{"containers": {"cna": {"affected": [{"product": "contiki-ng", "vendor": "contiki-ng", "versions": [{"status": "affected", "version": "< 4.8"}]}], "descriptions": [{"lang": "en", "value": "Contiki-NG is an open-source, cross-platform operating system for IoT devices. Because of insufficient validation of IPv6 neighbor discovery options in Contiki-NG, attackers can send neighbor solicitation packets that trigger an out-of-bounds read. The problem exists in the module os/net/ipv6/uip-nd6.c, where memory read operations from the main packet buffer, <code>uip_buf</code>, are not checked if they go out of bounds. In particular, this problem can occur when attempting to read the 2-byte option header and the Source Link-Layer Address Option (SLLAO). This attack requires ipv6 be enabled for the network. The problem has been patched in the develop branch of Contiki-NG. 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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:contiki-ng:contiki-ng:*:*:*:*:*:*:*:*", "matchCriteriaId": "8753C87C-46B4-467B-9598-30E562D5CB38", "versionEndExcluding": "4.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Contiki-NG is an open-source, cross-platform operating system for IoT devices. Because of insufficient validation of IPv6 neighbor discovery options in Contiki-NG, attackers can send neighbor solicitation packets that trigger an out-of-bounds read. The problem exists in the module os/net/ipv6/uip-nd6.c, where memory read operations from the main packet buffer, <code>uip_buf</code>, are not checked if they go out of bounds. In particular, this problem can occur when attempting to read the 2-byte option header and the Source Link-Layer Address Option (SLLAO). This attack requires ipv6 be enabled for the network. The problem has been patched in the develop branch of Contiki-NG. The upcoming 4.8 release of Contiki-NG will include the patch.Users unable to upgrade may apply the patch in Contiki-NG PR #1654."}, {"lang": "es", "value": "Contiki-NG es un sistema operativo de c\u00f3digo abierto y multiplataforma para dispositivos IoT. Debido a que no son comprobados suficientemente las opciones de detecci\u00f3n de vecinos IPv6 en Contiki-NG, los atacantes pueden enviar paquetes de solicitud de vecinos que desencadenan una lectura fuera de l\u00edmites. El problema se presenta en el m\u00f3dulo os/net/ipv6/uip-nd6.c, donde son realizadas operaciones de lectura en memoria del buffer principal de paquetes, (code)uip_buf(/code), no son comprobadas si salen de l\u00edmites. En particular, este problema puede ocurrir cuando es intentado leer el encabezado de opci\u00f3n de 2 bytes y la opci\u00f3n de direcci\u00f3n de capa de enlace de origen (SLLAO). Este ataque requiere que ipv6 est\u00e9 habilitado para la red. El problema ha sido parcheado en la rama de desarrollo de Contiki-NG. La pr\u00f3xima versi\u00f3n 4.8 de Contiki-NG incluir\u00e1 el parche. Los usuarios que no puedan actualizar pueden aplicar el parche en Contiki-NG PR #1654"}], "id": "CVE-2022-35926", "lastModified": "2022-08-11T14:14:18.087", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2022-08-04T21:15:08.013", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/contiki-ng/contiki-ng/pull/1654"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/contiki-ng/contiki-ng/pull/1654/commits/a4597001d50a04f4b9c78f323ba731e2f979802c"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.8"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-4hpq-4f53-w386"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Primary"}]}

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