < 10.0.22631.271510.0.22631.2715
microsoftwindows_server_2008
microsoftwindows_server_2008_r2_service_pack_1>= 6.1.7601.0 < 6.1.7601.268166.1.7601.26816
microsoftwindows_server_2008_service_pack_2>= 6.0.6003.0 < 6.0.6003.223676.0.6003.22367
microsoftwindows_server_2012
microsoftwindows_server_2012>= 6.2.9200.0 < 6.2.9200.245696.2.9200.24569
microsoftwindows_server_2012_r2>= 6.3.9600.0 < 6.3.9600.216686.3.9600.21668
microsoftwindows_server_2016< 10.0.14393.645210.0.14393.6452

Detection & IOCsextracted from sources · hover to see the quote

ip46.225.231.170
ip144.172.99.68
ip64.94.85.158
ip140.82.6.45
ip45.76.241.51
ip144.172.88.18
ip64.190.113.187
ip45.59.122.231
port50508
port60503
urlhttps://www.dropbox.com/scl/fi/[REDACTED]/vuzggemyofftzpk6.zip?rlkey=elabnna8r5omwglaq4feay6ui&st=op5i7lea&dl=1
filenamecollector.py
filenamePmanager.py
filenameUSOShared1297.py
path%APPDATA%\WPy64-31401\python\pythonw.exe
path%TEMP%\configA.json
commandrundll32.exe davclnt.dll,DavSetCookie http:///C%24/Windows
snort
62627, 62628, 62630 - 62633 and 62641 - 62644
snort
300751 - 300753, 300757 and 300758
  • CVE-2023-36036 is exploited in the wild as a local privilege escalation to SYSTEM via the Windows Cloud Files mini-filter driver; patch application and monitoring for unexpected SYSTEM-level process elevation from non-privileged processes are key detection priorities.
  • Detect portable WinPython environments (WPy64-31401) executing from %APPDATA% as a strong indicator of ModeloRAT staging activity associated with CVE-2023-36036 exploitation chains.
  • Monitor for WebDAV authentication sprays using davclnt.dll DavSetCookie, which was used post-CVE-2023-36036 exploitation to validate credential reuse across internal systems.
  • Talos Snort rules 62627, 62628, 62630–62633, 62641–62644 and Snort 3 rules 300751–300753, 300757, 300758 cover exploitation of vulnerabilities from the November 2023 Patch Tuesday batch including CVE-2023-36036.
  • collector.py performs host fingerprinting and hotfix enumeration to assess patch level before triggering CVE-2023-36036 LPE; detection of systeminfo, whoami /all, and Get-HotFix commands from pythonw.exe is a strong pre-exploitation signal.
  • ·Microsoft Teams external access is enabled by default in some environments, allowing external tenants to initiate direct chats with internal users; this feature was abused as the initial access vector in the observed CVE-2023-36036 exploitation chain.
  • ·Snort rules covering November 2023 Patch Tuesday vulnerabilities (including CVE-2023-36036) are subject to change; Cisco Secure Firewall customers should update their SRU and open-source Snort subscribers should download the latest rule pack from Snort.org.

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vulncheck7.8HIGH
cisa7.8HIGH
vendor_msrc7.8HIGH
CVEs like this are exactly what “Exploited This Week” covers.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.