CVE-2023-21443
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 · uneditedImproper cryptographic implementation in Samsung Flow for Android prior to version 4.9.04 allows adjacent attackers to decrypt encrypted messages or inject commands.
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 confidenceSamsung Flow for Android had an improper cryptographic implementation that allowed adjacent attackers (within Bluetooth or WiFi range) to decrypt encrypted communications or inject malicious commands. The vulnerability was fixed in version 4.9.04.
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< 4.9.04CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/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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Verify Samsung Flow is installedOpen Android device Settings > Apps > Apps and look for 'Samsung Flow' in the installed applications list, or check the app drawer for the Samsung Flow iconAffected if Samsung Flow is present on the device and version cannot be determined or is below 4.9.04
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Check installed Samsung Flow versionOpen Android device Settings > Apps > Apps > Samsung Flow > App info, or open Samsung Flow and navigate to Settings > About Flow to view the version numberAffected if The displayed version number is lower than 4.9.04
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Verify version against affected rangeCompare the installed version found in step 2 against the affected range: versions earlier than 4.9.04 are vulnerableAffected if Installed version is any version before 4.9.04 (for example, 4.9.00, 4.8.x, or earlier)
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Confirm the app has been used for secure communicationsReview if Samsung Flow has been used to connect to a Windows PC or transfer sensitive data between device and computer, as the cryptographic flaw affects encrypted communicationsAffected if Samsung Flow was used for any paired device communication and the installed version is below 4.9.04
If Samsung Flow for Android is installed and the version is below 4.9.04, the device is affected by this vulnerability and may allow adjacent attackers to decrypt communications or inject commands via Bluetooth or WiFi proximity.
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 · scoped4.9.04
Update Samsung Flow for Android to version 4.9.04 or later. Ensure devices running Samsung Flow are not used in untrusted proximity environments until patched.
Samsung Flow version 4.9.04 for Android
- Open the Google Play Store app on your Android device
- Search for 'Samsung Flow'
- Tap on Samsung Flow from the search results
- Tap the 'Update' button to install version 4.9.04 or later
- Verify the update was successful by checking the app version in the app settings or store listing
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-21443 — 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-2023-21443 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