CVE-2020-8516
First published: Sun Feb 02 2020(Updated: )
** DISPUTED ** 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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Torproject Tor | <=0.4.1.8 | |
| Torproject Tor | >=0.4.2.0<=0.4.2.6 | |
| debian/tor | <=0.4.5.16-1<=0.4.7.16-1<=0.4.8.12-1.1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://lists.torproject.org/pipermail/tor-dev/2020-February/014147.html
- https://trac.torproject.org/projects/tor/ticket/33129
- http://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.html
- https://security-tracker.debian.org/tracker/CVE-2020-8516
- https://lists.torproject.org/pipermail/tor-dev/2020-February/014146.html
- https://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.html
Frequently Asked Questions
What is CVE-2020-8516?
CVE-2020-8516 is a vulnerability in the Tor daemon that allows remote attackers to discover circuit information.
What is the severity of CVE-2020-8516?
The severity of CVE-2020-8516 is medium with a CVSS score of 5.3.
How does CVE-2020-8516 affect Tor?
CVE-2020-8516 affects Tor versions 0.4.1.8 and 0.4.2.x through 0.4.2.6.
What is the remedy for CVE-2020-8516?
There is currently no remedy available for CVE-2020-8516. It is advised to update to a patched version when it becomes available.
Where can I find more information about CVE-2020-8516?
You can find more information about CVE-2020-8516 at the following references: [Link 1](https://lists.torproject.org/pipermail/tor-dev/2020-February/014146.html), [Link 2](https://lists.torproject.org/pipermail/tor-dev/2020-February/014147.html), [Link 3](https://security-tracker.debian.org/tracker/CVE-2020-8516).
- collector/nvd-index
- agent/references
- agent/type
- agent/first-publish-date
- agent/severity
- agent/author
- agent/status
- agent/description
- agent/tags
- agent/event
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- status/disputed
- vendor/torproject
- canonical/torproject tor
- version/torproject tor/0.4.1.8
- version/torproject tor/0.4.2.0
- version/torproject tor/0.4.2.6
- package-manager/debian