CVE-2021-27706 Memory corruption in n/a

Critical 9.8 Published 14 Apr 2021 Updated 3 Aug 2024

Remote attackers can execute arbitrary code on Tenda G1 and G3 routers via a buffer overflow in the IPMacBindIndex parameter.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-27706?

CVE-2021-27706 is a critical memory corruption vulnerability in n/a, published on 14 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Buffer Overflow in Tenda G1 and G3 routers with firmware version V15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"IPMacBindIndex "request. This occurs because the "formIPMacBindDel" function directly passes the parameter "IPMacBindIndex" to strcpy without limit.

Weakness: CWE-120

Which versions are affected by CVE-2021-27706?

It affects 2 products.

Products include Tenda G1 Firmware, Tenda G3 Firmware.

How do I fix CVE-2021-27706?

No fix has been published for CVE-2021-27706 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-27706 being exploited?

There is no known exploitation of CVE-2021-27706 in the wild and no public exploit code.

Sources

Also known as GHSA-2p22-jp73-7gf2.