CVE-2018-5789 : Exploit Details and Defense Strategies

A vulnerability has been found in Extreme Networks ExtremeWireless WiNG versions 5.x (prior to 5.8.6.9) and 5.9.x (before 5.9.1.3) that allows for a Remote, Unauthenticated XML Entity Expansion Denial of Service attack.

Understanding CVE-2018-5789

This CVE identifies a vulnerability in Extreme Networks ExtremeWireless WiNG versions 5.x and 5.9.x that can be exploited for a denial of service attack.

What is CVE-2018-5789?

This vulnerability enables attackers to launch a Remote, Unauthenticated XML Entity Expansion Denial of Service attack on the WiNG Access Point / Controller by manipulating XML entities within the Web User Interface.

The Impact of CVE-2018-5789

The vulnerability could result in a denial of service condition on the affected WiNG Access Point / Controller, disrupting network operations and potentially causing service outages.

Technical Details of CVE-2018-5789

ExtremeWireless WiNG versions 5.x (prior to 5.8.6.9) and 5.9.x (before 5.9.1.3) are affected by this vulnerability.

Vulnerability Description

An issue in the affected versions allows for a Remote, Unauthenticated XML Entity Expansion Denial of Service attack through crafted XML entities in the Web User Interface.

Affected Systems and Versions

Extreme Networks ExtremeWireless WiNG 5.x versions prior to 5.8.6.9
Extreme Networks ExtremeWireless WiNG 5.9.x versions before 5.9.1.3

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating XML entities within the Web User Interface, leading to a denial of service condition on the WiNG Access Point / Controller.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2018-5789.

Immediate Steps to Take

Apply security patches provided by Extreme Networks to mitigate the vulnerability.
Monitor network traffic for any suspicious activity that could indicate an ongoing attack.

Long-Term Security Practices

Regularly update and patch all network devices to protect against known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Extreme Networks has released patches to address the vulnerability in ExtremeWireless WiNG versions 5.x and 5.9.x. Ensure timely application of these patches to secure the network against exploitation.