PC portmapper allows attackers to register or unregister RPC services or spoof RPC services using a spoofed source IP address such as 127.0.0.1. NIST National Vulnerability Database (NVD) -- services.nvd.nist.gov (CVE / CVSS / CPE). {"cve":{"id":"CVE-1999-0195","sourceIdentifier":"cve@mitre.org","published":"1997-07-01T04:00:00.000","lastModified":"2026-06-16T21:47:53.223","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Denial of service in RPC portmapper allows attackers to register or unregister RPC services or spoof RPC services using a spoofed source IP address such as 127.0.0.1."}],"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:N/AC:L/Au:N/C:N/I:N/A:P","baseScore":5.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":10.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"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:sgi:irix:*:*:*:*:*:*:*:*","matchCriteriaId":"056B3397-81A9-4128-9F49-ECEBE1743EE8"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:2.6.20.1:*:*:*:*:*:*:*","matchCriteriaId":"1E3313D5-52E8-49B3-B145-170D9A26DA43"}]}]}],"references":[{"url":"https://www.cve.org/CVERecord?id=CVE-1999-0195","source":"cve@mitre.org"},{"url":"https://www.cve.org/CVERecord?id=CVE-1999-0195","source":"af854a3a-2127-422b-91ae-364da2661108"}]}},