attacker to connect to arbitrary ports on machines other than the FTP client, aka FTP bounce. NIST National Vulnerability Database (NVD) -- services.nvd.nist.gov (CVE / CVSS / CPE). {"cve":{"id":"CVE-1999-0017","sourceIdentifier":"cve@mitre.org","published":"1997-12-10T05:00:00.000","lastModified":"2026-06-16T21:47:21.560","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"FTP servers can allow an attacker to connect to arbitrary ports on machines other than the FTP client, aka FTP bounce."}],"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:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":true,"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:a:gnu:inet:5.01:*:*:*:*:*:*:*","matchCriteriaId":"679EB37A-DC20-4EB0-BF1E-664BF53AC054"},{"vulnerable":true,"criteria":"cpe:2.3:a:gnu:inet:6.01:*:*:*:*:*:*:*","matchCriteriaId":"4AF8F484-F5AA-4834-B976-764B2488F377"},{"vulnerable":true,"criteria":"cpe:2.3:a:gnu:inet:6.02:*:*:*:*:*:*:*","matchCriteriaId":"C692D0C5-BCF4-4C68-B7DF-EDCE4A55F1B4"},{"vulnerable":true,"criteria":"cpe:2.3:a:washington_university:wu-ftpd:2.4:*:*:*:*:*:*:*","matchCriteriaId":"A86BB4F6-210F-448A-A3CB-127BEB5BD0D2"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:caldera:openlinux:1.2:*:*:*:*:*:*:*","matchCriteriaId":"A5C77FA7-C977-4223-B6AC-91B82C45129C"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:1.0:*:*:*:*:*:*:*","matchCriteriaId":"44EFD22E-02C9-4B80-8934-A9AC8DD858CF"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:1.1:*:*:*:*:*:*:*","matchCriteriaId":"B1B4D4A5-25EB-48FE-BDFD-A274CE802648"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:1.2:*:*:*:*:*:*:*","matchCriteriaId":"F3A037F1-98AD-47CC-8D83-B42666E1B61E"},{"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:2.1.0:*:*:*:*:*:*:*","matchCriteriaId":"27C9E23D-AB82-4AE1-873E-C5493BB96AA1"},{"vulnerable":true,"criteria":"cpe:2.3:o:freebsd:freebsd:2.1.7:*:*:*:*:*:*:*","matchCriteriaId":"CF4F7002-A525-4A66-BE8B-E50ABBF144B2"},{"vulnerable":true,"criteria":"cpe:2.3:o:ibm:aix:3.2:*:*:*:*:*:*:*","matchCriteriaId":"DD5E0678-45C7-492A-963C-897494D6878F"},{"vulnerable":true,"criteria":"cpe:2.3:o:ibm:aix:4.1:*:*:*:*:*:*:*","matchCriteriaId":"FBF25306-E7C2-4F9A-A809-4779A6C0A079"},{"vulnerable":true,"criteria":"cpe:2.3:o:ibm:aix:4.2:*:*:*:*:*:*:*","matchCriteriaId":"05F20EC2-ADE6-4F96-A2E7-1DCCA819D657"},{"vulnerable":true,"criteria":"cpe:2.3:o:ibm:aix:4.3:*:*:*:*:*:*:*","matchCriteriaId":"11ACD012-F05F-45CD-A170-96CBAA42FFE4"},{"vulnerable":true,"criteria":"cpe:2.3:o:netbsd:netbsd:1.0:*:*:*:*:*:*:*","matchCriteriaId":"9DF613C9-DC4A-45F0-BEE1-8450762B0089"},{"vulnerable":true,"criteria":"cpe:2.3:o:netbsd:netbsd:1.1:*:*:*:*:*:*:*","matchCriteriaId":"441CEF2E-9687-4930-8536-B8B83018BD28"},{"vulnerable":true,"criteria":"cpe:2.3:o:netbsd:netbsd:1.2:*:*:*:*:*:*:*","matchCriteriaId":"55DD3C82-0B7D-4B25-B603-AD6C6D59239A"},{"vulnerable":true,"criteria":"cpe:2.3:o:netbsd:netbsd:1.2.1:*:*:*:*:*:*:*","matchCriteriaId":"FC7A39CD-C4B2-4FD9-A450-E5C7A5480174"},{"vulnerable":true,"criteria":"cpe:2.3:o:sco:open_desktop:3.0:*:*:*:*:*:*:*","matchCriteriaId":"0AD2701A-E930-4F4D-85F7-02F80135E34E"},{"vulnerable":true,"criteria":"cpe:2.3:o:sco:openserver:5.0.4:*:*:*:*:*:*:*","matchCriteriaId":"035FBF8B-EB91-4211-9979-8A9E913A54A1"},{"vulnerable":true,"criteria":"cpe:2.3:o:sco:unixware:2.1:*:*:*:*:*:*:*","matchCriteriaId":"168248AC-E4F6-4C8F-9A21-0E6ABE029DFC"},{"vulnerable":true,"criteria":"cpe:2.3:o:siemens:reliant_unix:*:*:*:*:*:*:*:*","matchCriteriaId":"8A2C5456-FF11-403E-B67E-5961278D812A"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:4.1.3u1:*:*:*:*:*:*:*","matchCriteriaId":"FD1BA107-F2D3-4F13-82EC-4576C429E3C1"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:4.1.4:*:*:*:*:*:*:*","matchCriteriaId":"1070749A-65E9-439A-A7CC-3CE529A5D5E7"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:5.3:*:*:*:*:*:*:*","matchCriteriaId":"C7A22D21-E0A9-4B56-86C7-805AD1A610D6"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:5.4:*:*:*:*:*:*:*","matchCriteriaId":"7AAC8954-74A8-4FE3-ABE7-57DA041D9D8F"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:5.4:*:x86:*:*:*:*:*","matchCriteriaId":"D1DEB967-BD3E-4CCF-B53F-3927454FA689"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:5.5:*:*:*:*:*:*:*","matchCriteriaId":"5B72953B-E873-4E44-A3CF-12D770A0D416"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:5.5:*:x86:*:*:*:*:*","matchCriteriaId":"1C89DF53-2038-487A-A08F-8D705B7BFB27"},{"vulnerable":true,"criteria":"cpe:2.3:o:sun:sunos:5.5.1:*:*:*:*:*:*:*","matchCriteriaId":"39F847DB-65A9-47DA-BCFA-A179E5E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