OS Command Injection in FXC routers

1) OS Command Injection

EUVDB-ID: #VU83901

Risk: High

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2023-49897

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation. A remote user on the local network can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability is being actively exploited in the wild by the Mirai-based botnet named InfectedSlurs.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

AE1021PE: 2.0.9

AE1021: 2.0.9

External links

http://jvn.jp/en/vu/JVNVU92152057/index.html
http://www.fxc.jp/news/20231206
http://www.akamai.com/blog/security-research/zero-day-vulnerability-spreading-mirai-patched

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.