Input validation error in Knot Resolver - CVE-2019-10191
Published: November 7, 2019
Vulnerability identifier: #VU22593
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-10191
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Knot Resolver
Knot Resolver
Software vendor:
Nic
Nic
Description
The vulnerability allows a remote attacker to hijack domain on the target system.
The vulnerability exists due to insufficient validation of user-supplied input in DNS resolver. A remote attacker can downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
Remediation
Install updates from vendor's website.