dbcve.org
AndroidOperating system · Google

CVE-2023-42655

MEDIUM · 6.7 CVSS v3.1 Published 2023-11-01
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
69/100
Remediation priority · Elevated
Zero-click

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 · unedited
In sim service, there is a possible way to write permission usage records of an app due to a missing permission check. This could lead to local escalation of privilege with System 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 confidence

A missing permission check in the Android SIM service allows a local attacker with System execution privileges to write permission usage records for any app, potentially enabling local privilege escalation. The vulnerability stems from the lack of proper authorization validation before allowing writes to permission usage data.

MitigationApply the vendor-specific security patch for CVE-2023-42655 from your device OEM or wait for Google's monthly security update that addresses this issue in the SIM service component.

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
AndroidOperating system
Affected:= 11.0

CVSS 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
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/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 checks

Work through these to decide whether this CVE applies to you.

  1. Verify Android version
    Go to Settings > About Phone > Android version or run 'getprop ro.build.version.release' via ADB shell
    Affected if The displayed version is exactly 11.0 (Android 11)
  2. Confirm SIM service presence
    Check if the device has a SIM card slot and SIM service is accessible. Run 'dumpsys isub' via ADB shell to see if the ISub service responds
    Affected if SIM service is present and operational on an Android 11.0 device
  3. Identify execution privilege level
    Run 'whoami' or 'id' via ADB shell to determine current process privileges. The vulnerability requires System-level execution privileges for exploitation
    Affected if The process or shell is running with System uid (uid 1000) or root (uid 0) privileges

You are affected if the device runs Android 11.0 exactly and an attacker has System-level execution privileges to interact with the SIM service's permission usage record functionality.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the vendor-specific security patch for CVE-2023-42655 from your device OEM or wait for Google's monthly security update that addresses this issue in the SIM service component.

Fix this in Android Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing10.0 h
  • Review / QA6.0 h
34.0 hours of engineering $5,940
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-42655 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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