#VU16938 Authorization bypass in DeltaV - CVE-2018-19021

Vulnerability identifier: #VU16938

Vulnerability risk: Medium

CVSSv4.0: 5.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-19021

CWE-ID: CWE-592

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
DeltaV
Hardware solutions / Firmware

Vendor: Emerson

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: R5.1 - 14.3

---

External links
https://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.