#VU57091 Missing Authentication for Critical Function in Emerson products - CVE-2021-85337

Vulnerability identifier: #VU57091

Vulnerability risk: Medium

CVSSv4.0: 5.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-85337

CWE-ID: CWE-306

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WirelessHART 1410 Gateway
Hardware solutions / Firmware
WirelessHART 1410D Gateway
Hardware solutions / Firmware
WirelessHART 1420 Gateway
Hardware solutions / Firmware

Vendor: Emerson

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to a missing permission validation on system backup restore. A remote authenticated attacker can take over account and change settings.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WirelessHART 1410 Gateway: before 4.7.105

WirelessHART 1410D Gateway: before 4.7.94

WirelessHART 1420 Gateway: before 4.7.94

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External links
https://ics-cert.us-cert.gov/advisories/icsa-21-278-02

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.