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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 vulnerability.

Base

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

Temporal

  • Exploit code madurity: 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

Code Examples

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