Improper Authentication in ASUS GT-AC2900 and Lyra Mini

1) Improper Authentication

EUVDB-ID: #VU104127

Risk: High

CVSSv4.0: 9.3 [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:A/U:Amber]

CVE-ID: CVE-2021-32030

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 when processing authentication requests. A remote attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

GT-AC2900: before 3.0.0.4.386.42643

Lyra Mini: before 3.0.0.4.384.46630

CPE2.3

• cpe:2.3:h:asus:gt-ac2900:*:*:*:*:*:*:*:*
• cpe:2.3:h:asus:lyra_mini:*:*:*:*:*:*:*:*

External links

https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0010.md
https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0010.md
https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AC2900/HelpDesk_BIOS/
https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AC2900/HelpDesk_BIOS/
https://www.asus.com/us/supportonly/lyra%20mini/helpdesk_bios/
https://www.atredis.com/blog/2021/4/30/asus-authentication-bypass
https://jvn.jp/en/vu/JVNVU97639704/index.html

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?

Yes. This vulnerability is being exploited in the wild.