Authentication bypass in ABB eSOMS

1) Improper authentication

EUVDB-ID: #VU14550

Risk: Low

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-14805

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication on the target system.

The vulnerability exists due to improper authentication. A remote unauthenticated attacker can achieve unauthorized access to the system when LDAP is set to allow anonymous authentication, and specific key values within the eSOMS web.config file are present.

Mitigation

ABB plans to release a new version of eSOMS on September 28, 2018 to address this issue.

NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:

• Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
• Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
• When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices

Vulnerable software versions

eSOMS: 6.0.2

CPE2.3

• cpe:2.3:a:abb:esoms:6.0.2:*:*:*:*:*:*:*

External links

https://ics-cert.us-cert.gov/advisories/ICSA-18-240-04

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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