Vulnerability identifier: #VU57090

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38399

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Experion Process Knowledge System C200
Hardware solutions / Firmware
Experion Process Knowledge System C200E
Hardware solutions / Firmware
Experion Process Knowledge System C300 and ACE controllers
Hardware solutions / Firmware

Vendor: Honeywell International, Inc

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Experion Process Knowledge System C200: All versions

Experion Process Knowledge System C200E: All versions

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External links
http://ics-cert.us-cert.gov/advisories/icsa-21-278-04
http://www.honeywellprocess.com/library/support/notifications/Customer/SN2021-02-22-01-Experion-C300-CCL.pdf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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