CVE-2017-8793 : Security Advisory and Response

A vulnerability has been identified on Accellion FTA devices prior to version FTA_9_12_180 that allows attackers to bypass the Same Origin Policy.

Understanding CVE-2017-8793

This CVE involves exploiting a specific parameter to gain unauthorized access to Accellion FTA devices.

What is CVE-2017-8793?

This CVE refers to a security flaw in Accellion FTA devices before version FTA_9_12_180 that enables attackers to bypass security restrictions and access the site.

The Impact of CVE-2017-8793

Exploiting this vulnerability allows attackers to bypass the Same Origin Policy and gain unauthorized access to the affected site.

Technical Details of CVE-2017-8793

This section provides more technical insights into the vulnerability.

Vulnerability Description

By submitting a POST request to a specific URL with a controlled domain in a parameter, attackers can manipulate the device to return an Access-Control-Allow-Origin header, facilitating unauthorized access.

Affected Systems and Versions

Product: Accellion FTA devices
Versions affected: Prior to FTA_9_12_180

Exploitation Mechanism

Attackers exploit the 'acallow' parameter with a domain they control to trick the device into returning an Access-Control-Allow-Origin header.

Mitigation and Prevention

Protecting systems from CVE-2017-8793 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Accellion FTA devices to version FTA_9_12_180 or newer.
Monitor and restrict access to the vulnerable endpoint.

Long-Term Security Practices

Regularly audit and patch web applications and devices.
Implement strict input validation and security controls.

Patching and Updates

Apply security patches provided by Accellion promptly.