PT-2020-15950 · Nut/Os · Ethernut

Published 2020-12-11 · Updated 2020-12-15 · CVE-2020-25108

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 Ethernut in Nut/OS version 5.1

Description An issue was discovered in the DNS implementation where the DNS response data length is not checked, allowing it to be set to an arbitrary value from a packet. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.

Recommendations For Ethernut in Nut/OS version 5.1, consider implementing checks on the DNS response data length to prevent it from being set to arbitrary values, which could help mitigate the risk of Denial-of-Service and potential Remote Code Execution. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2020-25108

Affected Products

Ethernut

References · 10

• https://osv.dev/vulnerability/CVE-2020-25108 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-25108 · Security Note
• https://t.me/cibsecurity/20660 · Telegram Post
• https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 · Note
• https://t.me/cibsecurity/20719 · Telegram Post
• https://kb.cert.org/vuls/id/815128 · Note
• https://t.me/cibsecurity/20680 · Telegram Post
• https://t.me/cvenotify/7071 · Telegram Post
• https://t.me/cibsecurity/20700 · Telegram Post
• https://t.me/cvenotify/7082 · Telegram Post