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Big Ip Access Policy ManagerApplication · F5

CVE-2024-39778

HIGH · 7.5 CVSS v3.1 Published 2024-08-14
Fix available
A fix is available. Upgrade to 16.1.5 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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
When a stateless virtual server is configured on BIG-IP system with a High-Speed Bridge (HSB), undisclosed requests can cause TMM to terminate.   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

This is a denial of service vulnerability in F5 BIG-IP systems where undisclosed requests sent to a stateless virtual server configured with a High-Speed Bridge (HSB) can cause the TMM (Traffic Management Module) to terminate unexpectedly, disrupting traffic processing.

MitigationApply F5's vendor patch when available. Until then, restrict network access to BIG-IP systems with stateless virtual servers configured with HSB to minimize exposure to potential exploit attempts.

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 Access Policy ManagerApplication
Affected:>= 15.1.0, <= 15.1.1>= 16.1.0, < 16.1.5= 17.1.0
Big Ip Advanced Firewall ManagerApplication
Affected:>= 15.1.0, <= 15.1.1>= 16.1.0, < 16.1.5= 17.1.0
Big Ip Advanced Web Application FirewallApplication
Affected:>= 15.1.0, <= 15.1.1>= 16.1.0, < 16.1.5= 17.1.0
Big Ip AnalyticsApplication
Affected:>= 15.1.0, <= 15.1.1>= 16.1.0, < 16.1.5= 17.1.0
Big Ip Application Acceleration ManagerApplication
Affected:>= 15.1.0, <= 15.1.1>= 16.1.0, < 16.1.5= 17.1.0
Big Ip Application Security ManagerApplication
Affected:>= 15.1.0, <= 15.1.1>= 16.1.0, < 16.1.5= 17.1.0
Big Ip Application Visibility And ReportingApplication
Affected:>= 15.1.0, <= 15.1.1>= 16.1.0, < 16.1.5= 17.1.0
Big Ip Automation ToolchainApplication
Affected:>= 15.1.0, <= 15.1.1>= 16.1.0, < 16.1.5= 17.1.0

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
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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. Check BIG-IP version
    Run 'tmsh show sys version' or 'bigstart status' to retrieve the installed BIG-IP version. Compare against affected ranges: 15.1.0-15.1.1, 16.1.0-16.1.4, or 17.1.0
    Affected if Installed version falls within the affected version ranges
  2. Identify virtual servers with High-Speed Bridge
    Use tmsh command 'tmsh list ltm virtual' to list all virtual servers, then inspect each for HSB configuration using 'tmsh list ltm virtual <name>' to see if 'high-speed-bridge' profile is assigned
    Affected if Any virtual server has a High-Speed Bridge (hsb) profile configured
  3. Verify if HSB virtual servers are stateless
    For each virtual server with HSB configured, examine the profile settings to determine if it is operating in stateless mode (check for stateless-related profile parameters or settings)
    Affected if The virtual server with HSB is configured as stateless (stateless mode enabled)

Environment is affected if running a BIG-IP version within 15.1.0-15.1.1, 16.1.0-16.1.4, or 17.1.0 AND has a stateless virtual server configured with a High-Speed Bridge profile.

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.

dbcve · scoped
Upgrade available Upgrade to 16.1.5 or later
Fixed in 16.1.5
Interim mitigation

Apply F5's vendor patch when available. Until then, restrict network access to BIG-IP systems with stateless virtual servers configured with HSB to minimize exposure to potential exploit attempts.

Recommended fix High confidence

BIG-IP 16.1.5 (or later supported version)

  1. 1. Identify the currently installed BIG-IP version using 'tmsh show sys version' or the web management console.
  2. 2. Confirm the affected BIG-IP module (APM, AFM, ASM, etc.) is in use with stateless virtual servers and High-Speed Bridge (HSB) configuration.
  3. 3. Schedule a maintenance window for the upgrade, as this requires a system reboot.
  4. 4. Back up the current BIG-IP configuration using 'tmsh save sys config' or the web management console.
  5. 5. Download the fixed BIG-IP version 16.1.5 from the F5 Downloads portal (my.f5.com).
  6. 6. Upload and install the ISO/image via the web management console or tmsh: 'tmsh install sys software volume <volume-name> image <image-name>'.
  7. 7. Reboot the system to activate the new version.
  8. 8. Verify the upgrade was successful and the TMM process is running normally.
Caveat Review F5 release notes for 16.1.5 for any configuration or feature changes before upgrading; test in non-production environment first.

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Big Ip Access Policy Manager Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,120
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,392.

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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-2024-39778 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