Vulnerability identifier: #VU83031
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-617
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Tor
Client/Desktop applications /
Web browsers
Vendor: tor.eff.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion when recording a failed rendezvous circuit on the service side for the MetricsPort. A remote attacker can perform a denial of service attack of the onion service.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Tor: 0.4.8.4 - 0.4.8.8
External links
http://gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.8.9/ChangeLog
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.