CVE-2017-12704
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 heap-based buffer overflow issue was discovered in Advantech WebAccess versions prior to V8.2_20170817. Researchers have identified multiple vulnerabilities where there is a lack of proper validation of the length of user-supplied data prior to copying it to the heap-based buffer, which could allow an attacker to execute arbitrary code under the context of the process.
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 confidenceHeap-based buffer overflow vulnerability in Advantech WebAccess versions prior to V8.2_20170817. The software fails to properly validate the length of user-supplied data before copying it into a heap-allocated buffer, allowing an attacker to potentially execute arbitrary code with the privileges of the affected process.
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<= 8.2CVSS 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
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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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Confirm Advantech WebAccess installationLocate the WebAccess installation directory or check for WebAccess services running on the system. Common locations include C:\Program Files\Advantech\WebAccess or the installation path chosen during setup.Affected if Advantech WebAccess software is present on the system.
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Determine installed WebAccess versionRetrieve the version number from the WebAccess software. This is typically available through: the About dialog within the WebAccess dashboard, version properties of the main executable files, or the version information in the installation directory.Affected if The installed version cannot be determined or is <= 8.2 (prior to V8.2_20170817).
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Compare version against vulnerable rangeVerify the exact version string against the affected range. The vulnerability affects all versions prior to V8.2_20170817. Note the full version number including any build or date identifiers.Affected if The installed version is WebAccess V8.2 or any version prior to V8.2_20170817.
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Assess network exposureDetermine if the WebAccess web interface is accessible from untrusted networks. Check firewall rules, NAT configurations, and any port forwarding that exposes the WebAccess ports (typically TCP 80/443) to external access.Affected if The WebAccess interface is reachable from untrusted or public networks without proper access controls.
The system is affected if Advantech WebAccess version 8.2 or earlier (prior to V8.2_20170817) is installed and the software is accessible to potential attackers.
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 to WebAccess version V8.2_20170817 or later to obtain the vendor patch. As a compensating control, restrict network access to the affected system and apply least-privilege principles to limit exposure.
- Consultation6.0 h
- Implementation12.0 h
- Testing10.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-12704 — 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-2017-12704 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
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