CVE-2023-26249

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Source
https://cve.org/CVERecord?id=CVE-2023-26249
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-26249.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-26249
Downstream
Published
2023-02-21T02:15:10.293Z
Modified
2026-04-12T06:36:54.201614Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/cz-nic/knot-resolver

Affected ranges

Type
GIT
Repo
https://github.com/cz-nic/knot-resolver
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
2425110cb28ce3c3f6a21f5935188a272b4479ed
Database specific 
{
    "cpe": "cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*",
    "source": "CPE_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "5.6.0"
        }
    ]
}

Affected versions

v1.*
v1.0.0
v1.0.0-beta1
v1.0.0-beta2
v1.0.0-beta3
v1.1.0
v1.1.1
v1.2.0
v1.2.0-rc1
v1.2.0-rc2
v1.2.0-rc3
v1.2.1
v1.2.6
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.4.0
v1.5.0
v1.5.1
v2.*
v2.0.0
v2.1.0
v2.1.1
v2.2.0
v2.3.0
v2.4.0
v3.*
v3.0.0
v3.1.0
v3.2.0
v3.2.1
v4.*
v4.0.0
v4.1.0
v4.2.0
v4.2.2
v4.3.0
v5.*
v5.0.0
v5.0.1
v5.1.0
v5.1.1
v5.1.2
v5.1.3
v5.2.0
v5.2.1
v5.3.0
v5.3.1
v5.3.2
v5.4.0
v5.4.1
v5.4.2
v5.4.3
v5.5.0
v5.5.1
v5.5.2
v5.5.3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-26249.json"