XML External Entity injection in Johnson Controls products - CVE-2020-9044

Vulnerability identifier: #VU25987

CSH Severity: High

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2020-9044

CWE-ID: CWE-611

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Johnson Controls

Affected software:
Metasys ADS
Metasys ADX
Metasys Open Data Server (ODS)
Metasys Open Application Server (OAS)
Metasys LonWorks Control Server (LCS)
Metasys Network Automation Engine (NAE55)
Metasys Network Integration Engine (NIE55)
Metasys Network Integration Engine (NIE59)
Metasys Network Automation Engine (NAE85)
Network Integration Engine (NIE85)
Metasys Smoke Control Network Automation Engine (NAE55)
Smoke Control Network Automation Engine (UL 864 UUKL/ORD-C100-13 UUKLC 10th Edition Listed)
Metasys System Configuration Tool (SCT)

The vulnerability allows a remote attacker to gain access to sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote attacker can pass a specially crafted XML code to the affected application and harvest ASCII files from the server.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or cause a denial of service condition on the target system.

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

• https://www.us-cert.gov/ics/advisories/icsa-20-070-05
• https://www.johnsoncontrols.com/-/media/jci/cyber-solutions/product-security-advisories/2020/jci-psa-2020_3-v1-microsoft_net-framework.pdf?la=en&hash=FFFFDCAB051B8EB3DA1C605C966F077F28AE1BD3