Insecure service configuration - Signatures

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

⌚ 60 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 maturity: 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

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: H
  • Attack Requirements: N
  • Privileges required: N
  • User interaction: P
  • 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:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
  • Score:
    • CVSS-BT: 1.3
  • Severity:
    • CVSS-BT: 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

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