CVE-2021-3311 Information

Description

An issue was discovered in October through build 471. It reactivates an old session ID (which had been invalid after a logout) once a new login occurs. NOTE: this violates the intended Auth/Manager.php authentication behavior but admittedly is only relevant if an old session ID is known to an attacker.

CVSS Vector

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

Reference

https://octobercms.com/forum/chan/announcements https://github.com/octobercms/library/commit/642f597489e6f644d4bd9a0c267e864cabead024 https://anisiosantos.me/october-cms-token-reactivation

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8