CVE-2020-25110 Memory corruption in n/a

Critical 9.8 Published 11 Dec 2020 Updated 4 Aug 2024

Attackers can cause denial of service or execute code via unchecked domain name lengths in Nut/OS DNS implementation.

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-2020-25110?

CVE-2020-25110 is a critical memory corruption vulnerability in n/a, published on 11 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a domain name in a DNS query/response is not checked, and is used for internal memory operations. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.

Weakness: CWE-125

Which versions are affected by CVE-2020-25110?

It affects 1 product.

Products include Ethernut Nut\/Os.

How do I fix CVE-2020-25110?

No fix has been published for CVE-2020-25110 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-2020-25110 being exploited?

There is no known exploitation of CVE-2020-25110 in the wild and no public exploit code.

Sources

Also known as GHSA-45rr-9gf8-j69p.