Which products and versions are affected by CVE-2020-25109?

Affected: Nut\/os (Ethernut). The full list is in the CVE brief.

Is CVE-2020-25109 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2020-25109 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2020-25109?

No public exploit code is known.

Is there a fix for CVE-2020-25109?

Fixed versions are available, including Nut\/os <=5.1, Nut\/os 5.1.

How urgently should CVE-2020-25109 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2020-25109

Q: What is CVE-2020-25109?

An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1.

Q: How urgently should CVE-2020-25109 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Critical

The number of DNS queries/responses (set in a DNS header) is not checked against the data present.

Published Dec 11, 2020 · Updated Nov 21, 2024

Key Facts

Patch immediately

CVE-2020-25109 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Nut\/os (Ethernut).
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 54% probability of exploitation in the next 30 days.
Fixed versions are available, including Nut\/os <=5.1, Nut\/os 5.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

54%

Higher than 98.9% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2020-25109 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
Nut\/osEthernut	See advisory	5.1

Patched Releases

Nut\/os

<=5.1

Timeline

Publicly disclosed
Dec 11, 2020
Last updated
Nov 21, 2024

Weakness Type

CWE-125 Out-of-bounds Read

References

advisoryhttps://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
advisoryhttps://www.kb.cert.org/vuls/id/815128

FAQ

Common Questions.

An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1.
Affected: Nut\/os (Ethernut). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Nut\/os <=5.1, Nut\/os 5.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2020-25109 Running On Your Attack Surface?

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