{"id":"CVE-2019-0039","state":"PUBLISHED","title":"Junos OS: Login credentials are vulnerable to brute force attacks through the REST API","description":"If REST API is enabled, the Junos OS login credentials are vulnerable to brute force attacks. The high default connection limit of the REST API may allow an attacker to brute-force passwords using advanced scripting techniques. Additionally, administrators who do not enforce a strong password policy can increase the likelihood of success from brute force attacks. Affected releases are Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D49; 15.1 versions prior to 15.1F6-S12, 15.1R7-S3; 15.1X49 versions prior to 15.1X49-D160; 15.1X53 versions prior to 15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69; 16.1 versions prior to 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3; 16.1X65 versions prior to 16.1X65-D49; 16.2 versions prior to 16.2R2-S7; 17.1 versions prior to 17.1R2-S10, 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R3-S1; 17.3 versions prior to 17.3R3-S2; 17.4 versions prior to 17.4R1-S6, 17.4R2-S2; 18.1 versions prior to 18.1R2-S4, 18.1R3-S1; 18.2 versions prior to 18.2R1-S5; 18.2X75 versions prior to 18.2X75-D30; 18.3 versions prior to 18.3R1-S1.","publishedAt":"2019-04-10T20:13:51.460Z","updatedAt":"2024-09-16T16:12:37.512Z","severity":{"score":5.3,"label":"Medium","version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"14.1X53","status":"affected","lessThan":"14.1X53-D49","versionType":"custom"},{"version":"15.1","status":"affected","lessThan":"15.1F6-S12, 15.1R7-S3","versionType":"custom"},{"version":"15.1X49","status":"affected","lessThan":"15.1X49-D160","versionType":"custom"},{"version":"15.1X53","status":"affected","lessThan":"15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69","versionType":"custom"},{"version":"16.1","status":"affected","lessThan":"16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3","versionType":"custom"},{"version":"16.1X65","status":"affected","lessThan":"16.1X65-D49","versionType":"custom"},{"version":"16.2","status":"affected","lessThan":"16.2R2-S7","versionType":"custom"},{"version":"17.1","status":"affected","lessThan":"17.1R2-S10, 17.1R3","versionType":"custom"},{"version":"17.2","status":"affected","lessThan":"17.2R1-S8, 17.2R3-S1","versionType":"custom"},{"version":"17.3","status":"affected","lessThan":"17.3R3-S2","versionType":"custom"},{"version":"17.4","status":"affected","lessThan":"17.4R1-S6, 17.4R2-S2","versionType":"custom"},{"version":"18.1","status":"affected","lessThan":"18.1R2-S4, 18.1R3-S1","versionType":"custom"},{"version":"18.2","status":"affected","lessThan":"18.2R1-S5","versionType":"custom"},{"version":"18.2X75","status":"affected","lessThan":"18.2X75-D30","versionType":"custom"},{"version":"18.3","status":"affected","lessThan":"18.3R1-S1","versionType":"custom"}]}],"references":["https://kb.juniper.net/JSA10928","http://www.securityfocus.com/bid/107899"],"weaknesses":["CWE-307"],"ingestedAt":"2026-10-29T19:45:08.139Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2019/0xxx/CVE-2019-0039.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2019-0039","state":"PUBLISHED","datePublished":"2019-04-10T20:13:51.460Z","dateUpdated":"2024-09-16T16:12:37.512Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2018-10-11T00:00:00.000Z"},"containers":{"cna":{"title":"Junos OS: Login credentials are vulnerable to brute force attacks through the REST API","descriptions":[{"lang":"en","value":"If REST API is enabled, the Junos OS login credentials are vulnerable to brute force attacks. The high default connection limit of the REST API may allow an attacker to brute-force passwords using advanced scripting techniques. Additionally, administrators who do not enforce a strong password policy can increase the likelihood of success from brute force attacks. Affected releases are Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D49; 15.1 versions prior to 15.1F6-S12, 15.1R7-S3; 15.1X49 versions prior to 15.1X49-D160; 15.1X53 versions prior to 15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69; 16.1 versions prior to 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3; 16.1X65 versions prior to 16.1X65-D49; 16.2 versions prior to 16.2R2-S7; 17.1 versions prior to 17.1R2-S10, 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R3-S1; 17.3 versions prior to 17.3R3-S2; 17.4 versions prior to 17.4R1-S6, 17.4R2-S2; 18.1 versions prior to 18.1R2-S4, 18.1R3-S1; 18.2 versions prior to 18.2R1-S5; 18.2X75 versions prior to 18.2X75-D30; 18.3 versions prior to 18.3R1-S1."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"14.1X53","status":"affected","lessThan":"14.1X53-D49","versionType":"custom"},{"version":"15.1","status":"affected","lessThan":"15.1F6-S12, 15.1R7-S3","versionType":"custom"},{"version":"15.1X49","status":"affected","lessThan":"15.1X49-D160","versionType":"custom"},{"version":"15.1X53","status":"affected","lessThan":"15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69","versionType":"custom"},{"version":"16.1","status":"affected","lessThan":"16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3","versionType":"custom"},{"version":"16.1X65","status":"affected","lessThan":"16.1X65-D49","versionType":"custom"},{"version":"16.2","status":"affected","lessThan":"16.2R2-S7","versionType":"custom"},{"version":"17.1","status":"affected","lessThan":"17.1R2-S10, 17.1R3","versionType":"custom"},{"version":"17.2","status":"affected","lessThan":"17.2R1-S8, 17.2R3-S1","versionType":"custom"},{"version":"17.3","status":"affected","lessThan":"17.3R3-S2","versionType":"custom"},{"version":"17.4","status":"affected","lessThan":"17.4R1-S6, 17.4R2-S2","versionType":"custom"},{"version":"18.1","status":"affected","lessThan":"18.1R2-S4, 18.1R3-S1","versionType":"custom"},{"version":"18.2","status":"affected","lessThan":"18.2R1-S5","versionType":"custom"},{"version":"18.2X75","status":"affected","lessThan":"18.2X75-D30","versionType":"custom"},{"version":"18.3","status":"affected","lessThan":"18.3R1-S1","versionType":"custom"}]}],"references":[{"url":"https://kb.juniper.net/JSA10928","tags":["x_refsource_CONFIRM"]},{"url":"http://www.securityfocus.com/bid/107899","name":"107899","tags":["vdb-entry","x_refsource_BID"]}],"metrics":[{"cvssV3_0":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-307","description":"CWE-307 Improper Restriction of Excessive Authentication Attempts","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","dateUpdated":"2019-04-15T09:06:04.000Z","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968"},"configurations":[{"lang":"en","value":"The REST API can be enabled using the following configuration option:\n\n  system services rest http\n  system services rest enable-explorer"}],"datePublic":"2019-04-10T00:00:00.000Z","exploits":[{"lang":"en","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: Junos OS 14.1X53-D49, 15.1F6-S12, 15.1R7-S3, 15.1X49-D160, 15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69, 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3, 16.1X65-D49, 16.2R2-S7, 17.1R2-S10, 17.1R3, 17.2R1-S8, 17.2R3-S1, 17.3R3-S2, 17.4R1-S6, 17.4R2-S2, 18.1R2-S4, 18.1R3-S1, 18.2R1-S5, 18.2X75-D30, 18.3R1-S1, 18.4R1, and all subsequent releases."}],"source":{"advisory":"JSA10928","defect":["1289313"],"discovery":"INTERNAL"},"workarounds":[{"lang":"en","value":"Setting a connection limit on REST API may help mitigate this issue.\n  set system services rest control connection-limit 100 \n\nUse access lists or firewall filters to limit API access to the device only from trusted hosts."}],"x_generator":{"engine":"Vulnogram 0.0.6"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"sirt@juniper.net","DATE_PUBLIC":"2019-04-10T16:00:00.000Z","ID":"CVE-2019-0039","STATE":"PUBLIC","TITLE":"Junos OS: Login credentials are vulnerable to brute force attacks through the REST API"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Junos OS","version":{"version_data":[{"version_affected":"<","version_name":"14.1X53","version_value":"14.1X53-D49"},{"version_affected":"<","version_name":"15.1","version_value":"15.1F6-S12, 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The high default connection limit of the REST API may allow an attacker to brute-force passwords using advanced scripting techniques. Additionally, administrators who do not enforce a strong password policy can increase the likelihood of success from brute force attacks. Affected releases are Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D49; 15.1 versions prior to 15.1F6-S12, 15.1R7-S3; 15.1X49 versions prior to 15.1X49-D160; 15.1X53 versions prior to 15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69; 16.1 versions prior to 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3; 16.1X65 versions prior to 16.1X65-D49; 16.2 versions prior to 16.2R2-S7; 17.1 versions prior to 17.1R2-S10, 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R3-S1; 17.3 versions prior to 17.3R3-S2; 17.4 versions prior to 17.4R1-S6, 17.4R2-S2; 18.1 versions prior to 18.1R2-S4, 18.1R3-S1; 18.2 versions prior to 18.2R1-S5; 18.2X75 versions prior to 18.2X75-D30; 18.3 versions prior to 18.3R1-S1."}]},"exploit":[{"lang":"en","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"generator":{"engine":"Vulnogram 0.0.6"},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.0"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-307 Improper Restriction of Excessive Authentication Attempts"}]}]},"references":{"reference_data":[{"name":"https://kb.juniper.net/JSA10928","refsource":"CONFIRM","url":"https://kb.juniper.net/JSA10928"},{"name":"107899","refsource":"BID","url":"http://www.securityfocus.com/bid/107899"}]},"solution":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: Junos OS 14.1X53-D49, 15.1F6-S12, 15.1R7-S3, 15.1X49-D160, 15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69, 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3, 16.1X65-D49, 16.2R2-S7, 17.1R2-S10, 17.1R3, 17.2R1-S8, 17.2R3-S1, 17.3R3-S2, 17.4R1-S6, 17.4R2-S2, 18.1R2-S4, 18.1R3-S1, 18.2R1-S5, 18.2X75-D30, 18.3R1-S1, 18.4R1, and all subsequent releases."}],"source":{"advisory":"JSA10928","defect":["1289313"],"discovery":"INTERNAL"},"work_around":[{"lang":"en","value":"Setting a connection limit on REST API may help mitigate this issue.\n  set system services rest control connection-limit 100 \n\nUse access lists or firewall filters to limit API access to the device only from trusted hosts."}]}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://kb.juniper.net/JSA10928","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"http://www.securityfocus.com/bid/107899","name":"107899","tags":["vdb-entry","x_refsource_BID","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T17:37:07.174Z"}}]}}}