CVE-2021-39246

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 v3.0 6.1 MEDIUM
CVSS v2.0 3.6 LOW

6.1^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 0.9 / Impact : 5.2

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

3.6^/10

CVSS v2.0 : LOW

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

Exploitability : 3.9 / Impact : 4.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://sick.codes/sick-2021-111	Exploit Third Party Advisory
https://gitlab.torproject.org/tpo/core/tor/-/commit/80c404c4b79f3bcba3fc4585d4c62a62a04f3ed9	Patch Vendor Advisory
https://www.privacyaffairs.com/cve-2021-39246-tor-vulnerability	Third Party Advisory
https://gitlab.torproject.org/tpo/core/tor/-/merge_requests/434	Vendor Advisory
https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-111.md	Exploit Third Party Advisory

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Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:a:torproject:tor_browser::::::::
	cpe:2.3:a:torproject:tor_browser:11.0:alpha2::::::
	cpe:2.3:a:torproject:tor_browser:11.0:alpha4::::::

OR	cpe:2.3:o:apple:macos:-:::::::*
	cpe:2.3:o:linux:linux_kernel:-:::::::*
	cpe:2.3:o:microsoft:windows:-:::::::*

Information

Published : 2021-09-24 12:15

Updated : 2021-10-01 06:00

NVD link : CVE-2021-39246

Mitre link : CVE-2021-39246

JSON object : View

CWE

CWE-532

Insertion of Sensitive Information into Log File

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Products Affected

torproject

tor_browser

microsoft

windows

apple

macos

linux

linux_kernel

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