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Knot Resolver < 5.1.1 NXNSAttack Vulnerability
Information
Severity
Severity
High
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
7.8
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:C
Solution Type
Solution Type
Vendor Patch
Created
Created
3 years ago
Modified
Modified
3 years ago
Summary
Knot Resolver is prone to a denial of service vulnerability (NXNSAttack).
Insight
Insight
Knot Resolver allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an 'NXNSAttack' issue. This is triggered by random subdomains in the NSDNAME in NS records.
Affected Software
Affected Software
Knot Resolver prior to version 5.1.1.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 5.1.1 or later.