Authentication mechanism absence or evasion - BIOS

Authentication mechanism absence or evasion - BIOS

Description

The system lacks an authentication mechanism or has one that can be bypassed. Therefore, an attacker can access system resources by logging into the BIOS.

Impact

- Access disk information through other systems.
- Modify and disabling machine configurations.
- Delete all machine information by formatting the disk.

Recommendation

Put in place for every resource with business-critical functionality a strong authentication process and ensure that every user attempting to access it is logged in.

Threat

Unauthorized internal attacker.

Expected Remediation Time

⌚ 120 minutes.

Score

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

Base

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

Temporal

  • Exploit code maturity: X
  • Remediation level: X
  • Report confidence: X

Result

  • Vector string: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
  • Score:
    • Base: 6.8
    • Temporal: 6.8
  • Severity:
    • Base: Medium
    • Temporal: Medium

Score 4.0

Default score using CVSS 4.0. It may change depending on the context of the src.

Base 4.0

  • Attack vector: P
  • Attack complexity: L
  • Attack Requirements: N
  • Privileges required: N
  • User interaction: N
  • Confidentiality (VC): H
  • Integrity (VI): H
  • Availability (VA): H
  • Confidentiality (SC): N
  • Integrity (SI): N
  • Availability (SA): N

Threat 4.0

  • Exploit maturity: X

Result 4.0

  • Vector string: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X
  • Score:
    • CVSS-BT: 7.0
  • Severity:
    • CVSS-BT: High

Compliant code

The application restricts access to sensitive resources only to authorized users

                app.post('/accessAdmin', hashedSentCode, function(req, res, next){
  User.register({ _id: req.user.id}, req.body, function(err, user){
    //Validating user has privileges and is correctly logged in
    if (req.body.isLoggedIn && user.isSuperAdmin){
      run userMFA();
      user.allowBIOSAccess = True;
    }
    res.redirect('/profile/BIOSManager');
  }
});

            

Non compliant code

The application allows access to BIOS without verifying permissions and secure authentication

                app.post('/accessAdmin', function(req, res, next){
  User.register({ _id: req.user.id}, req.body, function(err, user){
    user.allowBIOSAccess = True;
    res.redirect('/profile/BIOSManager');
  }
});

            

Requirements

Fixes

Free trial message
Free trial
Search for vulnerabilities in your apps for free with Fluid Attacks' automated security testing! Start your 21-day free trial and discover the benefits of the Continuous Hacking Essential plan. If you prefer the Advanced plan, which includes the expertise of Fluid Attacks' hacking team, fill out this contact form.