CVE-2017-16591
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 disclose sensitive information on vulnerable installations of NetGain Systems Enterprise Manager 7.2.699 build 1001. 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.restore.download_005fdo_jsp servlet, which listens on TCP port 8081 by default. When parsing the filename parameter, the process does not properly validate a user-supplied path prior to using it in file operations. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of Administrator. Was ZDI-CAN-5100.
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 confidenceNetGain Systems Enterprise Manager contains a path traversal vulnerability in the download_005fdo_jsp servlet on port 8081. The filename parameter is not validated before being used in file operations, allowing authenticated attackers (or those bypassing authentication) to read arbitrary files on the system. This can be chained with other vulnerabilities to achieve code execution 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= 7.2.699CVSS 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:3.0/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 checksWork through these to decide whether this CVE applies to you.
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Identify if NetGain Enterprise Manager is runningScan your network for services listening on port 8081 or check for NetGain processes on the system using 'netstat -ano | findstr :8081' or 'ps aux | grep -i netgain'Affected if Port 8081 is open and responding with NetGain application content
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Determine the installed versionCheck the NetGain application version through its web interface login page, about page, or check installed software metadata on the systemAffected if The installed version is exactly 7.2.699
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Verify the vulnerable servlet existsAttempt to access the download_005fdo_jsp endpoint by sending a request to http://target:8081/servlet/download_005fdo_jsp (note: the actual path may vary slightly)Affected if The servlet responds and accepts a filename parameter without validation
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Check authentication controls on the servletTest whether the download servlet can be accessed without authentication or after authentication to the systemAffected if The servlet is accessible without valid credentials or with any authenticated session
Your environment is affected if NetGain Enterprise Manager version 7.2.699 is running with the download servlet on port 8081 accessible (with or without authentication).
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 dataApply vendor patch or upgrade to a patched version. If unavailable, implement input validation and whitelist filtering on the filename parameter in the affected servlet and disable the service if unauthenticated access cannot be properly restricted.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-16591 — 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-2017-16591 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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- 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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