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U Series ApplianceApplication · Beyondtrust

CVE-2024-4018

HIGH · 7.8 CVSS v3.1 Published 2024-04-19
Fix available
A fix is available. Upgrade to 4.0.3 or later.
See remediation →
80/100
Remediation priority · High
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
Improper Privilege Management vulnerability in BeyondTrust U-Series Appliance on Windows, 64 bit (local appliance api modules) allows Privilege Escalation.This issue affects U-Series Appliance: from 3.4 before 4.0.3.

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 · high confidence

Improper Privilege Management vulnerability in BeyondTrust U-Series Appliance (Windows 64-bit, local appliance api modules) allows local authenticated attackers to escalate privileges. The vulnerability exists in versions 3.4 through 4.0.2, prior to the patched version 4.0.3.

MitigationUpgrade BeyondTrust U-Series Appliance to version 4.0.3 or later to remediate this privilege escalation vulnerability.

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
U Series ApplianceApplication
Affected:>= 3.4, < 4.0.3

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
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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. Confirm BeyondTrust U-Series Appliance is in use
    Identify if the system is running BeyondTrust U-Series Appliance on Windows 64-bit. Check system information, installed programs, or appliance management console for product identification.
    Affected if The system is not a BeyondTrust U-Series Appliance running Windows 64-bit, then it is not affected by this specific CVE.
  2. Check installed version number
    Retrieve the BeyondTrust U-Series Appliance version. This may be visible in the appliance web console, management interface, or via system inventory tools. Compare the version to the affected range: 3.4 through 4.0.2.
    Affected if The installed version is 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 4.0, 4.0.1, or 4.0.2 (any version >= 3.4 and < 4.0.3).
  3. Verify local appliance API modules are present
    Check if the local appliance API modules are installed or enabled on the Windows 64-bit appliance. This may be configurable in the appliance settings or visible in the installed components list.
    Affected if The local appliance API modules are not present or disabled, the privilege escalation vector may not be exploitable.
  4. Confirm local authenticated access exists
    Review local user accounts and authentication methods configured on the appliance. The vulnerability requires a local authenticated attacker to exploit the privilege escalation.
    Affected if Local authentication is enabled and local user accounts exist on the appliance, creating the conditions for potential exploitation.

If the system is a BeyondTrust U-Series Appliance (Windows 64-bit) with the local appliance API modules enabled, and the installed version falls between 3.4 and 4.0.2 inclusive, the environment is affected by CVE-2024-4018.

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 4.0.3 or later
Fixed in 4.0.3
Interim mitigation

Upgrade BeyondTrust U-Series Appliance to version 4.0.3 or later to remediate this privilege escalation vulnerability.

Recommended fix High confidence

U Series Appliance version 4.0.3 or later

  1. Confirm current U-Series Appliance version is >= 3.4 and < 4.0.3 by accessing the appliance admin console or checking system information
  2. Schedule a maintenance window for the upgrade process
  3. Follow BeyondTrust's standard upgrade procedure for U-Series Appliance, typically via the admin interface or documented upgrade path
  4. Upgrade to version 4.0.3 or later (verify latest stable version on beyondtrust.com)
  5. After upgrade, verify the new version is running and confirm the vulnerability is resolved by reviewing system logs and privilege configurations
Caveat Review BeyondTrust release notes for 4.0.x for any configuration or feature changes that may require adjustment

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

Fix this in U Series Appliance Scoped from the published advisory
  • Consultation3.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA2.0 h
10.0 hours of engineering $1,770
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Scan for this in your stack

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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-2024-4018 in production — separate from our analysis above.

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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