CVE-2025-69209

{"id": "CVE-2025-69209", "cveTags": [], "metrics": {"cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.9, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-01-21T20:16:10.280", "references": [{"url": "https://github.com/arduino/ArduinoCore-avr/commit/82a8ad2fb33911d8927c7af22e0472b94325d1a7", "source": "security-advisories@github.com"}, {"url": "https://github.com/arduino/ArduinoCore-avr/pull/613", "source": "security-advisories@github.com"}, {"url": "https://github.com/arduino/ArduinoCore-avr/releases/tag/1.8.7", "source": "security-advisories@github.com"}, {"url": "https://github.com/arduino/ArduinoCore-avr/security/advisories/GHSA-pvx3-fm7w-6hjm", "source": "security-advisories@github.com"}, {"url": "https://support.arduino.cc/hc/en-us/articles/24985906702748-ASEC-26-001-ArduinoCore-AVR-v1-8-7-Resolves-Stack-Based-Buffer-Overflow-Vulnerability", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-120"}]}], "descriptions": [{"lang": "en", "value": "ArduinoCore-avr contains the source code and configuration files of the Arduino AVR Boards platform. A vulnerability in versions prior to 1.8.7 allows an attacker to trigger a stack-based buffer overflow when converting floating-point values to strings with high precision. By passing very large `decimalPlaces` values to the affected String constructors or concat methods, the `dtostrf` function writes beyond fixed-size stack buffers, causing memory corruption and denial of service. Under specific conditions, this could enable arbitrary code execution on AVR-based Arduino boards.\n\n### Patches\n\n- The Fix is included starting from the `1.8.7` release available from the following link [ArduinoCore-avr v1.8.7](https://github.com/arduino/ArduinoCore-avr)\n\n- The Fixing Commit is available at the following link [1a6a417f89c8901dad646efce74ae9d3ddebfd59](https://github.com/arduino/ArduinoCore-avr/pull/613/commits/1a6a417f89c8901dad646efce74ae9d3ddebfd59)\n\n### References\n\n- [ASEC-26-001 ArduinoCore-avr vXXXX Resolves Buffer Overflow Vulnerability](https://support.arduino.cc/hc/en-us/articles/XXXXX)\n\n### Credits\n\n- Maxime Rossi Bellom and Ramtine Tofighi Shirazi from SecMate (https://secmate.dev/)"}, {"lang": "es", "value": "ArduinoCore-avr contiene el c\u00f3digo fuente y los archivos de configuraci\u00f3n de la plataforma Arduino AVR Boards. Una vulnerabilidad en versiones anteriores a la 1.8.7 permite a un atacante activar un desbordamiento de b\u00fafer basado en pila al convertir valores de punto flotante a cadenas con alta precisi\u00f3n. Al pasar valores `decimalPlaces` muy grandes a los constructores de String o m\u00e9todos concat afectados, la funci\u00f3n `dtostrf` escribe m\u00e1s all\u00e1 de los b\u00faferes de pila de tama\u00f1o fijo, causando corrupci\u00f3n de memoria y denegaci\u00f3n de servicio. Bajo condiciones espec\u00edficas, esto podr\u00eda permitir la ejecuci\u00f3n de c\u00f3digo arbitrario en placas Arduino basadas en AVR.\n\n### Parches\n\n- La soluci\u00f3n est\u00e1 incluida a partir de la versi\u00f3n `1.8.7` disponible en el siguiente enlace [ArduinoCore-avr v1.8.7](https://github.com/arduino/ArduinoCore-avr)\n\n- El commit de la soluci\u00f3n est\u00e1 disponible en el siguiente enlace [1a6a417f89c8901dad646efce74ae9d3ddebfd59](https://github.com/arduino/ArduinoCore-avr/pull/613/commits/1a6a417f89c8901dad646efce74ae9d3ddebfd59)\n\n### Referencias\n\n- [ASEC-26-001 ArduinoCore-avr vXXXX Resuelve la vulnerabilidad de desbordamiento de b\u00fafer](https://support.arduino.cc/hc/en-us/articles/XXXXX)\n\n### Cr\u00e9ditos\n\n- Maxime Rossi Bellom y Ramtine Tofighi Shirazi de SecMate (https://secmate.dev/)"}], "lastModified": "2026-04-15T00:35:42.020", "sourceIdentifier": "security-advisories@github.com"}