Detections
Analytics

CVE-2017-0377

high

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.

References

https://security-tracker.debian.org/CVE-2017-0377

https://github.com/torproject/tor/commit/665baf5ed5c6186d973c46cdea165c0548027350

https://trac.torproject.org/projects/tor/ticket/22753

https://blog.torproject.org/blog/tor-0314-alpha-released-security-update-clients

https://blog.torproject.org/blog/tor-0309-released-security-update-clients

Details

Source: Mitre, NVD

Published: 2017-07-02

Updated: 2025-04-20

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High

EPSS

EPSS: 0.00476