DEBIAN-CVE-2021-3672

Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2021-3672
Published: 23 Nov 2021, 19:15
Last modified:28 Apr 2026, 20:22

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.6 MEDIUM
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

23 Nov 2021, 19:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:22
Last Modified
Vulnerability information updated

Description

A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.6CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected Systems

  • debian•c-ares

    < 1.17.1-1+deb11u1 | < 1.17.1-1.1 | < 1.17.1-1.1 | < 1.17.1-1.1

References (1)