{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-04T05:38:12.886","vulnerabilities":[{"cve":{"id":"CVE-2021-30500","sourceIdentifier":"secalert@redhat.com","published":"2021-05-27T00:15:08.483","lastModified":"2025-04-11T12:27:55.013","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0. That allow attackers to execute arbitrary code and cause a denial of service via a crafted file."},{"lang":"es","value":"Se encontró desreferencia de puntero nulo en upx, en la función PackLinuxElf::canUnpack() en el archivo p_lx_elf.cpp, en versión UPX versión 4.0.0. Esto permite a atacantes ejecutar código arbitrario y causar una denegación de servicio por medio de un archivo diseñado"}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:P/A:P","baseScore":6.8,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}]},"weaknesses":[{"source":"secalert@redhat.com","type":"Secondary","description":[{"lang":"en","value":"CWE-476"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:upx:upx:4.0.0:*:*:*:*:*:*:*","matchCriteriaId":"82490EE3-906C-49A6-836B-1DB2E4457C7C"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*","matchCriteriaId":"142AD0DD-4CF3-4D74-9442-459CE3347E3A"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","matchCriteriaId":"E460AA51-FCDA-46B9-AE97-E6676AA5E194"}]}]}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1948692","source":"secalert@redhat.com","tags":["Issue Tracking","Third Party Advisory"]},{"url":"https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc","source":"secalert@redhat.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/upx/upx/issues/485","source":"secalert@redhat.com","tags":["Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1948692","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Third Party Advisory"]},{"url":"https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/upx/upx/issues/485","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Issue Tracking","Third Party Advisory"]}]}}]}