Information disclosure in Apple macOS
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).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Apple macOS
- Linux Kernel
- Microsoft Windows
- Torproject Tor Browser — versions 11.0
Weakness classification (CWE)
References
- github.com/sickcodes/security/blob/master/advisories/SICK-2021-111.md (Exploit, Third Party Advisory)
- sick.codes/sick-2021-111 (Exploit, Third Party Advisory)
- www.privacyaffairs.com/cve-2021-39246-tor-vulnerability (Third Party Advisory)
- gitlab.torproject.org/tpo/core/tor/-/commit/80c404c4b79f3bcba3fc4585d4c62a62a04… (Patch, Vendor Advisory)
- gitlab.torproject.org/tpo/core/tor/-/merge_requests/434 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-39246?
- CVE-2021-39246 is a medium-severity vulnerability in Apple macOS, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.1/10. Published 2021-09-24.
- How severe is CVE-2021-39246?
- Medium severity. CVSS v3 base score is 6.1 out of 10.