Backdoor account in ABB CP635 HMI

1) Use of hard-coded credentials

EUVDB-ID: #VU19010

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-2019-7225

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 presence of hard-coded credentials in code, which are IdalMaster:idal123 and exor:exor. An attacker can use these credentials to login to ABB HMI to read/write HMI configuration files and also to reset the device.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BSP UN31: All versions

BSP UN30: All versions

PB610 Panel Builder 600: 1.91 - 2.8.0.367

CPE2.3

• cpe:2.3:a:abb:bsp_un31:*:*:*:*:*:*:*:*
• 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://www.us-cert.gov/ics/advisories/icsa-19-178-01
https://search-ext.abb.com/library/Download.aspx?DocumentID=3ADR010377&LanguageCode=en&DocumentPartId=&Action=Launch

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.