{"id":"CVE-2017-0377","aliases":["EUVD-2017-0731","GHSA-vxgf-qp88-w686","openSUSE-SU-2024:11469-1"],"status":"published","title":"Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not...","description":"Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not the exit relay's family), which might allow remote attackers to defeat intended anonymity properties by leveraging the existence of large families.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02446,"percentile":0.84449,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2017-07-02T15:00:00Z","modified":"2026-10-24T14:05:34Z","affected":[{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.6.7-2.2"}]}],"bundled":22}],"products":[{"vendor":"torproject","product":"tor"}],"references":[{"url":"https://trac.torproject.org/projects/tor/ticket/22753","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Vendor Advisory","report"]},{"url":"https://security-tracker.debian.org/CVE-2017-0377","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://blog.torproject.org/blog/tor-0309-released-security-update-clients","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Vendor Advisory","advisory"]},{"url":"https://blog.torproject.org/blog/tor-0314-alpha-released-security-update-clients","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Vendor Advisory","advisory"]},{"url":"https://github.com/torproject/tor/commit/665baf5ed5c6186d973c46cdea165c0548027350","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-0377"},{"url":"https://github.com/advisories/GHSA-vxgf-qp88-w686"},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2016-1254","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-0375","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-0376","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-0377","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-0380","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8819","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8820","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8821","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8822","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8823","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-0490","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-0491","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-8955","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-10592","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-10593","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-15572","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28089","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28090","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-34548","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-34549","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-34550","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-38385","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2017-0377","description":"Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not the exit relay's family), which might allow remote attackers to defeat intended anonymity properties by leveraging the existence of large families.","status":"published","published":"2017-07-02T15:00:00Z","modified":"2024-08-05T13:03:56.989Z","updated_at":"2026-11-02T14:33:22.699876Z"}],"euvd":[{"id":"EUVD-2017-0731","description":"Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not the exit relay's family), which might allow remote attackers to defeat intended anonymity properties by leveraging the existence of large families.","status":"published","published":"2017-07-02T15:00:00Z","modified":"2024-08-05T13:03:56Z","updated_at":"2026-11-03T02:39:24.365813Z"}],"ghsa":[{"id":"GHSA-vxgf-qp88-w686","title":"Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not...","description":"Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not the exit relay's family), which might allow remote attackers to defeat intended anonymity properties by leveraging the existence of large families.","status":"published","published":"2022-05-17T02:29:30Z","modified":"2023-01-27T05:04:44Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:42:32.175612Z"}],"nvd":[{"id":"CVE-2017-0377","description":"Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not the exit relay's family), which might allow remote attackers to defeat intended anonymity properties by leveraging the existence of large families.","status":"published","published":"2017-07-02T15:29:00.187Z","modified":"2026-06-17T00:57:35.907Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:03:51.893212Z"}],"osv":[{"id":"CVE-2017-0377","description":"Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not the exit relay's family), which might allow remote attackers to defeat intended anonymity properties by leveraging the existence of large families.","status":"published","published":"2017-07-02T15:29:00.187Z","modified":"2026-10-24T14:05:34.268773465Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:03.472693Z"},{"id":"openSUSE-SU-2024:11469-1","title":"tor-0.4.6.7-2.2 on GA media","description":"These are all security issues fixed in the tor-0.4.6.7-2.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:58:38.644616Z","updated_at":"2026-11-02T16:58:35.195147Z"}]}}