{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-18T10:49:26.024","vulnerabilities":[{"cve":{"id":"CVE-2021-28040","sourceIdentifier":"cve@mitre.org","published":"2021-03-05T18:15:13.270","lastModified":"2024-11-21T05:59:01.787","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"An issue was discovered in OSSEC 3.6.0. An uncontrolled recursion vulnerability in os_xml.c occurs when a large number of opening and closing XML tags is used. Because recursion is used in _ReadElem without restriction, an attacker can trigger a segmentation fault once unmapped memory is reached."},{"lang":"es","value":"Se detectó un problema en OSSEC versión 3.6.0.&#xa0;Se presenta una vulnerabilidad de recursividad no controlada en el archivo os_xml.c cuando es usada una gran cantidad de etiquetas XML de apertura y cierre.&#xa0;Debido a que una recursividad es usada en _ReadElem sin restricción, un atacante puede desencadenar un fallo de segmentación una vez que es alcanzada la memoria no asignada"}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","baseScore":5.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":10.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-674"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ossec:ossec:3.6.0:*:*:*:*:*:*:*","matchCriteriaId":"5194EBBE-813E-4C77-BE63-1302B9E88855"}]}]}],"references":[{"url":"https://github.com/ossec/ossec-hids/issues/1953","source":"cve@mitre.org","tags":["Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://github.com/ossec/ossec-hids/issues/1953","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Issue Tracking","Third Party Advisory"]}]}}]}