{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c)."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2026-01-26T16:23:52.247Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"url": "https://fatihhcelik.github.io/posts/NULL-Pointer-Dereference-Deark/"}, {"url": "https://github.com/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb"}, {"url": "https://github.com/fuzzing2026/CVE-PoCs/tree/main/deark-CVE-2021-28855"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-28855", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c)."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://fatihhcelik.github.io/posts/NULL-Pointer-Dereference-Deark/", "refsource": "MISC", "url": "https://fatihhcelik.github.io/posts/NULL-Pointer-Dereference-Deark/"}, {"name": "https://github.com/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb", "refsource": "MISC", "url": "https://github.com/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T21:55:11.826Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://fatihhcelik.github.io/posts/NULL-Pointer-Dereference-Deark/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-28855", "datePublished": "2021-04-14T16:11:11.000Z", "dateReserved": "2021-03-19T00:00:00.000Z", "dateUpdated": "2026-01-26T16:23:52.247Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:entropymine:deark:*:*:*:*:*:*:*:*", "matchCriteriaId": "DDEFD567-5B77-4505-9D83-F9A2EF0BBAB3", "versionEndExcluding": "1.5.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c)."}, {"lang": "es", "value": "En Deark versiones anteriores a 15.8, un archivo de entrada especialmente dise\u00f1ado puede causar una desreferencia del puntero NULL en la funci\u00f3n dbuf_write (en el archivo src/deark-dbuf.c)"}], "id": "CVE-2021-28855", "lastModified": "2026-01-26T17:16:08.120", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-04-14T17:15:14.363", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://fatihhcelik.github.io/posts/NULL-Pointer-Dereference-Deark/"}, {"source": "cve@mitre.org", "url": "https://github.com/fuzzing2026/CVE-PoCs/tree/main/deark-CVE-2021-28855"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://fatihhcelik.github.io/posts/NULL-Pointer-Dereference-Deark/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{}