CVE-2021-39246
CVSS V2 Low 3.6
CVSS V3 Medium 6.1
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).
Overview
- CVE ID
- CVE-2021-39246
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-09-24T19:15:07
- Last Modified Date
- 2021-10-01T13:00:50
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:a:torproject:tor_browser:*:*:*:*:*:*:*:* | 1 | OR | 10.5.6 | |
| cpe:2.3:a:torproject:tor_browser:11.0:alpha2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:torproject:tor_browser:11.0:alpha4:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:N
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 3.6
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Attack Vector
- PHYSICAL
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 6.1
- Base Severity
- MEDIUM
- Exploitability Score
- 0.9
- Impact Score
- 5.2
References
| Reference URL | Reference Tags |
|---|---|
| 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 |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-39246 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39246 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:52:46 | Added to TrackCVE | |||
| 2022-12-05 11:16:17 | 2021-09-24T19:15Z | 2021-09-24T19:15:07 | CVE Published Date | updated |
| 2022-12-05 11:16:17 | 2021-10-01T13:00:50 | CVE Modified Date | updated | |
| 2022-12-05 11:16:17 | Analyzed | Vulnerability Status | updated |