CVE-2023-40942 Memory corruption in n/a

Critical 9.8 Published 7 Sep 2023 Updated 26 Sep 2024

A stack overflow in the Tenda AC9 router allows attackers to execute arbitrary code or cause a denial of service via a crafted firewall configuration request.

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-2023-40942?

CVE-2023-40942 is a critical memory corruption vulnerability in n/a, published on 7 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Tenda AC9 V3.0BR_V15.03.06.42_multi_TD01 was discovered stack overflow via parameter 'firewall_value' at url /goform/SetFirewallCfg.

Weakness: CWE-787

Which versions are affected by CVE-2023-40942?

It affects 1 product.

Products include Tendacn Ac9 Firmware.

How do I fix CVE-2023-40942?

No fix has been published for CVE-2023-40942 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-2023-40942 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-40942 exists.

Sources

Also known as GHSA-jw52-33wp-prp2.