cbcvebase.
CVE-2024-38193
published 2024-08-13

CVE-2024-38193: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

PriorityP184high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
KEVITWEXPLOIT
CISA Known Exploited Vulnerabilitydue 2024-09-03
Exploited in the wild
EPSS
27.56%
97.9th percentile
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Affected

49 ranges· showing 25
VendorProductVersion rangeFixed in
microsoftwindows_10_1507< 10.0.10240.2075110.0.10240.20751
microsoftwindows_10_1607< 10.0.14393.725910.0.14393.7259
microsoftwindows_10_1809< 10.0.17763.618910.0.17763.6189
microsoftwindows_10_21h2< 10.0.19044.478010.0.19044.4780
microsoftwindows_10_22h2< 10.0.19045.478010.0.19045.4780
microsoftwindows_10_version_1507>= 10.0.10240.0 < 10.0.10240.2075110.0.10240.20751
microsoftwindows_10_version_1607>= 10.0.14393.0 < 10.0.14393.725910.0.14393.7259
microsoftwindows_10_version_1809>= 10.0.17763.0 < 10.0.17763.618910.0.17763.6189
microsoftwindows_10_version_21h2>= 10.0.19043.0 < 10.0.19044.478010.0.19044.4780
microsoftwindows_10_version_22h2>= 10.0.19045.0 < 10.0.19045.478010.0.19045.4780
microsoftwindows_11_21h2< 10.0.22000.314710.0.22000.3147
microsoftwindows_11_22h2< 10.0.22621.403710.0.22621.4037
microsoftwindows_11_23h2< 10.0.22631.403710.0.22631.4037
microsoftwindows_11_24h2< 10.0.26100.145710.0.26100.1457
microsoftwindows_11_version_21h2>= 10.0.0 < 10.0.22000.314710.0.22000.3147
microsoftwindows_11_version_22h2>= 10.0.22621.0 < 10.0.22621.403710.0.22621.4037
microsoftwindows_11_version_22h3>= 10.0.22631.0 < 10.0.22631.403710.0.22631.4037
microsoftwindows_11_version_23h2>= 10.0.22631.0 < 10.0.22631.403710.0.22631.4037
microsoftwindows_11_version_24h2>= 10.0.26100.0 < 10.0.26100.145710.0.26100.1457
microsoftwindows_server_2008
microsoftwindows_server_2008_r2_service_pack_1>= 6.1.7601.0 < 6.1.7601.272776.1.7601.27277
microsoftwindows_server_2008_service_pack_2>= 6.0.6003.0 < 6.0.6003.228256.0.6003.22825
microsoftwindows_server_2012< 6.2.9200.250316.2.9200.25031
microsoftwindows_server_2012
microsoftwindows_server_2012>= 6.2.9200.0 < 6.2.9200.250316.2.9200.25031

Detection & IOCsextracted from sources · hover to see the quote

filenameappid.sys
  • Monitor for exploitation of CVE-2024-38193 (use-after-free in AFD.sys) resulting in kernel-level privilege escalation from standard user to SYSTEM/kernel access, a technique used by Lazarus Group (Diamond Sleet) to load the FudModule rootkit.
  • Detect in-memory loading of the FudModule rootkit, which performs direct kernel object manipulation (DKOM) to disable Windows monitoring features and bypass kernel security mechanisms.
  • Alert on BYOVD-style attacks that do NOT drop a third-party vulnerable driver — CVE-2024-38193 abuses AFD.sys, a driver present by default on all Windows systems, making traditional BYOVD driver-drop detections insufficient.
  • Check Point IPS signature available for detection: 'Microsoft Windows Ancillary Function Driver for WinSock Elevation of Privilege (CVE-2024-38193)'.
  • Lazarus Group initial access vector in related campaign: trojanized Python cryptocurrency price-retrieval app distributed via GitHub, reaching out to attacker-controlled domain for second-stage payload delivery.
  • ·CVE-2024-38193 was exploited as a zero-day before the August 2024 Patch Tuesday fix; systems not yet patched remain vulnerable. The vulnerability requires no third-party driver installation, making pre-patch BYOVD driver-block mitigations ineffective against this specific exploit path.

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
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