Knot Resolver

knot_resolver

Vendor: Nic • 14 CVEs

CVEs (14)

CVE VENDORS PRODUCTS UPDATED PUBLISHED CVSS
CVE-2023-50387 8Fedoraproject IscMicrosoft+5 more 13Bind DnsmasqEnterprise Linux+10 more Jun 17, 2026 Feb 14, 2024 N/A· v4 7.5 HIGH· v3 N/A· v2 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...Show more 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 records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.Show less
CVE-2023-46317 1Nic 1Knot Resolver Jun 17, 2026 Oct 22, 2023 N/A· v4 7.5 HIGH· v3 N/A· v2 Knot Resolver before 5.7.0 performs many TCP reconnections upon receiving certain nonsensical responses from servers.
CVE-2023-26249 1Nic 1Knot Resolver Jun 17, 2026 Feb 21, 2023 N/A· v4 7.5 HIGH· v3 N/A· v2 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...Show more 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 response.Show less
CVE-2022-40188 3Debian FedoraprojectNic 3Debian Linux FedoraKnot Resolver Jun 17, 2026 Sep 23, 2022 N/A· v4 7.5 HIGH· v3 N/A· v2 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 sets.
CVE-2022-32983 1Nic 1Knot Resolver Jun 17, 2026 Jun 20, 2022 N/A· v4 5.3 MEDIUM· v3 5.0 MEDIUM· v2 Knot Resolver through 5.5.1 may allow DNS cache poisoning when there is an attempt to limit forwarding actions by filters.
CVE-2021-40083 1Nic 1Knot Resolver Jun 17, 2026 Aug 25, 2021 N/A· v4 7.5 HIGH· v3 5.0 MEDIUM· v2 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 proof).
CVE-2018-1110 1Nic 1Knot Resolver Nov 21, 2024 Mar 30, 2021 N/A· v4 7.5 HIGH· v3 5.0 MEDIUM· v2 A flaw was found in knot-resolver before version 2.3.0. Malformed DNS messages may cause denial of service.
CVE-2020-12667 1Nic 1Knot Resolver Jun 17, 2026 May 19, 2020 N/A· v4 7.5 HIGH· v3 5.0 MEDIUM· v2 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 records.
CVE-2019-19331 2Debian Nic 2Debian Linux Knot Resolver Jun 17, 2026 Dec 16, 2019 N/A· v4 7.5 HIGH· v3 5.0 MEDIUM· v2 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...Show more 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 records can be squashed into one DNS message (limit is 64kB).Show less
CVE-2013-5661 4Isc NicNlnetlabs+1 more 4Bind Enterprise LinuxKnot Resolver+1 more Nov 21, 2024 Nov 5, 2019 N/A· v4 5.9 MEDIUM· v3 2.6 LOW· v2 Cache Poisoning issue exists in DNS Response Rate Limiting.
CVE-2019-10191 2Fedoraproject Nic 2Fedora Knot Resolver Jun 17, 2026 Jul 16, 2019 N/A· v4 7.5 HIGH· v3 5.0 MEDIUM· v2 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 a...Show more 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 protocol.Show less
CVE-2019-10190 2Fedoraproject Nic 2Fedora Knot Resolver Jun 17, 2026 Jul 16, 2019 N/A· v4 7.5 HIGH· v3 5.0 MEDIUM· v2 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 p...Show more 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 sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.Show less
CVE-2018-10920 1Nic 1Knot Resolver Nov 21, 2024 Aug 2, 2018 N/A· v4 6.8 MEDIUM· v3 4.3 MEDIUM· v2 Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache.
CVE-2018-1000002 1Nic 1Knot Resolver Nov 21, 2024 Jan 22, 2018 N/A· v4 3.7 LOW· v3 4.3 MEDIUM· v2 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 replay.