CVE Vulnerability

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).

3.6 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

6.1 /10

CVSS v3.0 : MEDIUM

V3 Legend

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

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
Configurations

Configuration 1
Information

Published : 2021-09-24 07:15

Updated : 2021-10-01 01:00

NVD link : CVE-2021-39246

Mitre link : CVE-2021-39246

Products Affected
No products.
CWE
CWE-532

Insertion of Sensitive Information into Log File