{"api_version":"1","generated_at":"2026-05-13T08:50:27+00:00","cve":"CVE-2023-37459","urls":{"html":"https://cve.report/CVE-2023-37459","api":"https://cve.report/api/cve/CVE-2023-37459.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-37459","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-37459"},"summary":{"title":"CVE-2023-37459","description":"Contiki-NG is an operating system for internet-of-things devices. In versions 4.9 and prior, when a packet is received, the Contiki-NG network stack attempts to start the periodic TCP timer if it is a TCP packet with the SYN flag set. But the implementation does not first verify that a full TCP header has been received. Specifically, the implementation attempts to access the flags field from the TCP buffer in the following conditional expression in the `check_for_tcp_syn` function. For this reason, an attacker can inject a truncated TCP packet, which will lead to an out-of-bound read from the packet buffer. As of time of publication, a patched version is not available. As a workaround, one can apply the changes in Contiki-NG pull request #2510 to patch the system.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2023-09-15 20:15:00","updated_at":"2023-09-19 15:14:00"},"problem_types":["CWE-125"],"metrics":[],"references":[{"url":"https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6648-m23r-hq8c","name":"https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6648-m23r-hq8c","refsource":"MISC","tags":[],"title":"Out-of-bounds read when processing a received IPv6 packet · Advisory · contiki-ng/contiki-ng · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/contiki-ng/contiki-ng/pull/2510","name":"https://github.com/contiki-ng/contiki-ng/pull/2510","refsource":"MISC","tags":[],"title":"tcpip: Check whether we have a full TCP header before checking if the SYN flag is set. by nvt · Pull Request #2510 · contiki-ng/contiki-ng · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-37459","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-37459","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"37459","vulnerable":"1","versionEndIncluding":"4.9","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"contiki-ng","cpe5":"contiki-ng","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-37459","ASSIGNER":"security-advisories@github.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"Contiki-NG is an operating system for internet-of-things devices. 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As a workaround, one can apply the changes in Contiki-NG pull request #2510 to patch the system."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-125: Out-of-bounds Read","cweId":"CWE-125"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"contiki-ng","product":{"product_data":[{"product_name":"contiki-ng","version":{"version_data":[{"version_affected":"=","version_value":"<= 4.9"}]}}]}}]}},"references":{"reference_data":[{"url":"https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6648-m23r-hq8c","refsource":"MISC","name":"https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6648-m23r-hq8c"},{"url":"https://github.com/contiki-ng/contiki-ng/pull/2510","refsource":"MISC","name":"https://github.com/contiki-ng/contiki-ng/pull/2510"}]},"source":{"advisory":"GHSA-6648-m23r-hq8c","discovery":"UNKNOWN"},"impact":{"cvss":[{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}]}},"nvd":{"publishedDate":"2023-09-15 20:15:00","lastModifiedDate":"2023-09-19 15:14:00","problem_types":["CWE-125"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM"},"exploitabilityScore":3.9,"impactScore":1.4}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:contiki-ng:contiki-ng:*:*:*:*:*:*:*:*","versionEndIncluding":"4.9","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}