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Lack of data validation - Token

Description​

The generated JWT access token does not validate if the signature is valid so the token can be modified and requests are accepted; even removing the signature from the token works.

Impact​

  • Generate tokens by bypassing existing mechanisms.
  • Modify tokens allowing requests to be sent outside the application cycle.

Recommendation​

Generate a token with random components without sensitive information and always validate that the integrity of the token is maintained (signature verification, signature).

Threat​

Unauthorized attacker with access to a token.

Expected Remediation Time​

⌚ 90 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: N
  • Scope: U
  • Confidentiality: N
  • Integrity: L
  • Availability: N

Temporal​

  • Exploit code maturity: U
  • Remediation level: U
  • 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:U/RL:U/RC:C
  • Score:
    • Base: 3.7
    • Temporal: 3.4
  • 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: N
  • Confidentiality (VC): N
  • Integrity (VI): L
  • Availability (VA): N
  • Confidentiality (SC): N
  • Integrity (SI): N
  • Availability (SA): N

Threat 4.0​

  • Exploit maturity: U

Result 4.0​

  • Vector string: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
  • Score:
    • CVSS-BT: 1.7
  • Severity:
    • CVSS-BT: Low

Requirements​

Fixes​

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