Bug 1467727 (CVE-2017-0377) - CVE-2017-0377 tor: improper implementation of guard-selection algorithm could weaken anonymity
Summary: CVE-2017-0377 tor: improper implementation of guard-selection algorithm could...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-0377
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1467728 1467729
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-07-04 21:39 UTC by Pedro Sampaio
Modified: 2020-11-05 10:32 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-09-20 11:36:40 UTC
Embargoed:

Attachments (Terms of Use)

Description Pedro Sampaio 2017-07-04 21:39:29 UTC 
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.

Upstream bug:

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

Upstream patch:

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

References:

https://blog.torproject.org/blog/tor-0309-released-security-update-clients
Comment 1 Pedro Sampaio 2017-07-04 21:39:52 UTC 
Created tor tracking bugs for this issue:

Affects: epel-all [bug 1467728]
Affects: fedora-all [bug 1467729]
Comment 2 Marcel Haerry 2017-07-26 09:10:26 UTC 
Only 0.3.0.x or 0.3.1.x versions were affected by this CVE. Fedora nor EPEL currently ship a Version > 0.2.9.10, which means nobody was affected and this could be closed.
Note You need to log in before you can comment on or make changes to this bug.