.1 through 4.1.2 ignores the high order 16 bits in a 32 bit UID, which allows a local user to gain root access if the lower 16 bits are set to 0, as fixed by the NFS jumbo patch upgrade. NIST National Vulnerability Database (NVD) -- services.nvd.nist.gov (CVE / CVSS / CPE). {"cve":{"id":"CVE-1999-1021","sourceIdentifier":"cve@mitre.org","published":"1992-12-30T05:00:00.000","lastModified":"2026-06-16T21:49:32.350","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"NFS on SunOS 4.1 through 4.1.2 ignores the high order 16 bits in a 32 bit UID, which allows a local user to gain root access if the lower 16 bits are set to 0, as fixed by the NFS jumbo patch upgrade."}],"affected":[{"source":"cve@mitre.org","affectedData":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]}],"metrics":{"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:C/I:C/A:C","baseScore":7.2,"accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE"},"baseSeverity":"HIGH","exploitabilityScore":3.9,"impactScore":10.0,"acInsufInfo":false,"obtainAllPrivilege":true,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-Other"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:4.1:*:*:*:*:*:*:*","matchCriteriaId":"B5955AC0-3036-4943-B6BD-52DD3E039089"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:4.1.1:*:*:*:*:*:*:*","matchCriteriaId":"92B19A06-832D-4974-9D08-2CE787228592"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:4.1.2:*:*:*:*:*:*:*","matchCriteriaId":"E3A07C67-66FB-4ECF-BECB-C2BE72A80F3B"}]}]}],"references":[{"url":"http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/117&type=0&nav=sec.sba","source":"cve@mitre.org","tags":["Patch"]},{"url":"http://www.cert.org/advisories/CA-1992-15.html","source":"cve@mitre.org","tags":["Patch","Third Party Advisory","US Government Resource"]},{"url":"http://www.securityfocus.com/bid/47","source":"cve@mitre.org","tags":["Patch","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/82","source":"cve@mitre.org"},{"url":"http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/117&type=0&nav=sec.sba","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"http://www.cert.org/advisories/CA-1992-15.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory","US Government Resource"]},{"url":"http://www.securityfocus.com/bid/47","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/82","source":"af854a3a-2127-422b-91ae-364da2661108"}]}},