#VU26403 Command Injection in Archer A7 - CVE-2020-10882

Vulnerability identifier: #VU26403

Vulnerability risk: Low

CVSSv4.0: 8.7 [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:A/U:Clear]

CVE-ID: CVE-2020-10882

CWE-ID: CWE-77

Exploitation vector: Local network

Exploit availability: Yes

Vulnerable software:
Archer A7
Hardware solutions / Routers for home users

Vendor: TP-Link

Description

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

The vulnerability exists within the "tdpServer" service due to the process does not properly validate a user-supplied string before using it to execute a system call when parsing the "slave_mac" parameter. A remote attacker on the local network can execute arbitrary commands on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Archer A7: 190726

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External links
https://www.zerodayinitiative.com/advisories/ZDI-20-334/

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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. However, a fully functional exploit for this vulnerability is available.