External risk intelligence

SQL Injection Risk in Guestbook Software

CVE advisorySeverity: HIGH (CVSS 8.8)

CVE-2018-25411

MGB OpenSource Guestbook has an SQL injection vulnerability that allows unauthenticated attackers to extract sensitive database information. This poses a risk to data confidentiality and integrity for organizations using the software.

4Halo Surface Signal

SQL Injection

External exposure likelihood

Halo Surface Signal score for CVE-2018-25411

The vulnerable component is a guestbook application, a type of web software designed specifically to be publicly accessible on the internet to allow visitors to leave comments or messages. Given its primary function as a web-based guestbook, it is expected to be deployed as a public-facing web endpoint.

Horizon Alert

Summary of the vulnerability and why it matters

MGB OpenSource Guestbook, a web application component, is susceptible to a critical security flaw. This vulnerability allows unauthenticated attackers to inject malicious code through a specific parameter. The consequence of such an attack could lead to unauthorized access and extraction of sensitive database information, potentially exposing confidential business data.

  • Vulnerable component: Guestbook application
  • Core weakness: SQL injection flaw
  • Main business impact: Data exposure and unauthorized access

Attack Path

How an attacker could exploit the issue

MGB OpenSource Guestbook contains an SQL injection vulnerability that allows unauthenticated attackers to execute arbitrary SQL queries. Attackers can send GET requests to email.php with crafted SQL payloads in the 'id' parameter. This action can lead to the extraction of sensitive database information, such as table and column names, impacting the confidentiality of the stored data.

  • Exposure condition: Publicly accessible guestbook application.
  • Attacker starting point: Unauthenticated access via GET request.
  • Trigger and result: Inject SQL via 'id' parameter; extract database information.

Live Threat

Current exploitation, exposure, and threat context

The identified vulnerability in MGB OpenSource Guestbook could enable unauthorized individuals to manipulate the application's database. Attackers can exploit this by sending specially crafted requests to the `email.php` script, potentially accessing sensitive information. This type of attack poses a significant risk to data integrity and confidentiality.

  • Likely attacker skill: Low
  • Required access: Public internet access
  • Business risk: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

The identified vulnerability in MGB OpenSource Guestbook presents a risk of unauthorized access to sensitive database information. Attackers can exploit this by sending specially crafted requests to the email.php script, potentially leading to data extraction and compromise. Organizations using this software should prioritize understanding their exposure and mitigating the risk.

  • Identify all deployed instances.
  • Restrict network access to the application.
  • Apply vendor updates and confirm remediation.

Frequently asked questions

What is MGB OpenSource Guestbook and its primary function?

MGB OpenSource Guestbook is a web application component designed to serve as a guestbook. It provides a space on a website for visitors to leave messages or comments, facilitating user interaction and feedback collection.

How does the CVE-2018-25411 vulnerability manifest as an SQL injection?

This vulnerability is an SQL injection (CWE-89). Attackers can send a specially crafted GET request to the `email.php` file and insert malicious SQL code into the 'id' parameter. This allows them to execute arbitrary SQL commands, potentially reading sensitive data from the database.

What is the attack path for CVE-2018-25411?

Attackers can exploit this by sending GET requests to `email.php` with crafted SQL payloads within the 'id' parameter. This can lead to the extraction of sensitive database information, such as table and column names, impacting data confidentiality.

What is the relevance of this vulnerability, and how does Halo Surface Signal assess it?

The vulnerability is relevant because the MGB OpenSource Guestbook is a web application component. Halo Surface Signal assesses it as 'Likely' to be exposed externally, scoring it 4, due to its primary function as a publicly accessible, internet-facing guestbook.

What practical steps should be taken to respond to this vulnerability?

To respond, organizations should identify all deployed instances of MGB OpenSource Guestbook, restrict network access to the application where possible, and promptly apply any available vendor updates. Confirming that remediation efforts are successful is also crucial.

References