DEBIAN-CVE-2023-26249

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2023-26249
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-26249.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2023-26249
Upstream
Published
2023-02-21T02:15:10Z
Modified
2025-09-30T05:17:41.462118Z
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
5.7.5-1

6.*

6.0.9-1
6.0.10-1
6.0.12-1
6.0.13-1
6.0.14-1
6.0.15-1

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"
}

Debian:14 / 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"
}