CVE-2017-17033
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 · uneditedA buffer overflow vulnerability in password function in QNAP QTS version 4.2.6 build 20171026, 4.3.3.0378 build 20171117, 4.3.4.0387 (Beta 2) build 20171116 and earlier could allow remote attackers to execute arbitrary code on NAS devices.
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 confidenceA buffer overflow vulnerability exists in the password function of QNAP QTS firmware versions 4.2.6, 4.3.3.0378, and 4.3.4.0387 and earlier. The overflow allows remote attackers to execute arbitrary code on affected NAS devices without authentication.
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<= 4.3.3.0378= 4.3.4.0358= 4.3.4.0370= 4.3.4.0372= 4.3.4.0374= 4.3.4.0387CVSS 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:3.0/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 QTS firmware version via web interfaceLog into the QNAP admin web console (port 8080 or 443). The version is displayed on the login page or in Control Panel > System > Firm Update. Alternatively, access the device via SSH and run: cat /etc/config/default/uBoot_versionAffected if The installed version matches any of: 4.2.6 or lower; 4.3.3.0378; 4.3.4.0358; 4.3.4.0370; 4.3.4.0372; 4.3.4.0374; or 4.3.4.0387
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Verify QTS version via command lineIf you have SSH/telnet access to the NAS, connect and run: cat /etc/uBoot_version OR cat /proc/xscale/hook/machine_name to retrieve the firmware versionAffected if The returned version matches the affected list in step 1
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Check if web admin interface is network-accessibleFrom an external host, attempt to reach the QNAP web interface: curl -k https://[NAS-IP]:443/ or curl -k http://[NAS-IP]:8080/. Also verify open ports using: nmap -p 80,443,8080,8081 [NAS-IP]Affected if The web admin ports (80, 443, 8080, 8081) are open and reachable from untrusted networks (e.g., the internet or untrusted LAN segments)
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Confirm if legacy HTTP service is enabledIn QTS web interface, go to Control Panel > System > General Settings > Security. Check if 'Allow HTTP connection' is enabled. Alternatively, check via CLI: grep -i http_port /etc/config/ss/ss.confAffected if HTTP (port 80) or legacy services handling password authentication are exposed to the network
You are affected if the QTS firmware version matches any of the listed affected versions AND the admin web interface or password-handling service is network-accessible from an untrusted location.
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-supplied firmware updates to all affected QNAP QTS devices. If patches are unavailable, consider network segmentation to limit exposure to untrusted networks.
- Consultation4.0 h
- Implementation6.0 h
- Testing2.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-17033 — 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-2017-17033 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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