External risk intelligence

Delta SQL Arbitrary File Upload Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2018-25412

An arbitrary file upload vulnerability affects Delta Sql, allowing unauthenticated attackers to upload and execute malicious files. This can lead to remote code execution, posing a business risk of system compromise and data breaches.

4Halo Surface Signal

Missing Authentication

Deltasql Project Deltasql

1.8.2

External exposure likelihood

Halo Surface Signal score for CVE-2018-25412

The vulnerability exists in a web application accessible via HTTP POST requests to a PHP endpoint. As a web application, it is commonly deployed to be accessible over the network, and the specific function involved is a file upload feature that is typically intended to be reachable by users.

Horizon Alert

Summary of the vulnerability and why it matters

Delta Sql 1.8.2 has a vulnerability that allows unauthorized attackers to upload harmful files. This occurs when an attacker sends a specially crafted request to a specific upload function. Successful exploitation enables an attacker to execute arbitrary code on the server.

  • Vulnerable component: Delta Sql 1.8.2
  • Core weakness: Arbitrary file upload
  • Main business impact: Remote code execution

Attack Path

How an attacker could exploit the issue

An arbitrary file upload vulnerability in Delta Sql 1.8.2 could allow attackers to gain control of a server. The vulnerability exists in the docs_upload.php script, which processes file uploads. By sending a specially crafted POST request, an unauthenticated attacker can upload a malicious PHP file. This uploaded file can then be executed on the server, potentially leading to remote code execution and full system compromise.

  • Exposed web application.
  • Unauthenticated attacker uploads PHP file.
  • Remote code execution and control.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability allows unauthenticated attackers to upload and execute malicious files on a server. Such an attack could lead to unauthorized remote code execution, potentially compromising the entire system. This poses a significant business risk due to the potential for data breaches, service disruptions, and complete system compromise.

  • Likely attacker skill level: Low
  • Required access or conditions: Network access
  • Business risk or urgency: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

Delta Sql versions prior to 1.8.2 contain an arbitrary file upload vulnerability. Attackers can exploit this by sending specially crafted requests to the `docs_upload.php` file. This allows them to upload malicious files to the server, potentially leading to remote code execution and significant business risk.

  • Identify systems running Delta Sql.
  • Restrict access to `docs_upload.php`.
  • Apply vendor updates and validate.
  • Monitor for related activity.

Frequently asked questions

What is Delta SQL and its purpose, according to threat advisories?

Delta SQL is identified as a software project with a specific component, version 1.8.2, that contains a vulnerability. It is used for processing document uploads through a script named `docs_upload.php`.

How does CVE-2018-25412 enable arbitrary file upload?

CVE-2018-25412 is classified as an arbitrary file upload vulnerability. An attacker can exploit this by uploading a malicious PHP file to the server via the `docs_upload.php` script, which can then be executed for remote code execution.

What are the necessary conditions for an attacker to exploit this vulnerability?

Exploitation requires an attacker to send a specially crafted multipart form data POST request to the `docs_upload.php` script. This allows an unauthenticated attacker to upload a malicious PHP file to the designated upload directory on the server.

What is the significance of this vulnerability as per Halo Surface Signal?

The vulnerability is rated as 'Likely' due to its presence in a web application accessible via HTTP POST requests to a PHP endpoint, making it commonly reachable over the network by users through its file upload feature.

What practical steps can be taken to address the Delta SQL vulnerability?

To mitigate this risk, identify all systems running Delta SQL, restrict access to the `docs_upload.php` script, apply any available vendor updates, and implement continuous monitoring for suspicious related activity.

References