Backdoor account in ABB CP651 HMI

1) Use of hard-coded credentials

EUVDB-ID: #VU19017

Risk: Medium

CVSSv4.0: 7.4 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2019-10995

CWE-ID: CWE-798 - Use of Hard-coded Credentials

Exploit availability: No

Description

The vulnerability allows an attacker to gain full access to vulnerable system.

The vulnerability exists due to the CP651 HMI component implements hidden administrative accounts that are used during the provisioning phase of the HMI interface. An unauthenticated attacker can prevent legitimate access to an affected system node, take control of it, or insert and run arbitrary code in an affected system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BSP UN30: All versions

PB610 Panel Builder 600: 1.91 - 2.8.0.367

CPE2.3

• cpe:2.3:a:abb:bsp_un30:*:*:*:*:*:*:*:*
• cpe:2.3:a:abb:pb610_panel_builder_600:1.91:*:*:*:*:*:*:*
• cpe:2.3:a:abb:pb610_panel_builder_600:2.8.0.367:*:*:*:*:*:*:*

External links

https://ics-cert.us-cert.gov/advisories/icsa-19-178-02
https://library.e.abb.com/public/b2edb894b46242fda29eb7644a068161/ABB-Advisory_3ADR010402.pdf

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).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.