#VU26402 Stack-based buffer overflow in Archer A7


Published: 2020-03-26

Vulnerability identifier: #VU26402

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10881

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

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

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 when handling the DNS responses. A remote unauthenticated attacker can send a specially crafted DNS message, 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 A7: 190726


External links
http://www.zerodayinitiative.com/advisories/ZDI-20-333/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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


Latest bulletins with this vulnerability