CVE-2021-44246 Memory corruption in n/a

High 7.5 Published 4 Feb 2022 Updated 4 Aug 2024

Attackers can cause a Denial of Service on Totolink routers via a stack overflow in the setNoticeCfg function using the IpTo 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-2021-44246?

CVE-2021-44246 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

Totolink devices A3100R v4.1.2cu.5050_B20200504, A830R v5.9c.4729_B20191112, and A720R v4.1.5cu.470_B20200911 were discovered to contain a stack overflow in the function setNoticeCfg. This vulnerability allows attackers to cause a Denial of Service (DoS) via the IpTo parameter.

Which versions are affected by CVE-2021-44246?

It affects 3 products.

Products include Totolink A3100r Firmware, Totolink A720r Firmware, Totolink A830r Firmware.

How do I fix CVE-2021-44246?

No fix has been published for CVE-2021-44246 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-2021-44246 being exploited?

There is no known exploitation of CVE-2021-44246 in the wild and no public exploit code.

Sources

Also known as GHSA-4555-c4vh-gv67.