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Insecure service configuration - App Backup

Description​

The application has the backup option active, which allows an attacker who has access to a users device to obtain the information stored by the application inside the device.

Impact​

Obtain confidential user and application information.

Recommendation​

Unless absolutely necessary, the application should not allow to backup itself.

Threat​

Anonymous attacker with local access to a users device.

Expected Remediation Time​

⌚ 15 minutes.

Score​

Default score using CVSS 3.1. It may change depending on the context of the vulnerability.

Base​

  • Attack vector: L
  • Attack complexity: H
  • Privileges required: N
  • User interaction: N
  • Scope: U
  • Confidentiality: L
  • Integrity: N
  • Availability: N

Temporal​

  • Exploit code madurity: X
  • Remediation level: O
  • Report confidence: X

Result​

  • Vector string: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:X
  • Score:
    • Base: 2.9
    • Temporal: 2.8
  • Severity:
    • Base: Low
    • Temporal: Low

Code Examples​

Compliant code​

The app manifest does not allow backup

<manifest ... >
  ...
  <application android:allowBackup="false" ... >
    ...
  </application>
</manifest>

Non compliant code​

The allowBackup option is set to true in the app manifest

<manifest ... >
  ...
  <application android:allowBackup="true" ... >
    ...
  </application>
</manifest>

Requirements​

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