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Emc NetworkerApplication · Dell

CVE-2023-25544

MEDIUM · 6.5 CVSS v3.1 Published 2023-03-01
Fix available
A fix is available. Upgrade to 19.6 or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable 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
Dell NetWorker versions 19.5 and earlier contain 'Apache Tomcat' version disclosure vulnerability. A NetWorker server user with remote access to NetWorker clients may potentially exploit this vulnerability and may launch target-specific attacks.

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

Dell NetWorker versions 19.5 and earlier include an embedded Apache Tomcat server that discloses its version information. An authenticated NetWorker server user with remote access to NetWorker clients can exploit this version disclosure to gather reconnaissance information for target-specific attacks against known Tomcat vulnerabilities.

MitigationDisable Apache Tomcat version disclosure by configuring the server to suppress version headers, or update NetWorker to a version that bundles a patched Tomcat configuration. Restrict remote access to trusted NetWorker users to reduce attack surface.

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
Emc NetworkerApplication
Affected:< 19.6

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

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 NetWorker installed version
    Run 'nsrversion -v' or look in the NetWorker installation directory for version information, or check the software package version installed
    Affected if The installed version is 19.5 or earlier (anything below 19.6)
  2. Identify Tomcat service endpoint
    Locate the embedded Apache Tomcat server by examining NetWorker service ports - typically ports 9000, 9001, or 8443 are used for the NetWorker web interface
    Affected if Tomcat is running on accessible ports without firewall restrictions
  3. Probe HTTP headers for version disclosure
    Send an HTTP request to the NetWorker server (e.g., curl -I https://hostname:port) and inspect Server and X-Powered-By headers
    Affected if The Server header reveals Apache Tomcat and its version number, or any X-Powered-By header contains Tomcat version info
  4. Check web response content for version strings
    Retrieve default error pages or root path (curl https://hostname:port/) and search for version strings like 'Apache Tomcat' followed by version numbers
    Affected if Version numbers appear in any web response from the Tomcat server

You are affected if NetWorker version is below 19.6 AND the embedded Tomcat server is exposing version information via HTTP headers or response content.

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 19.6 or later
Fixed in 19.6
Interim mitigation

Disable Apache Tomcat version disclosure by configuring the server to suppress version headers, or update NetWorker to a version that bundles a patched Tomcat configuration. Restrict remote access to trusted NetWorker users to reduce attack surface.

Recommended fix Moderate confidence

NetWorker 19.6 or later

  1. Backup current NetWorker configuration and database before any upgrade
  2. Download NetWorker version 19.6 or later from the Dell Support portal (www.dell.com/support)
  3. Review Dell NetWorker upgrade documentation for your specific deployment scenario
  4. Execute the upgrade installer on the NetWorker server
  5. Restart NetWorker services after upgrade completes
  6. Verify that Apache Tomcat version information is no longer disclosed by checking HTTP response headers from the NetWorker web interface
  7. Confirm NetWorker functionality and backup jobs are operating normally
Caveat Review Dell release notes for 19.6 to confirm no breaking changes affect your environment; test in staging if possible

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

Fix this in Emc Networker Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,090
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,744.

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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-2023-25544 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
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