{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-17T14:24:55.620","vulnerabilities":[{"cve":{"id":"CVE-2020-8833","sourceIdentifier":"security@ubuntu.com","published":"2020-04-22T22:15:12.577","lastModified":"2024-11-21T05:39:31.937","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22."},{"lang":"es","value":"Una vulnerabilidad de Condición de Carrera de tipo Time-of-check Time-of-use en el cambio de propiedad del reporte de bloqueo en Apport, permite una posible oportunidad de escalada de privilegios. Si fs.protected_symlinks está deshabilitado, esto puede ser explotado entre las llamadas de os.open y os.chown cuando el script cron de Apport borra los archivos bloqueados de tamaño 0. Un enlace simbólico con el mismo nombre que el archivo eliminado puede entonces ser creado a partir de que chown sería llamado, cambiando el propietario del archivo a root. Corregido en las versiones 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 y 2.20.11-0ubuntu22."}],"metrics":{"cvssMetricV31":[{"source":"security@ubuntu.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N","baseScore":5.6,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":1.1,"impactScore":4.0},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","baseScore":4.7,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":1.0,"impactScore":3.6}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:L/AC:M/Au:N/C:P/I:N/A:N","baseScore":1.9,"accessVector":"LOCAL","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE"},"baseSeverity":"LOW","exploitabilityScore":3.4,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security@ubuntu.com","type":"Secondary","description":[{"lang":"en","value":"CWE-367"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-367"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*","matchCriteriaId":"815D70A8-47D3-459C-A32C-9FEACA0659D1"},{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*","matchCriteriaId":"7A5301BF-1402-4BE0-A0F8-69FBE79BC6D6"},{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","matchCriteriaId":"23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D"},{"vulnerable":true,"criteria":"cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*","matchCriteriaId":"A31C8344-3E02-4EB8-8BD8-4C84B7959624"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:apport_project:apport:-:*:*:*:*:*:*:*","matchCriteriaId":"47363193-B4DB-4654-BFAC-373426212337"}]}]}],"references":[{"url":"https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933","source":"security@ubuntu.com","tags":["Exploit","Third Party Advisory"]},{"url":"https://usn.ubuntu.com/4315-1/","source":"security@ubuntu.com","tags":["Third Party Advisory"]},{"url":"https://usn.ubuntu.com/4315-2/","source":"security@ubuntu.com","tags":["Third Party Advisory"]},{"url":"https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1862933","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Third Party Advisory"]},{"url":"https://usn.ubuntu.com/4315-1/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://usn.ubuntu.com/4315-2/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}]}