Command Injection in LB-LINK Wireless Routers

1) Command Injection

EUVDB-ID: #VU77584

Risk: High

CVSSv3.1: 9.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2023-26801

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation in the "mac", "time1" and "time2" parameters at /goform/set_LimitClient_cfg. A remote attacker can pass specially crafted data to the application and execute arbitrary commands on the target system.

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

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

BL-AC1900: 1.0.1

BL-WR9000: 2.4.9

BL-X26: 1.2.5

BL-LTE300: 1.0.8

CPE2.3

• cpe:2.3:h:lb-link:bl-ac1900:1.0.1:*:*:*:*:*:*:
• cpe:2.3:h:lb-link:bl-wr9000:2.4.9:*:*:*:*:*:*:
• cpe:2.3:h:lb-link:bl-x26:1.2.5:*:*:*:*:*:*:
• cpe:2.3:h:lb-link:bl-lte300:1.0.8:*:*:*:*:*:*:

External links

http://github.com/winmt/my-vuls/tree/main/LB-LINK%20BL-AC1900%2C%20BL-WR9000%2C%20BL-X26%20and%20BL-LTE300%20Wireless%20Routers
http://www.broadcom.com/support/security-center/attacksignatures/detail?asid=34211

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker 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?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.