PT-2020-15949 · Ethernut · Nut/Os

Published 2020-12-11 · Updated 2020-12-15 · CVE-2020-25107

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Nut/OS version 5.1

Description An issue was discovered in the DNS implementation in Ethernut. There is no check on whether a domain name has '0' termination. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.

Recommendations For Nut/OS version 5.1, consider implementing a check for '0' termination in domain names to prevent potential Denial-of-Service and Remote Code Execution attacks. As a temporary workaround, restrict the use of the DNS implementation in Ethernut until a patch is available.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2020-25107

Affected Products

Nut/Os

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2020-25107 · Security Note
• https://osv.dev/vulnerability/CVE-2020-25107 · Vendor Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 · Note
• https://t.me/cibsecurity/20664 · Telegram Post
• https://kb.cert.org/vuls/id/815128 · Note
• https://t.me/cibsecurity/20723 · Telegram Post
• https://t.me/cibsecurity/20704 · Telegram Post
• https://t.me/cvenotify/7081 · Telegram Post
• https://t.me/cibsecurity/20684 · Telegram Post