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Missing secure obfuscation - APK

Description​

It is possible to obtain source code of the application because it has not been obfuscated using a secure mechanism. This could allow an attacker to understand the inner workings of the application or get technical or sensitive information.

Impact​

Get technical or sensitive information from the applications source code.

Recommendation​

Obfuscate the applications source code at deploy time with tools like: https://github.com/ClaudiuGeorgiu/Obfuscapk in its strongest configuration.

Threat​

Unauthorized attacker from Internet network with access to the APK.

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

Temporal​

  • Exploit code maturity: P
  • Remediation level: O
  • Report confidence: C

Result​

  • Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
  • Score:
    • Base: 5.3
    • Temporal: 4.8
  • Severity:
    • Base: Medium
    • Temporal: Medium

Score 4.0​

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

Base 4.0​

  • Attack vector: N
  • 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: P

Result 4.0​

  • Vector string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
  • Score:
    • CVSS-BT: 5.5
  • Severity:
    • CVSS-BT: Medium

Compliant code​

The code is correctly obfuscated using relevant secure tools

//Rename Obfuscation method
private void calculatePay(a b){
  while(b.c()){
    b.a(true);
    c.a();
    b(c);
  }
}

Non compliant code​

The source code was not obfuscated before compiling

//Code before obfuscation
private void calculatePay(SpecialList clientGroup){
  while(clientGroup.HasMore()){
    clientGroup.getNext(true);
    client.updatePay();
    makePay(client);
  }
}

Requirements​

Fixes​

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