CVE-2021-27657 Information

Description

Successful exploitation of this vulnerability could give an authenticated Metasys user an unintended level of access to the server file system allowing them to access or modify system files by sending specifically crafted web messages to the Metasys system. This issue affects: Johnson Controls Metasys version 11.0 and prior versions.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://us-cert.gov/ics/advisories https://www.johnsoncontrols.com/cyber-solutions/security-advisories https://us-cert.cisa.gov/ics/advisories/icsa-21-159-01

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8