rogram do not give up root privileges when changing UIDs back to the original users, allowing root access. NIST National Vulnerability Database (NVD) -- services.nvd.nist.gov (CVE / CVSS / CPE). {"cve":{"id":"CVE-1999-0138","sourceIdentifier":"cve@mitre.org","published":"1996-06-26T04:00:00.000","lastModified":"2026-06-16T21:47:40.677","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"The suidperl and sperl program do not give up root privileges when changing UIDs back to the original users, allowing root access."}],"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:apple:a_ux:3.1.1:*:*:*:*:*:*:*","matchCriteriaId":"E7A2CCF8-36A1-4E5E-A36F-5E90357A2B42"},{"vulnerable":true,"criteria":"cpe:2.3:o:digital:osf_1:1.3:*:*:*:*:*:*:*","matchCriteriaId":"B804A762-00CC-4F03-9E6D-31BB36E4159A"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:2.0:*:*:*:*:*:*:*","matchCriteriaId":"F1F098C1-D09E-49B4-9B51-E84B6C4EA6CD"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:2.0.5:*:*:*:*:*:*:*","matchCriteriaId":"34797660-41F5-4358-B70F-2A40DE48F182"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:2.1.0:*:*:*:*:*:*:*","matchCriteriaId":"27C9E23D-AB82-4AE1-873E-C5493BB96AA1"},{"vulnerable":true,"criteria":"cpe:2.3:o:hp:hp-ux:8:*:*:*:*:*:*:*","matchCriteriaId":"19587780-3515-484C-BCB4-F2BB90106C5C"},{"vulnerable":true,"criteria":"cpe:2.3:o:hp:hp-ux:9:*:*:*:*:*:*:*","matchCriteriaId":"5E54D276-792B-40D2-B39B-5050028DE988"},{"vulnerable":true,"criteria":"cpe:2.3:o:hp:hp-ux:10:*:*:*:*:*:*:*","matchCriteriaId":"CC96D014-7CE2-4F61-BBAF-507829C542EA"},{"vulnerable":true,"criteria":"cpe:2.3:o:ibm:aix:3.2.5:*:*:*:*:*:*:*","matchCriteriaId":"D3C00FC9-AD97-4226-A0EA-7DB14AA592DE"},{"vulnerable":true,"criteria":"cpe:2.3:o:ibm:aix:4:*:*:*:*:*:*:*","matchCriteriaId":"0BAE3D61-9D78-46D7-87EB-5A33ECF86F83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:1.2.0:*:*:*:*:*:*:*","matchCriteriaId":"CCE246DE-641C-44A3-9FCC-5131655DBC1A"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:2.0:*:*:*:*:*:*:*","matchCriteriaId":"96A6EE7E-C79C-4B25-AFF0-C6638CB3C99A"},{"vulnerable":true,"criteria":"cpe:2.3:o:nec:asl_ux_4800:*:*:*:*:*:*:*:*","matchCriteriaId":"81B329CB-C41D-4487-A492-C34DC68899B6"},{"vulnerable":true,"criteria":"cpe:2.3:o:nec:ews-ux_v:4.2:*:*:*:*:*:*:*","matchCriteriaId":"EFDDBA47-A0E3-4EB2-868A-A9B998B0154E"},{"vulnerable":true,"criteria":"cpe:2.3:o:nec:ews-ux_v:4.2mp:*:*:*:*:*:*:*","matchCriteriaId":"6CF54267-A293-44B1-BD9A-14CD39F732C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:nec:up-ux_v:4.2mp:*:*:*:*:*:*:*","matchCriteriaId":"875BE14D-96DC-4973-B077-40C7DFC75B02"}]}]}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0138","source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0138","source":"af854a3a-2127-422b-91ae-364da2661108"}]}},