CVE-2017-9531
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 · uneditedIrfanView version 4.44 (32bit) with FPX Plugin 4.46 allows attackers to execute arbitrary code or cause a denial of service via a crafted .fpx file, related to a "User Mode Write AV starting at FPX+0x000000000000176c."
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 confidenceA crafted FPX (FlashPix) image file triggers a user-mode write access violation in IrfanView's FPX plugin version 4.46, allowing attackers to overwrite memory and potentially execute arbitrary code or cause a denial of service.
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= 4.44= 4.46CVSS 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:L/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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Verify IrfanView versionOpen IrfanView, go to Help > About, or right-click the IrfanView executable and select Properties > Details to view the product versionAffected if The version is exactly 4.44 (as listed in affected versions)
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Verify FPX plugin versionOpen IrfanView, go to Help > About Plugins, or check the FPX plugin file (typically FPX.dll) in the IrfanView plugins folder for its version informationAffected if The FPX plugin version is exactly 4.46 (as listed in affected versions)
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Confirm FPX plugin is presentNavigate to the IrfanView plugins directory (commonly C:\Program Files\IrfanView\Plugins or similar) and verify that FPX.dll or a similar FPX-related plugin file existsAffected if The FPX plugin file exists and is loaded by IrfanView - the vulnerability only applies when the plugin is present and functional
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Test FPX file handling capabilityAttempt to open a .fpx file in IrfanView, or check IrfanView's registered file associations to see if .fpx files are associated with the applicationAffected if IrfanView can process .fpx files - the vulnerability is triggered when a user opens a crafted FPX file
You are affected if you have IrfanView version 4.44 or FPX plugin version 4.46 AND the FPX plugin is present and capable of opening files, regardless of whether you have opened a malicious file.
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 dataUpdate IrfanView and the FPX plugin to the latest versions; avoid opening untrusted .fpx files or disable the FPX plugin if not required.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-9531 — 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-2017-9531 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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