Security restrictions bypass in Knot Resolver - CVE-2018-10920
Published: August 27, 2018 / Updated: August 30, 2018
Vulnerability identifier: #VU14571
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-10920
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The vulnerability exists due to an error in DNS resolver component when processing malicious input. A remote attacker can supply specially crafted data, bypass security restrictions and poison cache.
Affected software
Knot Resolver
Fedora
knot-resolver
Fedora
knot-resolver
How to mitigate CVE-2018-10920
Update to version 2.4.1.
Knot Resolver - update to 2.4.1
knot-resolver - addressed in versions 2.4.1-1.el7, 2.4.1-1.fc27, 2.4.1-1.fc28
knot-resolver - addressed in versions 2.4.1-1.el7, 2.4.1-1.fc27, 2.4.1-1.fc28