CVE Vulnerability

CVE-2021-34549

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://gitlab.torproject.org/tpo/core/tor/-/issues/40391 Broken Link
https://blog.torproject.org/node/2041 Release Notes Vendor Advisory
https://security.gentoo.org/glsa/202107-25 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
Information

Published : 2021-06-29 12:15

Updated : 2022-07-12 05:42

NVD link : CVE-2021-34549

Mitre link : CVE-2021-34549

Products Affected
No products.
CWE
CWE-400