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AppdynamicsApplication · Cisco

CVE-2024-20394

MEDIUM · 5.5 CVSS v3.1 Published 2024-05-15
Fix available
A fix is available. Upgrade to 24.4.0 or later.
See remediation →
57/100
Remediation priority · Elevated
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
A vulnerability in Cisco AppDynamics Network Visibility Agent could allow an unauthenticated, local attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the inability to handle unexpected input. An attacker who has local device access could exploit this vulnerability by sending an HTTP request to the targeted service. A successful exploit could allow the attacker to cause a DoS condition by stopping the Network Agent Service on the local device.

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 vulnerability exists in Cisco AppDynamics Network Visibility Agent where improper input validation allows an unauthenticated, local attacker to send specially crafted HTTP requests that crash the Network Agent Service, causing a denial of service condition.

MitigationApply the vendor patch when available; until then, restrict local access to trusted personnel only and monitor for service interruptions.

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
AppdynamicsApplication
Affected:< 24.4.0

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

CVSS:3.1/AV:L/AC:L/PR:L/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. Confirm Network Visibility Agent is installed
    Identify whether Cisco AppDynamics Network Visibility Agent is deployed in your environment. Check installed software listings,容器 images, or deployment documentation for this specific component.
    Affected if The Network Visibility Agent component is present in the environment
  2. Determine the installed version
    Locate the version of the Network Visibility Agent software. Check installation directories, startup scripts, or the component's About/Version information. Compare your version against 24.4.0.
    Affected if The installed version is lower than 24.4.0
  3. Verify the HTTP service is accessible
    Identify whether the Network Agent Service HTTP listener is enabled and accessible. Check the service configuration for exposed HTTP endpoints or ports used by the agent.
    Affected if The HTTP service is running and accepting requests from local users
  4. Check service status and logs
    Review current Network Agent Service status and recent logs for crash events or unexpected restarts. Look for indicators of service interruptions.
    Affected if The service has crashed or shows unexpected restart patterns since the CVE was published

You are affected if the Network Visibility Agent is installed with a version lower than 24.4.0 and the HTTP service is accessible to local users.

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 24.4.0 or later
Fixed in 24.4.0
Interim mitigation

Apply the vendor patch when available; until then, restrict local access to trusted personnel only and monitor for service interruptions.

Recommended fix High confidence

24.4.0

  1. 1. Identify the current version of the Cisco AppDynamics Network Visibility Agent installed on the system
  2. 2. Download Cisco AppDynamics Network Visibility Agent version 24.4.0 or later from the official Cisco software downloads portal
  3. 3. Stop the Network Agent Service on the local device before performing the upgrade
  4. 4. Install the Network Visibility Agent version 24.4.0 upgrade package following standard installation procedures
  5. 5. After installation completes, restart the Network Agent Service
  6. 6. Verify the service is running and confirm the installed version is 24.4.0 or later

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

Fix this in Appdynamics Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.

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-2024-20394 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