Description

The application does not have a control that detects if it is being used in an emulator, allowing a wider surface for reverse engineering.

Impact

Apply reverse engineer to the application.

Recommendation

Implement recommended security controls for mobile applications.

Threat

Anonymous attacker from the Internet.

Expected Remediation Time

⌚ 120 minutes.

Score

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

Base

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

Temporal

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

Result

• Vector string: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:X
• Score:
• Base: 2.4
• Temporal: 2.3
• Severity:
• Base: Low
• Temporal: Low

Score 4.0

Default score using CVSS 4.0. It may change depending on the context of the src.

Base 4.0

• Attack vector: P
• Attack complexity: L
• Attack Requirements: N
• Privileges required: N
• User interaction: N
• Confidentiality (VC): L
• Integrity (VI): N
• Availability (VA): N
• Confidentiality (SC): N
• Integrity (SI): N
• Availability (SA): N

Threat 4.0

• Exploit maturity: X

Result 4.0

• Vector string: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X
• Score:
• CVSS-BT: 2.4
• Severity:
• CVSS-BT: Low

Compliant code

The methods used to check if the app is being run on an emulator should be as strong as possible given current techniques

                private boolean isEmulator() {
return (Build.BRAND.startsWith("generic") && Build.DEVICE.startsWith("generic"))
        || Build.FINGERPRINT.startsWith("generic")
        || Build.FINGERPRINT.startsWith("unknown")
        || Build.HARDWARE.contains("goldfish")
        || Build.HARDWARE.contains("ranchu")
        || Build.MODEL.contains("google_sdk")
        || Build.MODEL.contains("Emulator")
        || Build.MODEL.contains("Android SDK built for x86")
        || Build.MANUFACTURER.contains("Genymotion")
        || Build.PRODUCT.contains("sdk_google")
        || Build.PRODUCT.contains("google_sdk")
        || Build.PRODUCT.contains("sdk")
        || Build.PRODUCT.contains("sdk_x86")
        || Build.PRODUCT.contains("sdk_gphone64_arm64")
        || Build.PRODUCT.contains("vbox86p")
        || Build.PRODUCT.contains("emulator")
        || Build.PRODUCT.contains("simulator");
}

            

Non compliant code

Source code does not sufficiently check if the app is being run on an emulator

                private boolean isEmulator() {
  return (Build.BRAND.startsWith("generic") && Build.DEVICE.startsWith("generic"))
}

            

Requirements

• 062.Define standard configurations
• 266.Disable insecure functionalities
• 273.Define a fixed security suite

Fixes

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