CVE-2018-7713
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.width <= (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 confidenceOpenCV 3.4.1's validateInputImageSize function in the imgcodecs module contains an input validation flaw where images with width exceeding 1,048,576 pixels trigger a CV_Assert exception (C++ exception, not a standard assert). This causes a denial of service when processing maliciously crafted large images.
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:3.0/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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Identify installed OpenCV versionRun 'python3 -c "import cv2; print(cv2.__version__)"' or 'pkg-config --modversion opencv' or check your package managerAffected if The version returned is exactly 3.4.1
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Confirm imgcodecs module availabilityRun 'python3 -c "import cv2.imgcodecs"' or check if imgcodecs.dll/libopencv_imgcodecs.so exists in your OpenCV installationAffected if The imgcodecs module loads without errors
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Identify image processing entry pointsSearch your codebase for calls to cv2.imread, cv2.imwrite, cv2.imdecode, or cv::imread from the imgcodecs moduleAffected if Your application directly loads images from untrusted sources using OpenCV imgcodecs functions
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Check image source trust modelReview your application's image input handling: check if images come from user uploads, network sources, or untrusted file pathsAffected if Images processed by OpenCV originate from untrusted or external sources without prior dimension validation
You are affected if OpenCV version 3.4.1 is installed AND your application uses the imgcodecs module to process images from untrusted sources with widths exceeding 1,048,576 pixels, which will trigger the CV_Assert exception and cause denial of service.
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 implements proper error handling instead of assertions, or configure image processing pipelines to validate and reject oversized images before passing them to OpenCV functions.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2018-7713 — 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-2018-7713 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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