dbcve.org
Big Ip Next Central ManagerApplication · F5

CVE-2024-39809

HIGH · 8.8 CVSS v3.1 Published 2024-08-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
The Central Manager user session refresh token does not expire when a user logs out.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

The Central Manager application fails to invalidate session refresh tokens upon user logout, allowing previously issued tokens to remain functional even after the user has explicitly logged out. This enables persistent unauthorized access using tokens that should have been revoked.

MitigationImplement proper token invalidation at logout by removing active tokens from storage or marking them as revoked in the token validation logic.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Big Ip Next Central ManagerApplication
Affected:= 20.1.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the F5 Big IP Next Central Manager version
    Run 'tmsh show /cm device' or check the GUI under System > Software Management > Installed Versions, or query the API endpoint /mgmt/shared/system-version
    Affected if The installed version is exactly 20.1.0
  2. Confirm the product is the Central Manager component
    Verify the device role shows 'Central Manager' in tmsh output under /cm device or in the GUI system information
    Affected if The device is running the Central Manager component
  3. Verify the logout behavior (optional for definitive confirmation)
    Log in, obtain a refresh token, perform logout, then attempt to use the refresh token to obtain a new access token via the token endpoint
    Affected if The refresh token remains valid after logout and returns a new access token

A user is affected if they are running F5 Big IP Next Central Manager version 20.1.0 and refresh tokens are not invalidated upon user logout.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement proper token invalidation at logout by removing active tokens from storage or marking them as revoked in the token validation logic.

Fix this in Big Ip Next Central Manager Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing10.0 h
  • Review / QA6.0 h
34.0 hours of engineering $5,940
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-39809 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data