CVE-2023-30866
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 · uneditedIn telephony service, there is a missing permission check. This could lead to local information disclosure with no additional execution privileges needed.
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 confidenceA missing permission check in the telephony service allows any local application to access sensitive telephony information without proper authorization. This represents a classic permission bypass vulnerability where the service fails to validate caller permissions before disclosing data.
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= 10.0CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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.
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Verify Android version is 10.0Check the device Settings > About Phone > Android version, or run 'getprop ro.build.version.release' via ADB shellAffected if The displayed version shows exactly 10.0 (API level 29)
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Confirm telephony service is presentCheck if the Phone app or telephony-related services are installed and accessible on the device. On Android, verify the 'com.android.phone' process or ' telephony' service is available in Settings > Apps or via 'dumpsys activity services' commandAffected if The telephony service process exists and is running on the device
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Identify if apps can access telephony data without runtime permissionTest by installing a third-party app without telephony permissions and attempt to access telephony information through content providers or service APIs. Review AndroidManifest.xml of the telephony service for missing android:permission attributes on content providers or service definitionsAffected if Apps without READ_PHONE_STATE or other telephony permissions can successfully query telephony data or call telephony service methods
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Check permission enforcement in telephony content providersUse 'dumpsys content' to inspect registered content providers in the telephony service. Look for providers with missing android:writePermission or android:readPermission attributes, or providers that bypass permission checks in their implementationAffected if Telephony content providers are exposed without proper permission enforcement or declare no read/write permission requirements
A device is affected if it runs Android version 10.0 and the telephony service allows unauthenticated or unauthorized apps to access sensitive telephony data without runtime permission validation.
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 dataImplement proper permission verification checks in the telephony service code to ensure only authorized callers with valid runtime permissions can access telephony data.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-30866 — 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-2023-30866 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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