CVE-2021-42146

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "http://seclists.org/fulldisclosure/2024/Jan/19", "name": "http://seclists.org/fulldisclosure/2024/Jan/19", "tags": [], "refsource": ""}, {"url": "https://seclists.org/fulldisclosure/2024/Jan/19", "name": "https://seclists.org/fulldisclosure/2024/Jan/19", "tags": ["Mailing List", "Third Party Advisory"], "refsource": ""}, {"url": "https://seclists.org/fulldisclosure/2024/Jan/19", "name": "https://seclists.org/fulldisclosure/2024/Jan/19", "tags": ["Mailing List", "Third Party Advisory"], "refsource": ""}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. DTLS servers allow remote attackers to reuse the same epoch number within two times the TCP maximum segment lifetime, which is prohibited in RFC6347. This vulnerability allows remote attackers to obtain sensitive application (data of connected clients)."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-755"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-42146", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}}, "publishedDate": "2024-01-24T19:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:contiki-ng:tinydtls:2018-08-30:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2025-06-20T20:15Z"}