#VU57425 Improper Authentication in MF971R - CVE-2021-21745

Vulnerability identifier: #VU57425

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-21745

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MF971R
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: ZTE

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to referer mitigation bypass issue. A remote unauthenticated attacker can trick a victim to visit a specially crafted link, bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MF971R: All versions

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External links
https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1317

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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.