CVE Vulnerabilities

CVE-2021-34548

Authentication Bypass by Spoofing

Published: Jun 29, 2021 | Modified: Aug 08, 2023
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu

An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-003. An attacker can forge RELAY_END or RELAY_RESOLVED to bypass the intended access control for ending a stream.

Weakness

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

Affected Software

Name Vendor Start Version End Version
Tor Torproject * 0.3.5.15 (excluding)
Tor Torproject 0.4.0.0 (including) 0.4.4.9 (excluding)
Tor Torproject 0.4.5.0 (including) 0.4.5.9 (excluding)
Tor Torproject 0.4.6.0 (including) 0.4.6.5 (excluding)

References