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CVE-2020-25109: 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 succ...
CVE-2020-25109 · published 5 years ago
Summary
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.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| ethernut | nut\/os |
<= 5.1 cpe:2.3:o:ethernut:nut\/os:*:*:*:*:*:*:*:* |
Original advisory text
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 succ...
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.
References
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 Third Party Advisory US Government Resource
- https://www.kb.cert.org/vuls/id/815128 Third Party Advisory US Government Resource
Internet-facing
3 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker full control (estimated)
Type
CWE-125Out-of-bounds Read
Timeline
Published11 Dec 2020
Updated29 Sep 2026
First seen29 Sep 2026
Sources
CVE-2020-25109 · NVD
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