{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-09-22T16:10:05.074","vulnerabilities":[{"cve":{"id":"CVE-2018-6557","sourceIdentifier":"security@ubuntu.com","published":"2018-08-21T16:29:00.637","lastModified":"2026-06-17T02:02:01.367","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly handled temporary files. A local attacker could use this issue to cause a denial of service, or possibly escalate privileges if kernel symlink restrictions were disabled."},{"lang":"es","value":"El script de actualización de MOTD en el paquete de archivos base en Ubuntu 18.04 LTS en versiones anteriores a la 10.1ubuntu2.2 y Ubuntu 18.10 anteriores a la 10.1ubuntu6 manejaba incorrectamente los archivos temporales. Un atacante local podría usar este problema para provocar una denegación de servicio o posiblemente escalar privilegios si se desactivan las restricciones de enlaces simbólicos del kernel."}],"affected":[{"source":"security@ubuntu.com","affectedData":[{"vendor":"Ubuntu","product":"base-files","versions":[{"version":"unspecified","lessThan":"10.1ubuntu2.2","versionType":"custom","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"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:H/A:H","baseScore":7.0,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.0,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:L/AC:M/Au:N/C:P/I:P/A:P","baseScore":4.4,"accessVector":"LOCAL","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":3.4,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-59"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:base-files_project:base-files:10.1ubuntu2.2:*:*:*:*:*:*:*","matchCriteriaId":"8A95C549-93EC-4A40-904F-7CFED2A94694"},{"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:18.10:*:*:*:*:*:*:*","matchCriteriaId":"07C312A0-CD2C-4B9C-B064-6409B25C278F"}]}]}],"references":[{"url":"http://www.securityfocus.com/bid/105148","source":"security@ubuntu.com","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1041530","source":"security@ubuntu.com","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://usn.ubuntu.com/3748-1/","source":"security@ubuntu.com","tags":["Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/105148","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1041530","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://usn.ubuntu.com/3748-1/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}