CVE-2021-3672 is a medium-severity flaw in the c-ares library, affecting products like Node.js, Red Hat, and Siemens. It stems from a missing input validation check for hostnames returned by DNS, potentially leading to incorrect hostname output and domain hijacking. The vulnerability has a CVSS score of 5.6, indicating a network-based attack with high attack complexity, and could impact confidentiality, integrity, and availability. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.0.0, < 1.17.2CPE matchmatch criteria | cpe:2.3:a:c-ares_project:c-ares:*:*:*:*:*:*:*:* | ||
33CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | ||
7.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | ||
7.7CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:7.7:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
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.
Nov 9, 2021c-ares: Missing input validation of host names may lead to domain hijacking
Aug 10, 2021