medium6.1
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.
Impact
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).
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Torproject | Tor Browser | through 10.5.6 Version 11.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-111.md
- https://gitlab.torproject.org/tpo/core/tor/-/commit/80c404c4b79f3bcba3fc4585d4c62a62a04f3ed9
- https://gitlab.torproject.org/tpo/core/tor/-/merge_requests/434
- https://sick.codes/sick-2021-111
- https://www.privacyaffairs.com/cve-2021-39246-tor-vulnerability
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-111.md
- https://gitlab.torproject.org/tpo/core/tor/-/commit/80c404c4b79f3bcba3fc4585d4c62a62a04f3ed9
- https://gitlab.torproject.org/tpo/core/tor/-/merge_requests/434
- https://sick.codes/sick-2021-111
- https://www.privacyaffairs.com/cve-2021-39246-tor-vulnerability