#VU74239 Missing Authentication for Critical Function in SkyBridge MB-A100 and SkyBridge MB-A110 - CVE-2023-23906

Vulnerability identifier: #VU74239

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-23906

CWE-ID: CWE-306

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SkyBridge MB-A100
Hardware solutions / Routers & switches, VoIP, GSM, etc
SkyBridge MB-A110
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Seiko Solutions

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to missing authentication for critical function. A remote attacker can execute some critical functions without authentication, e.g., rebooting the product.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SkyBridge MB-A100: 4.2.0

SkyBridge MB-A110: 4.2.0

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External links
https://jvn.jp/en/jp/JVN40604023/index.html
https://www.seiko-sol.co.jp/archives/73969/

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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.