CVE Vulnerabilities

CVE-2021-42761

Session Fixation

Published: Feb 16, 2023 | Modified: Nov 07, 2023
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.

Weakness

Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.

Affected Software

Name Vendor Start Version End Version
Fortiweb Fortinet 5.6.0 (including) 5.9.2 (excluding)
Fortiweb Fortinet 6.0.0 (including) 6.0.8 (excluding)
Fortiweb Fortinet 6.1.0 (including) 6.1.3 (excluding)
Fortiweb Fortinet 6.2.0 (including) 6.2.7 (excluding)
Fortiweb Fortinet 6.3.0 (including) 6.3.17 (excluding)
Fortiweb Fortinet 6.4.0 (including) 7.0.0 (excluding)

Extended Description

Such a scenario is commonly observed when:

Potential Mitigations

References