Input validation error in c-ares - CVE-2021-3672
Published: September 30, 2021
Vulnerability identifier: #VU56967
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-3672
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: c-ares.haxx.se
Affected software:
c-ares
c-ares
Detailed vulnerability description
The vulnerability allows a remote attacker to hijack domains.
The vulnerability exists due to insufficient validation of host names, returned by the DNS server. A remote attacker can pass specially crafted input to the application and perform domain hijacking.
How to mitigate CVE-2021-3672
Install updates from vendor's website.