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Northstar Club ManagementApplication · Globalnorthstar

CVE-2021-29393

CRITICAL · 9.8 CVSS v3.1 Published 2022-02-04
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
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
Remote Code Execution in cominput.jsp and comoutput.jsp in Northstar Technologies Inc NorthStar Club Management 6.3 allows remote unauthenticated users to inject and execute arbitrary system commands via the unsanitized user-controlled "command" and "commandvalues" parameters.

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

Command injection vulnerability in NorthStar Club Management 6.3 allows unauthenticated remote attackers to execute arbitrary OS commands through unsanitized 'command' and 'commandvalues' parameters in cominput.jsp and comoutput.jsp. The vulnerable JSP files directly pass user input to system command execution functions without sanitization or validation.

MitigationImplement strict input validation using allowlists and refactor code to avoid direct system command execution. If system calls are required, use parameterized approaches or sandboxing. Apply vendor patch if available.

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
Northstar Club ManagementApplication
Affected:= 6.3

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

CVSS:3.1/AV:N/AC:L/PR:N/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. Identify NorthStar Club Management installation
    Search the web server filesystem for files named 'cominput.jsp' and 'comoutput.jsp', or look for the 'Northstar Club Management' application directory under the web root (typically under /northstar, /club, or similar paths)
    Affected if The application directory contains cominput.jsp and/or comoutput.jsp files and the software is identified as NorthStar Club Management version 6.3
  2. Verify installed version
    Check the application version through the web interface footer, any about/identification page, or examine version strings in JAR/WAR files or configuration files within the application directory
    Affected if The installed version is exactly 6.3 (version 6.3 is specifically listed as affected)
  3. Inspect vulnerable parameter handling
    Examine the source code of cominput.jsp and comoutput.jsp for direct use of request parameters 'command' or 'commandvalues' passed to Runtime.exec(), ProcessBuilder, or similar system command execution methods without sanitization
    Affected if The JSP files contain unsanitized parameter passing to system command execution functions using the 'command' or 'commandvalues' parameters
  4. Confirm web exposure
    Verify the JSP files are accessible via HTTP/HTTPS on the web server (try accessing the direct URLs such as /cominput.jsp or /comoutput.jsp)
    Affected if The vulnerable JSP files are accessible over the network and accept user-supplied input through the 'command' or 'commandvalues' parameters

A system is affected if NorthStar Club Management version 6.3 is installed and the cominput.jsp/comoutput.jsp files are present and exposed via web, with unsanitized 'command' or 'commandvalues' parameters being passed to system command execution functions.

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 strict input validation using allowlists and refactor code to avoid direct system command execution. If system calls are required, use parameterized approaches or sandboxing. Apply vendor patch if available.

Fix this in Northstar Club Management Scoped from the published advisory
  • Consultation8.0 h
  • Implementation12.0 h
  • Testing8.0 h
  • Review / QA6.0 h
34.0 hours of engineering $6,040
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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-2021-29393 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
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