CVE-2021-43042 Memory corruption in n/a

Critical 9.8 Published 6 Dec 2021 Updated 4 Aug 2024

Remote unauthenticated attackers can exploit a buffer overflow in the vaultServer component to execute arbitrary code on Kaseya Unitrends Backup Appliances.

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-2021-43042?

CVE-2021-43042 is a critical memory corruption vulnerability in n/a, published on 6 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A buffer overflow existed in the vaultServer component. This was exploitable by a remote unauthenticated attacker.

Weakness: CWE-120

Which versions are affected by CVE-2021-43042?

It affects 1 product.

Products include Kaseya Unitrends Backup.

How do I fix CVE-2021-43042?

No fix has been published for CVE-2021-43042 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-2021-43042 being exploited?

There is no known exploitation of CVE-2021-43042 in the wild and no public exploit code.

Sources

Also known as GHSA-8xcf-7jjj-p7rh.