Lack of data validation - Host Header Injection

Description

The application allows to manipulate the host header which may lead to unintended redirects to malicious websites.

Impact

Redirect the user to harfmful websites.

Recommendation

Validate the host header against a whitelist of trusty domains.

Threat

Anonymous attacker from adjacent network.

Expected Remediation Time

⌚ minutes.

Score

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

Base

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

Temporal

• Exploit code madurity: H
• Remediation level: U
• Report confidence: C

Result

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

Requirements

• 173.Discard unsafe inputs
• 320.Avoid client-side control enforcement
• 342.Validate request parameters

Fixes

• Elixir
• Scala
• Python
• Ruby
• Go
• Java
• C-Sharp
• PHP
• TypeScript

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