Denial-of-Service and Potential Remote Code Execution in Ethernut by Nut/OS
CVE-2020-25108

9.8CRITICAL

Key Information:

Vendor

Ethernut

Status
Nut\/os
Vendor
CVE Published:
11 December 2020

What is CVE-2020-25108?

A critical vulnerability was identified in the DNS implementation within Ethernut's Nut/OS 5.1. The flaw arises from the lack of validation on the DNS response data length, allowing it to be set to an arbitrary value. This oversight could lead to potential Denial-of-Service conditions, and may even open avenues for Remote Code Execution. Organizations utilizing this system should assess their risk and take appropriate measures to mitigate these issues.

References

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

EPSS Score

53% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.