#VU69569 Use of insufficiently random values in TL-WR940N


Published: 2022-11-24

Vulnerability identifier: #VU69569

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-43636

CWE-ID: CWE-330

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
TL-WR940N
Hardware solutions / Routers for home users

Vendor:

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the lack of sufficient randomness in the sequnce numbers used for session managment within the httpd service. A remote attacker on the local network can bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions


External links
http://www.zerodayinitiative.com/advisories/ZDI-22-1614/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability