dbcve.org
Camon Iclick FirmwareOperating system · Tecno Mobile

CVE-2019-15343

HIGH · 7.8 CVSS v3.1 Published 2019-11-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
80/100
Remediation priority · High
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
The Tecno Camon iClick Android device with a build fingerprint of TECNO/H633/TECNO-IN6:8.1.0/O11019/A-180409V96:user/release-keys contains a pre-installed platform app with a package name of com.lovelyfont.defcontainer (versionCode=7, versionName=7.0.8). This app contains an exported service named com.lovelyfont.manager.FontCoverService that allows any app co-located on the device to supply arbitrary commands via shell script to be executed as the system user that are triggered by writing an attacker-selected message to the logcat log. This app cannot be disabled by the user and the attack can be performed by a zero-permission app. Executing commands as the system user can allow a third-party app to video record the user's screen, factory reset the device, obtain the user's notifications, read the logcat logs, inject events in the Graphical User Interface (GUI), and obtains the user's text messages, and more. Executing commands as the system user can allow a third-party app to factory reset the device, obtain the user's notifications, read the logcat logs, inject events in the GUI, change the default Input Method Editor (IME) (e.g., keyboard) with one contained within the attacking app that contains keylogging functionality, and obtains the user's text messages, and more.

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 confidence

The Tecno Camon iClick Android device ships with a pre-installed system app (com.lovelyfont.defcontainer) containing an exported service (FontCoverService) that executes arbitrary shell commands supplied via logcat log messages as the system user. Any application on the device can exploit this zero-permission vulnerability to gain system-level privileges.

MitigationThis vulnerability requires a firmware update from Tecno to patch or remove the vulnerable pre-installed app, as users cannot disable or remove system apps. Until a patch is available, users should avoid installing untrusted applications.

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
Camon Iclick FirmwareOperating system
Affected:all versions

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

CVSS:3.1/AV:L/AC:L/PR:L/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. Identify device model
    Check the device settings or use 'getprop ro.product.model' to confirm the device is a Tecno Camon iClick
    Affected if Device model is Tecno Camon iClick or related variant
  2. Check for vulnerable package
    List installed packages using 'pm list packages' or check for 'com.lovelyfont.defcontainer' in the package list
    Affected if The package com.lovelyfont.defcontainer is present on the device
  3. Verify FontCoverService exists
    Use 'dumpsys package com.lovelyfont.defcontainer' to examine the app components and confirm FontCoverService is declared
    Affected if FontCoverService component is declared in the app manifest
  4. Confirm service is exported
    Inspect the service declaration in the app manifest or use 'dumpsys package' to check if the service has android:exported=true
    Affected if FontCoverService has android:exported set to true allowing any app to interact with it
  5. Check logcat command execution capability
    Attempt to write a test command to logcat and observe if FontCoverService processes it (requires a test app or ADB)
    Affected if The service reads and executes commands from logcat input without validation

If the device is a Tecno Camon iClick with the com.lovelyfont.defcontainer package and its FontCoverService is exported, the device is vulnerable to privilege escalation.

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

This vulnerability requires a firmware update from Tecno to patch or remove the vulnerable pre-installed app, as users cannot disable or remove system apps. Until a patch is available, users should avoid installing untrusted applications.

Fix this in Camon Iclick Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
4.0 hours of engineering $750
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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-2019-15343 in production — separate from our analysis above.

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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