Authentication bypass in Emerson Rosemount X-STREAM Gas Analyzer

1) Improper Authentication

EUVDB-ID: #VU49108

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-27254

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote attacker can bypass authentication process and access log and backup data.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

The following versions of Emerson’s Rosemount X-STREAM gas analysis software, are affected:

• X-STREAM enhanced XEGP – all revisions 
• X-STREAM enhanced XEGK – all revisions 
• X-STREAM enhanced XEFD – all revisions 
• X-STREAM enhanced XEXF – all revisions

Vulnerable software versions

Rosemount X-STREAM Gas Analyzer: All versions

External links

http://ics-cert.us-cert.gov/advisories/icsa-20-352-01

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 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.