CVE-2020-21548

{"id": "CVE-2020-21548", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2021-09-17T21:15:07.360", "references": [{"url": "https://github.com/saitoha/libsixel/issues/116", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/saitoha/libsixel/issues/116", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c."}, {"lang": "es", "value": "Libsixel versi\u00f3n 1.8.3, contiene un desbordamiento de b\u00fafer en la regi\u00f3n heap de la memoria en la funci\u00f3n sixel_encode_highcolor en el archivo tosixel.c"}], "lastModified": "2026-04-24T12:56:58.623", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:saitoha:libsixel:1.8.3:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D5F93337-AE97-4FF6-A6DB-C364C524B4A7"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}