CVE-2021-45988 Memory corruption in n/a

High 7.5 Published 4 Feb 2022 Updated 4 Aug 2024

Attackers can cause a Denial of Service on Tenda G1 and G3 routers via a stack overflow in the DNS forwarding function.

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-2021-45988?

CVE-2021-45988 is a high-severity memory corruption vulnerability in n/a, published on 4 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow in the function formAddDnsForward. This vulnerability allows attackers to cause a Denial of Service (DoS) via the DnsForwardRule parameter.

Weakness: CWE-787

Which versions are affected by CVE-2021-45988?

It affects 2 products.

Products include Tendacn G1 Firmware, Tendacn G3 Firmware.

How do I fix CVE-2021-45988?

No fix has been published for CVE-2021-45988 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-2021-45988 being exploited?

There is no known exploitation of CVE-2021-45988 in the wild and no public exploit code.

Sources

Also known as GHSA-gpjp-7j74-g24x.