CVE-2021-34548 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://gitlab.torproject.org/tpo/core/tor/-/issues/40389 https://blog.torproject.org/node/2041 https://security.gentoo.org/glsa/202107-25 http://packetstormsecurity.com/files/163510/Tor-Half-Closed-Connection-Stream-Confusion.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5