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CVE-2021-39246

Published: Sep 24, 2021Updated: Nov 21, 2024 Sources: CVE List NVDCWE-532
NVD MITRE
6.1CVSSMEDIUM
EPSS Score
0.5%
Top 63.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Tor Browser through 10.5.6 and 11.x through 11.0a4 allows a correlation attack that can compromise the privacy of visits to v2 onion addresses. Exact timestamps of these onion-service visits are logged locally, and an attacker might be able to compare them to timestamp data collected by the destination server (or collected by a rogue site within the Tor network).

CVSS Vector Breakdown

AV:PAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:PAttack Vector
Physical
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-532

Affected Products

n/an/a
tor browsertorproject
Mixed
Security Products / secure-gateway-vpn
torprojectoss-projectUSSecurity Productsaka tor

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Credential Access
View detailed technique mapping

References

https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-111.md
github.com
https://sick.codes/sick-2021-111
sick.codes
https://www.privacyaffairs.com/cve-2021-39246-tor-vulnerability
privacyaffairs.com
and 2 more references View all →

Timeline

Published
Sep 24, 2021
Last Updated
Nov 21, 2024

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