// For flags

CVE-2021-22909

Ubiquiti Networks EdgeOS Improper Certificate Validation Remote Code Execution Vulnerability

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A vulnerability found in EdgeMAX EdgeRouter V2.0.9 and earlier could allow a malicious actor to execute a man-in-the-middle (MitM) attack during a firmware update. This vulnerability is fixed in EdgeMAX EdgeRouter V2.0.9-hotfix.1 and later.

Una vulnerabilidad encontrada en EdgeMAX EdgeRouter versión V2.0.9 y anteriores, podría permitir a un actor malicioso ejecutar un ataque de tipo man-in-the-middle (MitM) durante una actualización de firmware. Esta vulnerabilidad se corrigió en EdgeMAX EdgeRouter versiones V2.0.9-hotfix.1 y posteriores

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.

*Credits: awxylitol
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-01-06 CVE Reserved
  • 2021-05-20 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-10-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-295: Improper Certificate Validation
  • CWE-300: Channel Accessible by Non-Endpoint
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Ui
Search vendor "Ui"
 Edgemax Edgerouter Firmware
Search vendor "Ui" for product "Edgemax Edgerouter Firmware"
 <= 2.0.9
Search vendor "Ui" for product "Edgemax Edgerouter Firmware" and version " <= 2.0.9"
-
Affected
in Ui
Search vendor "Ui"
 Edgemax Edgerouter
Search vendor "Ui" for product "Edgemax Edgerouter"
--
Safe