{"cve":"CVE-2017-0377","nvd":{"published":"2017-07-02T15:29:00.187","modified":"2026-06-17T00:57:35.907","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-200"],"references":["https://blog.torproject.org/blog/tor-0309-released-security-update-clients","https://blog.torproject.org/blog/tor-0314-alpha-released-security-update-clients","https://github.com/torproject/tor/commit/665baf5ed5c6186d973c46cdea165c0548027350","https://security-tracker.debian.org/CVE-2017-0377","https://trac.torproject.org/projects/tor/ticket/22753"],"products":["torproject:tor"],"source":"nvd","synced_at":"2026-10-19T20:43:44.556243339+00:00"},"epss":{"cve":"CVE-2017-0377","score":0.02446,"percentile":0.84347,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}