{"id":"CVE-2017-0902","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-0902","generatedAt":"2026-10-28T21:18:04.077Z","title":"RubyGems version 2.6.12 and earlier is vulnerable to a DNS hijacking vulnerability that allows a MITM attacker to force the RubyGems client to download and install gems from a server that the attacker controls.","description":"RubyGems version 2.6.12 and earlier is vulnerable to a DNS hijacking vulnerability that allows a MITM attacker to force the RubyGems client to download and install gems from a server that the attacker controls.","published":"2017-08-31T20:29:01.000Z","lastModified":"2026-06-17T00:58:30.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.0","score":8.1,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-350","CWE-346"],"affected":["rubygems/rubygems","debian/debian linux","canonical/ubuntu linux","redhat/enterprise linux desktop","redhat/enterprise linux server","redhat/enterprise linux server aus","redhat/enterprise linux server eus","redhat/enterprise linux server tus","redhat/enterprise linux workstation"],"epss":{"score":0.0475,"percentile":0.91831,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (4.75%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://blog.rubygems.org/2017/08/27/2.6.13-released.html","tags":["Patch","Vendor Advisory"],"source":"support@hackerone.com"},{"url":"http://www.securityfocus.com/bid/100586","tags":["Third Party Advisory","VDB Entry"],"source":"support@hackerone.com"},{"url":"http://www.securitytracker.com/id/1039249","tags":["Third Party Advisory","VDB Entry"],"source":"support@hackerone.com"},{"url":"https://access.redhat.com/errata/RHSA-2017:3485","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://access.redhat.com/errata/RHSA-2018:0378","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://access.redhat.com/errata/RHSA-2018:0583","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://access.redhat.com/errata/RHSA-2018:0585","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://github.com/rubygems/rubygems/commit/8d91516fb7037ecfb27622f605dc40245e0f8d32","tags":["Exploit","Patch","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/218088","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html","tags":["Mailing List","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://security.gentoo.org/glsa/201710-01","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://usn.ubuntu.com/3553-1/","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://usn.ubuntu.com/3685-1/","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://www.debian.org/security/2017/dsa-3966","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"http://blog.rubygems.org/2017/08/27/2.6.13-released.html","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/100586","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1039249","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:3485","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2018:0378","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2018:0583","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2018:0585","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/rubygems/rubygems/commit/8d91516fb7037ecfb27622f605dc40245e0f8d32","tags":["Exploit","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/218088","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201710-01","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/3553-1/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/3685-1/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2017/dsa-3966","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-0902","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}