CVE-2020-8516
Tor Daemon Unknown Rendezvous Node Disclosure
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
INFO
Published Date :
Feb. 2, 2020, 1:15 p.m.
Last Modified :
Aug. 4, 2024, 10:15 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-8516.
| URL | Resource |
|---|---|
| https://lists.torproject.org/pipermail/tor-dev/2020-February/014146.html | Mailing List Vendor Advisory |
| https://lists.torproject.org/pipermail/tor-dev/2020-February/014147.html | Mailing List Vendor Advisory |
| https://security-tracker.debian.org/tracker/CVE-2020-8516 | Third Party Advisory |
| https://trac.torproject.org/projects/tor/ticket/33129 | Issue Tracking Vendor Advisory |
| https://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.html | Exploit Mitigation Technical Description Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-8516 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-8516 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Aug. 04, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 17, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 11, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Mar. 21, 2024
Action Type Old Value New Value Added Tag MITRE disputed -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Changed Description ** 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. 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 -
Modified Analysis by [email protected]
Apr. 18, 2022
Action Type Old Value New Value Changed Reference Type https://lists.torproject.org/pipermail/tor-dev/2020-February/014146.html No Types Assigned https://lists.torproject.org/pipermail/tor-dev/2020-February/014146.html Mailing List, Vendor Advisory Changed Reference Type https://lists.torproject.org/pipermail/tor-dev/2020-February/014147.html No Types Assigned https://lists.torproject.org/pipermail/tor-dev/2020-February/014147.html Mailing List, Vendor Advisory Changed Reference Type https://security-tracker.debian.org/tracker/CVE-2020-8516 No Types Assigned https://security-tracker.debian.org/tracker/CVE-2020-8516 Third Party Advisory Changed Reference Type https://trac.torproject.org/projects/tor/ticket/33129 No Types Assigned https://trac.torproject.org/projects/tor/ticket/33129 Issue Tracking, Vendor Advisory -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE CWE-200 NVD-CWE-noinfo -
CVE Modified by [email protected]
Feb. 10, 2020
Action Type Old Value New Value Added Reference https://security-tracker.debian.org/tracker/CVE-2020-8516 [No Types Assigned] Added Reference https://lists.torproject.org/pipermail/tor-dev/2020-February/014146.html [No Types Assigned] Added Reference https://trac.torproject.org/projects/tor/ticket/33129 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 10, 2020
Action Type Old Value New Value Added Reference https://lists.torproject.org/pipermail/tor-dev/2020-February/014147.html [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 05, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.html No Types Assigned https://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.html Exploit, Mitigation, Technical Description, Third Party Advisory Added CWE NIST CWE-200 Added CPE Configuration OR *cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* versions up to (including) 0.4.1.8 *cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* versions from (including) 0.4.2.0 up to (including) 0.4.2.6
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-8516 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-8516
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.19 }} 0.00%
score
0.56957
percentile