CVE-2018-11701
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 · uneditedFastStone Image Viewer 6.2 has a User Mode Write AV at 0x005cb509, triggered when the user opens a malformed JPEG file that is mishandled by FSViewer.exe. Attackers could exploit this issue for DoS (Access Violation) or possibly unspecified other impact.
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 confidenceFastStone Image Viewer 6.2 contains a memory corruption vulnerability in its JPEG parsing logic within FSViewer.exe. When processing a malformed JPEG file, the application triggers a User Mode Write Access Violation at a specific memory address, indicating an out-of-bounds write during image decoding. This allows denial of service via crash and potentially enables arbitrary code execution with user-level privileges.
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= 6.2CVSS 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
- 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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Locate FastStone Image Viewer installationSearch for FSViewer.exe in common installation directories such as C:\Program Files\FastStone Image Viewer\ or C:\Program Files (x86)\FastStone Image Viewer\, or check Start Menu shortcuts for the installation path.Affected if FastStone Image Viewer is found at any installation path.
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Check installed version numberRight-click on FSViewer.exe, select Properties, then view the Details tab to see the File Version or Product Version field.Affected if The version is listed as exactly 6.2.
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Confirm via Windows Programs and FeaturesOpen Control Panel > Programs and Features, locate FastStone Image Viewer in the list, and note the version column.Affected if The program is listed with version 6.2.
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Identify JPEG parsing usageThe vulnerability exists in the JPEG parsing logic of FSViewer.exe. Any use of the viewer to open JPEG files triggers the affected code path.Affected if The viewer is used to process JPEG images.
A system is affected if FastStone Image Viewer version 6.2 is installed and used to process JPEG files.
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 dataAvoid opening untrusted or malformed JPEG files in FastStone Image Viewer 6.2 until an official vendor patch is available. Consider using alternative image viewers or applying defense-in-depth measures such as sandboxing untrusted file processing.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2018-11701 — 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-2018-11701 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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