CVE-2020-25109 Denial of service in n/a
Attackers can cause denial of service or potentially execute code by sending malformed DNS packets to Ethernut Nut/OS devices.
- 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-2020-25109?
CVE-2020-25109 is a critical denial of service 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 number of DNS queries/responses (set in a DNS header) is not checked against the data present. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.
Weakness: CWE-125
Which versions are affected by CVE-2020-25109?
It affects 1 product.
Products include Ethernut Nut\/Os.
How do I fix CVE-2020-25109?
No fix has been published for CVE-2020-25109 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-25109 being exploited?
There is no known exploitation of CVE-2020-25109 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-w9cm-mhh5-jvr7.