CVE-2018-0250 : What You Need to Know

A vulnerability has been discovered in Cisco Aironet series access points (APs) that could allow an attacker to bypass access control lists. The affected models include 1560, 1810, 1810w, 1815, 1830, 1850, 2800, and 3800.

Understanding CVE-2018-0250

This CVE identifies a security flaw in Cisco Aironet Access Points that could be exploited by an authenticated attacker in close proximity to the AP.

What is CVE-2018-0250?

The vulnerability in Central Web Authentication (CWA) with FlexConnect Access Points allows an attacker to bypass a configured FlexConnect access control list (ACL) by exploiting the AP's failure to recognize ACL downloads during authentication.

The Impact of CVE-2018-0250

If successfully exploited, the attacker can bypass a configured client FlexConnect ACL, compromising network security.

Technical Details of CVE-2018-0250

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from the AP's failure to recognize ACL downloads during authentication, enabling an attacker to bypass configured client FlexConnect ACLs.

Affected Systems and Versions

Cisco Aironet Access Points models 1560, 1810, 1810w, 1815, 1830, 1850, 2800, and 3800
Devices running a vulnerable version of Central Web Authentication with FlexConnect Access Points Software

Exploitation Mechanism

Attacker needs to be authenticated and in close proximity to the AP
Exploitation requires a vulnerable configuration on the targeted device

Mitigation and Prevention

Protect your systems from CVE-2018-0250 with these steps:

Immediate Steps to Take

Update to a non-vulnerable version of Central Web Authentication with FlexConnect Access Points Software
Implement network segmentation to limit attacker proximity

Long-Term Security Practices

Regularly monitor and update network security configurations
Conduct security training for staff on identifying and reporting suspicious activities

Patching and Updates

Apply patches provided by Cisco to address the vulnerability