PT-2020-16827 · Ubiquiti · Unifi Controller+1

Published 2020-10-27 · Updated 2021-07-21 · CVE-2020-27888

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Ubiquiti UniFi Meshing Access Point UAP-AC-M version 4.3.21.11325 UniFi Controller version 6.0.28

Description An issue allows cached credentials to remain on an access point after it returns wirelessly from a disconnected state, potentially providing unintended network access.

Recommendations For Ubiquiti UniFi Meshing Access Point UAP-AC-M version 4.3.21.11325, consider resetting the device to clear cached credentials after a wireless reconnection. For UniFi Controller version 6.0.28, restrict access to sensitive areas of the network until a fix is available to prevent potential exploitation of the cached credentials issue.

Fix

Insufficiently Protected Credentials

Weakness Enumeration

CWE-459

CWE-522

Related Identifiers

CVE-2020-27888

Affected Products

Uap-Ac-M

Unifi Controller

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2020-27888 · Security Note
• https://community.ui.com/questions/Possible-authentication-bypass-for-access-into-LAN/7965adb2-5d70-4410-8467-4c7bec76bc00 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-27888 · Vendor Advisory