Vulnerability CVE-2020-8516
Published: 2020-02-02

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.

Type:

CWE-200

 (Information Exposure)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Torproject -> TOR 

 References:
https://lists.torproject.org/pipermail/tor-dev/2020-February/014146.html
https://lists.torproject.org/pipermail/tor-dev/2020-February/014147.html
https://security-tracker.debian.org/tracker/CVE-2020-8516
https://trac.torproject.org/projects/tor/ticket/33129
https://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.html
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