Multiple vulnerabilities in TP-Link Archer AX21

Published: 2023-03-16

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-27333 CVE-2023-27332
CWE-ID	CWE-121
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	Archer AX21 Hardware solutions / Routers & switches, VoIP, GSM, etc
Vendor

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Stack-based buffer overflow

EUVDB-ID: #VU73759

Risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-27333

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the handling of command 0x422 provided to the tmpServer service. A remote administrator on the local network can trigger stack-based buffer overflow and execute arbitrary code on the target system.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Archer AX21: before 3.6_230219

External links

http://www.zerodayinitiative.com/advisories/ZDI-23-244/
http://www.tp-link.com/us/support/download/archer-ax21/#Firmware

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

2) Stack-based buffer overflow

EUVDB-ID: #VU73760

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-27332