CVE-2023-30938
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 a local attacker to access sensitive information without requiring any elevated privileges. The vulnerability stems from an authorization gap where certain telephony operations or data can be accessed without proper permission validation.
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= 10.0= 11.0= 12.0= 13.0CVSS 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.
-
Identify Android versionGo to Settings > About Phone > Android version, or run 'getprop ro.build.version.release' via ADB shellAffected if The version displayed is 10.0, 11.0, 12.0, or 13.0 exactly
-
Verify telephony service is presentCheck if the telephony service is accessible on the device by examining running services via 'dumpsys telephony.registry' or checking service listAffected if Telephony service is running and responds to queries
-
Confirm permission model configurationReview the device's permission configuration for telephony-related access by examining '/data/system/packages.xml' or using 'pm list permissions' to see telephony permissionsAffected if Telephony permissions exist in the permission registry but may not be enforced on vulnerable code paths
-
Review telephony access logsCheck logcat output for telephony service access patterns: 'logcat -b events | grep -i telephony' or examine security logs for any unauthorized telephony data access attemptsAffected if There are any telephony service calls from applications without appropriate telephony permissions
-
Check for sensitive telephony data exposureAttempt to query telephony information through the service API without holding telephony permissions, observing if sensitive data (call logs, SIM info, carrier details) is returnedAffected if Sensitive telephony data is accessible without proper permission validation
A user is affected if their device runs Android 10.0, 11.0, 12.0, or 13.0 and the telephony service returns sensitive information without enforcing proper permission checks.
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 checks in the telephony service code paths that handle sensitive information, ensuring all access requires appropriate user permissions.
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,096.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-30938 — 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-2023-30938 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