CVE-2017-16594
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 · uneditedThis vulnerability allows remote attackers to create arbitrary files on vulnerable installations of NetGain Systems Enterprise Manager 7.2.730 build 1034. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the org.apache.jsp.u.jsp.db.save_005fimage_jsp servlet, which listens on TCP port 8081 by default. When parsing the id parameter, the process does not properly validate user-supplied data, which can allow for the upload of files. An attacker can leverage this vulnerability to execute code under the context of Administrator. Was ZDI-CAN-5117.
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 confidenceArbitrary file upload vulnerability in NetGain Enterprise Manager's db.save_image_jsp servlet on TCP port 8081. The id parameter lacks proper input validation, allowing authenticated attackers (via bypassable auth) to upload arbitrary files and execute code as Administrator.
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= 7.2.730CVSS 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
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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 checksWork through these to decide whether this CVE applies to you.
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Verify NetGain Enterprise Manager is runningScan for services listening on TCP port 8081 using 'netstat -an | grep 8081' or 'nmap -p 8081 <target>'Affected if A service is listening on port 8081
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Confirm installed versionAccess the web interface on port 8081 and check the application version in the About/Help section, or grep for version strings in the installation directory if accessibleAffected if The installed version is exactly 7.2.730
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Check db.save_image_jsp accessibilitySend a GET request to 'http://<target>:8081/db.save_image_jsp' and verify the endpoint responds (even with an error)Affected if The endpoint is accessible and returns a response
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Detect authentication bypassAttempt to access the upload functionality without valid credentials and observe if the request is processed rather than rejectedAffected if Unauthenticated requests to the upload endpoint are not properly rejected
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Look for suspicious uploaded filesSearch the web root directory (typically under the application's upload or image directory) for unfamiliar files with extensions like .jsp, .exe, .sh, or .asp using 'find <webroot> -type f -newer <install_date>'Affected if Unexpected script or executable files exist in the application directories
A user is affected if NetGain Enterprise Manager version 7.2.730 is running and exposed on port 8081 with the db.save_image_jsp endpoint accessible, regardless of authentication status.
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 dataRestrict network access to port 8081, implement proper file upload validation (whitelist allowed extensions/content-types), and fix the authentication bypass mechanism.
- Consultation6.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $9,600.
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Free · runs locallyCheck whether your project pulls in CVE-2017-16594 — 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-2017-16594 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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- Version or environment caveats, and links to real fixes
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