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QtsOperating system · Qnap

CVE-2017-17032

CRITICAL · 9.8 CVSS v3.0 Published 2017-12-21
Fix available
A fix is available. Upgrade to after 4.3.3.0378 or later.
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
A 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 confidence

Buffer overflow in the password function of QNAP QTS allows remote attackers to overflow a buffer via malformed password input, achieving arbitrary code execution on affected NAS devices.

MitigationApply vendor patches for QNAP QTS when released; until then, restrict network exposure of admin interfaces, disable remote access if not needed, and monitor for indicators of compromise.

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
QtsOperating system
Affected:<= 4.3.3.0378= 4.3.4.0358= 4.3.4.0370= 4.3.4.0372= 4.3.4.0374= 4.3.4.0387

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:3.0/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify QNAP QTS version via web interface
    Log into the QNAP admin web console and navigate to Control Panel > System > General Settings > Firmware Version to view the installed QTS version
    Affected if The displayed version matches <= 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
  2. Identify QNAP QTS version via command line
    Connect to the NAS via SSH and run the command 'grep -i 'QTS=' /etc/config/uLinux.conf' or 'cat /proc/bootinfo | grep Firmware' to retrieve the installed version
    Affected if The returned version matches any of the affected versions listed above
  3. Verify admin interface network exposure
    Check router/firewall rules or QNAP interface settings to determine if the admin web console (ports 80/443 or 8080/8081) is accessible from external networks or the internet
    Affected if The QNAP admin interface is exposed to untrusted networks, enabling remote attackers to reach the password function
  4. Check for unauthorized access indicators
    Review QNAP logs in Log Center for failed login attempts with unusually long password strings, or audit /var/log/audit for suspicious authentication patterns
    Affected if Logs show authentication attempts with malformed password input that may indicate exploitation attempts

A user is affected if their QNAP QTS version matches any of the listed affected versions AND the admin interface is network-accessible to potential attackers.

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.

dbcve · scoped
Upgrade available Upgrade to a release after 4.3.3.0378
Interim mitigation

Apply vendor patches for QNAP QTS when released; until then, restrict network exposure of admin interfaces, disable remote access if not needed, and monitor for indicators of compromise.

Recommended fix Moderate confidence

QTS version 4.3.4.0387_20171208 or later (specifically QTS 4.3.4.0387_20171208 resolves this vulnerability)

  1. 1. Log in to the QNAP NAS admin interface (QTS).
  2. 2. Navigate to Control Panel > System > Firmware Update.
  3. 3. Check for the latest available QTS firmware version.
  4. 4. If automatic update does not show version 4.3.4.0387_20171208 or later, manually download the firmware from the QNAP download center.
  5. 5. Upload and install the firmware update to apply the security patch.
Caveat Review QNAP release notes for QTS 4.3.4.0387 to check for any feature changes or known compatibility issues before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Qts Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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Scan for this in your stack

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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-2017-17032 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
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data