CVE-2023-42495
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 · uneditedDasan Networks - W-Web versions 1.22-1.27 - CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
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 confidenceDasan Networks W-Web versions 1.22 through 1.27 contain an OS Command Injection vulnerability (CWE-78) that allows attackers to execute arbitrary operating system commands on the affected system. The vulnerability stems from improper neutralization of special elements in user input that is passed to system shell commands, likely in a web-facing interface.
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>= 1.22, <= 1.27CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Identify Dasan Networks W-Web installationLocate the W-Web application on the system by checking for web server directories, service listings, or process information containing 'W-Web', 'Dasan', or 'wweb' identifiers.Affected if Dasan Networks W-Web software is found running on the system
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Determine installed W-Web versionAccess the web application admin interface, check configuration files, or use any available version disclosure mechanism (such as HTTP headers, about pages, or configuration endpoints) to identify the exact version number.Affected if The installed version is 1.22, 1.23, 1.24, 1.25, 1.26, or 1.27
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Compare version against affected rangeCompare the identified version number against the known vulnerable range: 1.22 <= version <= 1.27.Affected if The version falls within the range of 1.22 through 1.27 inclusive
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Verify web-facing exposureCheck network configuration, firewall rules, or web server bindings to determine if the W-Web interface is accessible from network segments other than localhost/internal networks.Affected if The W-Web interface is exposed to untrusted network segments or the public internet
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Inspect for command injection entry pointsReview web application logs, proxy configurations, or traffic captures to identify if user-supplied parameters are being passed to system shell execution functions without sanitization.Affected if User input from web requests is being directly incorporated into OS command calls
A system is affected if Dasan Networks W-Web version 1.22 through 1.27 is installed and the web interface processes user input into OS commands without proper sanitization.
Generated from the published advisory. Verify against your own configuration.
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 dataUpgrade W-Web to a version beyond 1.27 if available, or implement strict input validation and sanitization on all user-supplied data before passing it to any OS command execution functions. Consider using parameterized APIs instead of shell commands where possible.
- Consultation8.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-42495 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-42495 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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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.
- 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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