Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG....
7.5CVSS
7.7AI Score
0.05EPSS
Knot Resolver before 5.7.0 performs many TCP reconnections upon receiving certain nonsensical responses from...
7.5CVSS
7.4AI Score
0.0005EPSS
Knot Resolver before 5.6.0 enables attackers to consume its resources, launching amplification attacks and potentially causing a denial of service. Specifically, a single client query may lead to a hundred TCP connection attempts if a DNS server closes connections without providing a...
7.5CVSS
7.3AI Score
0.001EPSS
Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU consumption) because of algorithmic complexity. During an attack, an authoritative server must return large NS sets or address...
7.5CVSS
7.2AI Score
0.006EPSS
Knot Resolver through 5.5.1 may allow DNS cache poisoning when there is an attempt to limit forwarding actions by...
5.3CVSS
5.6AI Score
0.001EPSS
Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case (NSEC3 with too many iterations used for a positive wildcard...
7.5CVSS
7.4AI Score
0.002EPSS
A flaw was found in knot-resolver before version 2.3.0. Malformed DNS messages may cause denial of...
7.5CVSS
7.2AI Score
0.001EPSS
Knot Resolver before 5.1.1 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...
7.5CVSS
7.2AI Score
0.008EPSS
knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A...
7.5CVSS
7.1AI Score
0.002EPSS
5.9CVSS
5.7AI Score
0.001EPSS
A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of...
7.5CVSS
7.3AI Score
0.005EPSS
A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS...
7.5CVSS
7.2AI Score
0.005EPSS
Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison...
6.8CVSS
6.5AI Score
0.002EPSS
Improper input validation bugs in DNSSEC validators components in Knot Resolver (prior version 1.5.2) allow attacker in man-in-the-middle position to deny existence of some data in DNS via packet...
3.7CVSS
4.9AI Score
0.001EPSS