Skip to main content

Insecure service configuration - Signatures

Description

The application is signed with a V1 signing scheme, which makes it vulnerable to the Janus vulnerability in Android.

Impact

Precede a malicious DEX file to an APK file, without affecting its signature.

Recommendation

Securely configure the vulnerable service so that it can only be accessed by authorized users.

Threat

Unauthorized attacker from the Internet.

Expected Remediation Time

⌚ minutes.

Score

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

Base

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

Temporal

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

Result

  • Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N/E:P/RL:X/RC:X
  • Score:
    • Base: 3.1
    • Temporal: 3.0
  • Severity:
    • Base: Low
    • Temporal: Low

Compliant code

The application uses a secure signature

APKSigner:
V1_SIGNATURE: false
V2_SIGNATURE: true

Non compliant code

The application has the V1 signature enabled

APKSigner:
V1_SIGNATURE: true
V2_SIGNATURE: false

Requirements

Fixes

free trial

Search for vulnerabilities in your apps for free with our automated security testing! Start your 21-day free trial and discover the benefits of our Continuous Hacking Machine Plan. If you prefer a full service that includes the expertise of our ethical hackers, don't hesitate to contact us for our Continuous Hacking Squad Plan.