Session Fixation in Guardian/CMC before 22.6.2

Last update: 2023-09-04

Advisory IDNN-2023:8-01
TopicSession Fixation in Guardian/CMC before 22.6.2
CWE ImpactCWE-384: Session Fixation
Issue date2023-08-09
AffectsGuardian, CMC < v22.6.2
CVE Name(s)CVE-2023-24477
CVSS detailsCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS Score5.0
CVE Risk LevelMedium
Risk Level for Nozomi customersMedium


In certain conditions, depending on timing and the usage of the Chrome web browser, Guardian/CMC versions before 22.6.2 do not always completely invalidate the user session upon logout. Thus an authenticated local attacker may gain acces to the original user's session.


Unauthorized access.

Affected Products

Guardian, CMC < v22.6.2

Workarounds and Mitigations

Adopt best practices that include closing the browser after a logout.


Upgrade to v22.6.2, v23.0.0 or later.

Modification History

2023-08-09: Initial revision
2023-09-04: Minor updates to format and metadata to improve the CSAF implementation

Related Links


We thank the following parties for their efforts:

  • one of our Customers for reporting a bug, leading to Nozomi Networks confirming this issue


Nozomi Networks Product Security team can be reached at prodsec@nozominetworks.com.
More contact details on the PSIRT page.