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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:contiki-ng:contiki-ng:*:*:*:*:*:*:*:*", "matchCriteriaId": "729B4607-C6BD-42DE-91BF-918A57D29A77", "versionEndIncluding": "4.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. Versions prior to 4.9 contain a NULL Pointer Dereference in BLE L2CAP module. The Contiki-NG operating system for IoT devices contains a Bluetooth Low Energy stack. An attacker can inject a packet in this stack, which causes the implementation to dereference a NULL pointer and triggers undefined behavior. More specifically, while processing the L2CAP protocol, the implementation maps an incoming channel ID to its metadata structure. In this structure, state information regarding credits is managed through calls to the function input_l2cap_credit in the module os/net/mac/ble/ble-l2cap.c. Unfortunately, the input_l2cap_credit function does not check that the metadata corresponding to the user-supplied channel ID actually exists, which can lead to the channel variable being set to NULL before a pointer dereferencing operation is performed. The vulnerability has been patched in the \"develop\" branch of Contiki-NG, and will be included in release 4.9. Users can apply the patch in Contiki-NG pull request #2253 as a workaround until the new package is released."}, {"lang": "es", "value": "Contiki-NG es un sistema operativo multiplataforma de c\u00f3digo abierto para dispositivos IoT de pr\u00f3xima generaci\u00f3n. Las versiones anteriores a la 4.9 contienen una desreferencia de puntero NULL en el m\u00f3dulo BLE L2CAP. El sistema operativo Contiki-NG para dispositivos IoT contiene una pila Bluetooth Low Energy. Un atacante puede inyectar un paquete en esta pila, lo que hace que la implementaci\u00f3n elimine la referencia a un puntero NULL y desencadene un comportamiento indefinido. M\u00e1s espec\u00edficamente, mientras procesa el protocolo L2CAP, la implementaci\u00f3n asigna un ID de canal entrante a su estructura de metadatos. En esta estructura, la informaci\u00f3n del estado de los cr\u00e9ditos se gestiona mediante llamadas a la funci\u00f3n input_l2cap_credit en el m\u00f3dulo os/net/mac/ble/ble-l2cap.c. Desafortunadamente, la funci\u00f3n input_l2cap_credit no verifica que los metadatos correspondientes al ID del canal proporcionado por el usuario realmente existan, lo que puede llevar a que la variable del canal se establezca en NULL antes de realizar una operaci\u00f3n de desreferenciaci\u00f3n del puntero. La vulnerabilidad ha sido parcheada en la rama \"desarrollo\" de Contiki-NG y se incluir\u00e1 en la versi\u00f3n 4.9. Los usuarios pueden aplicar el parche en la solicitud de extracci\u00f3n #2253 de Contiki-NG como workaround hasta que se lance el nuevo paquete."}], "id": "CVE-2022-41972", "lastModified": "2024-11-21T07:24:11.120", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 2.9, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.4, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-12-16T18:15:08.487", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/contiki-ng/contiki-ng/pull/2253"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-24xp-g5gf-6vvm"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/contiki-ng/contiki-ng/pull/2253"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-24xp-g5gf-6vvm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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