CVE-2018-7712
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 · uneditedThe validateInputImageSize function in modules/imgcodecs/src/loadsave.cpp in OpenCV 3.4.1 allows remote attackers to cause a denial of service (assertion failure) because (size.height <= (1<<20)) may be false. Note: “OpenCV CV_Assert is not an assertion (C-like assert()), it is regular C++ exception which can raised in case of invalid or non-supported parameters.
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 confidenceThe validateInputImageSize function in OpenCV 3.4.1's imgcodecs module contains an assertion check that validates image height does not exceed 1<<20 (1,048,576 pixels). When processing a specially crafted image with height exceeding this limit, the CV_Assert exception is thrown, causing a denial of service via application crash. This affects the image loading and saving functionality.
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= 3.4.1CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 OpenCV versionRun 'pkg-config --modversion opencv' or check the library file name (libopencv_core.so.3.4.1) to identify the exact installed version of OpenCVAffected if The installed version is exactly 3.4.1
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Identify imgcodecs module usageCheck if your application links against libopencv_imgcodecs.so or uses cv::imread, cv::imwrite, cv::imdecode, or cv::imencode functions from the imgcodecs moduleAffected if The imgcodecs module is used for loading or saving images in your application
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Review application image processing pathsAudit your codebase for any image loading operations (cv::imread, cv::imdecode) that process untrusted image files from external sourcesAffected if Your application loads images from untrusted sources without first validating image dimensions
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Check for CV_Assert crash symptomsReview application crash logs for 'CV::Exception' or assertion failure errors related to image dimensions exceeding 1048576 pixelsAffected if Recent crashes match the pattern of CV_Assert in validateInputImageSize when processing large images
You are affected if OpenCV version 3.4.1 is installed and your application uses the imgcodecs module to process image files, particularly from untrusted sources.
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 a patched version of OpenCV that addresses the improper bounds checking in validateInputImageSize, or implement input validation on image dimensions before passing images to OpenCV functions.
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-7712 — 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-2018-7712 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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