CVE-2021-28089

HIGH

Tor < 0.4.5.7 - Uncontrolled Resource Consumption via Directory Protocol

Title source: llm
STIX 2.1

Description

Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.

References (4)

Core 4
Core References
Release Notes, Vendor Advisory x_refsource_confirm
https://blog.torproject.org/node/2009
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202107-25

Scores

CVSS v3 7.5
EPSS 0.0167
EPSS Percentile 73.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-400
Status published
Products (6)
fedoraproject/fedora 33
torproject/tor 0.4.4.0 alpha
torproject/tor 0.4.4.1 alpha
torproject/tor 0.4.4.2 alpha
torproject/tor 0.4.4.3 alpha
torproject/tor < 0.3.5.14
Published Mar 19, 2021
Tracked Since Feb 18, 2026