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Insufficient data authenticity validation - JAR signing

Description

The JAR files that compose the application are not correctly signed, allowing an attacker to modify the code withouth raising alerts on an integrity check.

Impact

Inject malicious code in the application without raising alerts.

Recommendation

Sign the application JAR files using a trusted key.

Threat

Anonymous attacker from Internet with access to the JAR Files.

Expected Remediation Time

⌚ 90 minutes.

Score

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

Base

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

Temporal

  • Exploit code madurity: X
  • Remediation level: O
  • Report confidence: C

Result

  • Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C
  • Score:
    • Base: 3.7
    • Temporal: 3.6
  • Severity:
    • Base: Low
    • Temporal: Low

Code Examples

Compliant code

Sign all the JAR files of the application with a certified key tool

jarsigner -keystore NONE -certchain "bundle.pem" -tsa "http://time.certum.pl" -storetype PKCS11
  -providerClass sun.security.pkcs11.SunPKCS11 -providerArg "provider.cfg"
  -storepass "[your_pin]" "[your_code].jar" "[your_alias]"

Non compliant code

The source code has .jar files that were not signed before runtime, please check to verify before compiling

Requirements