CVE-2023-26249

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Source
https://nvd.nist.gov/vuln/detail/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
Related
Published
2023-02-21T02:15:10Z
Modified
2025-03-14T20:50:49.619123Z
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

Debian:11 / knot-resolver

Package

Name
knot-resolver
Purl
pkg:deb/debian/knot-resolver?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.1-1
5.3.1-1+deb11u1
5.4.1-1
5.4.1-2
5.4.2-1
5.4.3-1
5.4.4-1
5.5.0-1
5.5.1-1
5.5.1-2
5.5.1-3
5.5.1-4
5.5.1-5
5.5.2-1
5.5.3-1
5.6.0-1
5.6.0-1.1
5.7.0-1
5.7.1-1
5.7.2-1
5.7.3-1
5.7.3-2
5.7.4-1
5.7.4-2

6.*

6.0.9-1
6.0.10-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / knot-resolver

Package

Name
knot-resolver
Purl
pkg:deb/debian/knot-resolver?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.6.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / knot-resolver

Package

Name
knot-resolver
Purl
pkg:deb/debian/knot-resolver?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.6.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

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

Affected versions

1.*

1.3.0-rc1

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
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.2.6
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.4.0
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.99.1-alpha

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
v4.2.1
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
v5.4.4
v5.5.0
v5.5.1
v5.5.2
v5.5.3