#VU80328 Small Space of Random Values in MXsecurity - CVE-2023-39979

Vulnerability identifier: #VU80328

Vulnerability risk: High

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:Amber]

CVE-ID: CVE-2023-39979

CWE-ID: CWE-334

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MXsecurity
Server applications / Other server solutions

Vendor: Moxa

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to small space of random values. A remote attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MXsecurity: 1.0 - 1.0.1

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External links
https://www.moxa.com/en/support/product-support/security-advisory/mpsa-230403-mxsecurity-series-multiple-vulnerabilities

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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