Authentication bypass in Emerson DeltaV

1) Authorization bypass

EUVDB-ID: #VU16938

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-19021

CWE-ID: CWE-592 - Authentication Bypass Issues

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to bypass authentication on the target system.

The vulnerability exists due to insufficient validation of user-supplied input. An adjacent unauthenticated attacker can supply a specially crafted script to bypass the authentication of a maintenance port of a service and cause a denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

DeltaV: 11.3.1 - R6

External links

http://ics-cert.us-cert.gov/advisories/ICSA-19-010-01

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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