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CVE-2020-8516
The daemon in Tor through 0.4.1.8 and 0.4.2.x through 0.4.2.6 does not verify that a rendezvous node is known before attempting to connect…
Medium5.3EPSS 2.5%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The daemon in Tor through 0.4.1.8 and 0.4.2.x through 0.4.2.6 does not verify that a rendezvous node is known before attempting to connect to it, which might make it easier for remote attackers to discover circuit information. NOTE: The network team of Tor claims this is an intended behavior and not a vulnerability
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 2.5% · top 15% of all CVEs (6 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (5)
- https://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.html (opens in a new tab)x_refsource_MISCx_transferred
- https://lists.torproject.org/pipermail/tor-dev/2020-February/014147.html (opens in a new tab)x_refsource_MISCx_transferred
- https://security-tracker.debian.org/tracker/CVE-2020-8516 (opens in a new tab)x_refsource_MISCx_transferred
- https://lists.torproject.org/pipermail/tor-dev/2020-February/014146.html (opens in a new tab)x_refsource_MISCx_transferred
- https://trac.torproject.org/projects/tor/ticket/33129 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-8516)Record last updated .