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Insecure service configuration - Header Checking

Description​

The application disables the HeaderChecking property, which enables the encoding of newlines and carriage returns, thus allowing the injection of malicious headers

Impact​

Ease header injection attacks through newlines and carriage returns

Recommendation​

Set the EnableHeaderChecking property to true, of remove the line that sets the property in false, since its default value is true

Threat​

Anonymoous attacker from the Internet

Expected Remediation Time​

⌚ 20 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: R
  • Scope: U
  • Confidentiality: N
  • Integrity: L
  • Availability: N

Temporal​

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

Result​

  • Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
  • Score:
    • Base: 3.1
    • Temporal: 2.8
  • Severity:
    • Base: Low
    • Temporal: Low

Code Examples​

Compliant code​

The application correctly configures the EnableHeaderChecking

using System;
using System.Web.Configuration;

class TestClass {
  public void TestMethod() {
    HttpRuntimeSection httpRuntimeSection = new HttpRuntimeSection();
    httpRuntimeSection.EnableHeaderChecking = true;
  }
}

Non compliant code​

The application has the EnableHeaderchecking disabled

using System;
using System.Web.Configuration;

class TestClass {
  public void TestMethod() {
    HttpRuntimeSection httpRuntimeSection = new HttpRuntimeSection();
    httpRuntimeSection.EnableHeaderChecking = false;
  }
}

Requirements​