Advisory Details

May 20th, 2021

Ubiquiti Networks EdgeOS Improper Certificate Validation Remote Code Execution Vulnerability

CVE ID	CVE-2021-22909
CVSS SCORE	7.5, AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Ubiquiti Networks
AFFECTED PRODUCTS	EdgeOS
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ubiquiti Networks EdgeOS on EdgeRouter X, EdgeRouter Pro X SFP, EdgeRouter 10X and EdgePoint 6-port routers. User interaction is required to exploit this vulnerability in that an administrator must perform a firmware update on the device. The specific flaw exists within the downloading of firmware files via HTTPS. The issue results from the lack of proper validation of the certificate presented by the server. An attacker can leverage this vulnerability to execute code in the context of root.
ADDITIONAL DETAILS	Ubiquiti Networks has issued an update to correct this vulnerability. More details can be found at: https://community.ui.com/releases/Security-Advisory-Bulletin-018-018/cfa1566b-4bf8-427b-8cc7-8cffba3a93a4
DISCLOSURE TIMELINE	2021-01-06 - Vulnerability reported to vendor 2021-05-20 - Coordinated public release of advisory
CREDIT	awxylitol

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