CVE-2021-20045 Memory corruption in SonicWall SMA100

Critical 9.8 Published 8 Dec 2021 Updated 3 Aug 2024

Remote unauthenticated attackers can execute code as the nobody user via a buffer overflow in the SMA100 appliance.

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-2021-20045?

CVE-2021-20045 is a critical memory corruption vulnerability in SonicWall SMA100, published on 8 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A buffer overflow vulnerability in SMA100 sonicfiles RAC_COPY_TO (RacNumber 36) method allows a remote unauthenticated attacker to potentially execute code as the 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

Weakness: CWE-120

Which versions are affected by CVE-2021-20045?

It affects 5 products.

Products include Sonicwall Sma 200 Firmware, Sonicwall Sma 210 Firmware, Sonicwall Sma 400 Firmware, Sonicwall Sma 410 Firmware, Sonicwall Sma 500v Firmware.

How do I fix CVE-2021-20045?

No fix has been published for CVE-2021-20045 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-2021-20045 being exploited?

There is no known exploitation of CVE-2021-20045 in the wild and no public exploit code.

Sources

Also known as GHSA-8pg9-567c-mmc6.