CVE-2017-0377 Information

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 Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5