CVE-2021-3672
5.6 · MEDIUMOverview
CVE-2021-3672 is a medium-severity vulnerability affecting c-ares_project c-ares. It was published on November 23, 2021 and has a CVSS 3.1 base score of 5.6 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.6, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from c-ares_project. Update c-ares to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| c-ares_project | c-ares | >= 1.0.0, < 1.17.2 | Affected |
| siemens | sinec_infrastructure_network_services | >= 0, < 1.0.1.1 | Affected |
| nodejs | node.js | 12.0.0 | Affected |
| pgbouncer | pgbouncer | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-3672?
CVE-2021-3672 is a medium-severity vulnerability affecting c-ares_project c-ares. It was published on November 23, 2021 and has a CVSS 3.1 base score of 5.6 (MEDIUM).
How severe is CVE-2021-3672?
This vulnerability has a CVSS 3.1 base score of 5.6, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-3672?
Check the references section for vendor advisories and patches from c-ares_project. Update c-ares to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-3672?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-3672 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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