#VU73760 Stack-based buffer overflow in Archer AX21 - CVE-2023-27332

Vulnerability identifier: #VU73760

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-27332

CWE-ID: CWE-121

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Archer AX21
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: TP-Link

Description

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

The vulnerability exists due to a boundary error within the logging functionality of the tdpServer program. A remote unauthenticated on the local network attacker 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

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External links
https://www.zerodayinitiative.com/advisories/ZDI-23-245/
https://www.tp-link.com/us/support/download/archer-ax21/#Firmware

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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.