CVE-2017-9918
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 TOOLS Plugin 4.50 might allow attackers to cause a denial of service or execute arbitrary code via a crafted file, related to "Data from Faulting Address controls Branch Selection starting at KERNELBASE!QueryOptionalDelayLoadedAPI+0x0000000000000c42."
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 confidenceIrfanView 4.44 (32-bit) with TOOLS Plugin 4.50 contains a memory corruption vulnerability triggered by opening a specially crafted file. The vulnerability allows attackers to control branch selection (a form of control flow hijacking) via data at a faulting address, potentially leading to arbitrary code execution or 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= 4.50CVSS 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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Check installed IrfanView versionOpen IrfanView and go to Help > About, or right-click the IrfanView executable and view Properties > Details to see the version numberAffected if Version is exactly 4.44 (32-bit installation)
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Verify TOOLS Plugin versionOpen IrfanView and go to Image > Information, or check the plugins folder (typically \Program Files\IrfanView\Plugins\) for the tools.dll file versionAffected if TOOLS Plugin version is exactly 4.50
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Confirm 32-bit installationCheck the installation directory path: 32-bit versions are typically in \Program Files (x86)\IrfanView\ on 64-bit Windows, or verify the executable is i_view32.exe (32-bit) vs i_view64.exe (64-bit)Affected if The installed executable is i_view32.exe (32-bit)
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Identify attack surfaceCheck if the software is configured to automatically open files or if users commonly open untrusted image files directlyAffected if Users open image files from untrusted sources using the affected IrfanView installation
The environment is affected only if both IrfanView 4.44 (32-bit) and TOOLS Plugin version 4.50 are installed together; either version mismatch means not vulnerable to this specific CVE.
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 all plugins to the latest versions, or restrict access to untrusted image files and disable automatic file previewing in the affected software.
- Consultation1.0 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 $1,376.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-9918 — 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-2017-9918 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
- No spam, self-promotion, credentials, or personal data