CVEvulnerability

CVE-2021-34549

7.5 HIGH Published 2021-06-29 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-06-29
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
Weaknesses
CWE-400

Description

An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-005. Hashing is mishandled for certain retrieval of circuit data. Consequently. an attacker can trigger the use of an attacker-chosen circuit ID to cause algorithm inefficiency.

Affected configurations

• torproject tor (< 0.3.5.15) • torproject tor (>= 0.4.0.0 < 0.4.4.9) • torproject tor (>= 0.4.5.0 < 0.4.5.9) • torproject tor (>= 0.4.6.0 < 0.4.6.5)

Related

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References