XSS in C-Ares Project
CVE-2021-3672
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.026 (84.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- C-ares_project C-ares
- Nodejs Node.js
- Pgbouncer
- Siemens Sinec_infrastructure_network_services
- Fedoraproject Fedora — versions 33, 34
- Redhat Enterprise_linux — versions 7.0, 7.7, 8.0
- Redhat Enterprise_linux_computer_node — versions 1
- Redhat Enterprise_linux_eus — versions 7.7, 8.1, 8.2
- Redhat Enterprise_linux_for_ibm_z_systems — versions 8.0
- Redhat Enterprise_linux_for_ibm_z_systems_eus — versions 8.1, 8.2, 8.4
Weakness classification (CWE)
References
- secalert@redhat.com (Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Exploit, Patch, Vendor Advisory)
- secalert@redhat.com (Patch, Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (vendor-advisory)
Frequently asked questions
- What is CVE-2021-3672?
- CVE-2021-3672 is a medium-severity vulnerability in C-Ares Project, classified under Cross-site Scripting. CVSS score: 5.6/10. Published 2021-11-23.
- How severe is CVE-2021-3672?
- Medium severity. CVSS v3 base score is 5.6 out of 10.