CVE-2017-0377

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2017-0377
StatePUBLISHED
Assignerdebian
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-07-02 15:29:00 UTC
Updated2025-04-20 01:37:25 UTC
DescriptionTor 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.

Risk And Classification

Primary CVSS: v3.0 7.5 HIGH from [email protected]

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

Problem Types: CWE-200 | privacy bypass

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary7.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:N/AC:L/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Torproject Tor 0.3.0.1 alpha All All
Application Torproject Tor 0.3.0.2 alpha All All
Application Torproject Tor 0.3.0.3 alpha All All
Application Torproject Tor 0.3.0.4 All All All
Application Torproject Tor 0.3.0.5 All All All
Application Torproject Tor 0.3.0.6 All All All
Application Torproject Tor 0.3.0.7 All All All
Application Torproject Tor 0.3.0.8 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Tor affected Tor Not specified

References

ReferenceSourceLinkTags
#22753 (Resolve TROVE-2017-006: Regression in guard family avoidance in 0.3.0 series) – Tor Bug Tracker & Wiki af854a3a-2127-422b-91ae-364da2661108 trac.torproject.org Issue Tracking, Vendor Advisory
Tor 0.3.1.4-alpha is released (with security update for clients) | The Tor Blog af854a3a-2127-422b-91ae-364da2661108 blog.torproject.org Release Notes, Vendor Advisory
Tor 0.3.0.9 is released (with security update for clients) | The Tor Blog af854a3a-2127-422b-91ae-364da2661108 blog.torproject.org Release Notes, Vendor Advisory
Consider the exit family when applying guard restrictions. · torproject/tor@665baf5 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
CVE-2017-0377 af854a3a-2127-422b-91ae-364da2661108 security-tracker.debian.org Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report