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8 vulnerabilities found for knot-resolver by CZ.NIC

CVE-2019-19331 (GCVE-0-2019-19331)

Vulnerability from cvelistv5 – Published: 2019-12-16 00:00 – Updated: 2024-08-05 02:16
VLAI?
Summary
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).
Severity ?
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
CZ.NIC knot-resolver Affected: 4.3.0
Create a notification for this product.
Show details on NVD website
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CVE-2019-10191 (GCVE-0-2019-10191)

Vulnerability from cvelistv5 – Published: 2019-07-16 17:52 – Updated: 2025-02-13 16:27
VLAI?
Summary
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.
Severity ?
6.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE
Assigner
References
Impacted products
Vendor Product Version
CZ.NIC knot-resolver Affected: all before 4.1.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2019-10190 (GCVE-0-2019-10190)

Vulnerability from cvelistv5 – Published: 2019-07-16 17:50 – Updated: 2025-02-13 16:27
VLAI?
Summary
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.
Severity ?
5.4 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
CZ.NIC knot-resolver Affected: from 3.2.0 before 4.1.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2018-10920 (GCVE-0-2018-10920)

Vulnerability from cvelistv5 – Published: 2018-08-02 13:00 – Updated: 2024-08-05 07:54
VLAI?
Summary
Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache.
Severity ?
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
cz.nic knot-resolver Affected: before 2.4.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2019-19331 (GCVE-0-2019-19331)

Vulnerability from nvd – Published: 2019-12-16 00:00 – Updated: 2024-08-05 02:16
VLAI?
Summary
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).
Severity ?
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
CZ.NIC knot-resolver Affected: 4.3.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2019-10191 (GCVE-0-2019-10191)

Vulnerability from nvd – Published: 2019-07-16 17:52 – Updated: 2025-02-13 16:27
VLAI?
Summary
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.
Severity ?
6.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE
Assigner
References
Impacted products
Vendor Product Version
CZ.NIC knot-resolver Affected: all before 4.1.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2019-10190 (GCVE-0-2019-10190)

Vulnerability from nvd – Published: 2019-07-16 17:50 – Updated: 2025-02-13 16:27
VLAI?
Summary
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.
Severity ?
5.4 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
CZ.NIC knot-resolver Affected: from 3.2.0 before 4.1.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2018-10920 (GCVE-0-2018-10920)

Vulnerability from nvd – Published: 2018-08-02 13:00 – Updated: 2024-08-05 07:54
VLAI?
Summary
Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache.
Severity ?
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
cz.nic knot-resolver Affected: before 2.4.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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