CVE-2021-30757
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 · uneditedThis issue was addressed by enabling hardened runtime. This issue is fixed in iMovie 10.2.4. Entitlements and privacy permissions granted to this app may be used by a malicious app.
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 confidenceiMovie 10.2.3 and earlier failed to enable hardened runtime, a macOS security feature that provides runtime protections. This allowed a malicious app to potentially access entitlements and privacy permissions granted to iMovie, potentially enabling unauthorized access to user data or system capabilities.
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< 10.2.4CVSS 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
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
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.
-
Check installed iMovie versionOpen Terminal and run: defaults read /Applications/iMovie.app/Contents/Info.plist CFBundleVersion or mdls -name kCFBundleVersionString /Applications/iMovie.appAffected if The version number returned is less than 10.2.4 (for example, 10.2.3, 10.2.2, etc.)
-
Check if hardened runtime is enabled for iMovieRun: codesign -dvvv /Applications/iMovie.app 2>&1 | grep -i runtimeAffected if The output does NOT contain 'runtime' or 'Hardened Runtime' - this indicates hardened runtime is not enabled
You are affected if iMovie version is below 10.2.4 AND the hardened runtime check shows it is not enabled, meaning the app lacks the runtime protection designed to prevent unauthorized access to its entitlements and privacy permissions.
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.
dbcve · scoped10.2.4
Ensure iMovie is updated to version 10.2.4 or later. For other macOS applications, enable hardened runtime during the build process via Xcode or by using the appropriate codesign flags.
iMovie 10.2.4
- Open the Mac App Store application on your macOS device
- Click on the 'Updates' tab in the navigation bar
- Locate iMovie in the list of available updates
- Click the 'Update' button next to iMovie to download and install version 10.2.4
- Alternatively, open the Apple menu > 'App Store' > 'Updates' to check for and install the iMovie update
- After installation, verify the version by opening iMovie and checking 'iMovie' > 'About iMovie' to confirm version 10.2.4
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation2.0 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 $1,664.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-30757 — 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-2021-30757 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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