CVE catalog
CVE-2019-19331
knot-resolver: CVE-2019-19331
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 2.11% · Oct 25, 2026
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).
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | knot-resolver | sid | 6.5.0-2 | fixed |
| Debian | knot-resolver | forky | 6.4.2-1 | fixed |
| Debian | knot-resolver | trixie | 5.7.5-1 | fixed |
| Debian | knot-resolver | bookworm | 5.6.0-1+deb12u1 | fixed |
| Debian | knot-resolver | bookworm-security | 5.6.0-1+deb12u1 | fixed |
| Ubuntu | knot-resolver | pro | 1.3.3-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 1.5.0-4 | vulnerable |
| Ubuntu | knot-resolver | pro | 1.5.1-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 1.5.2-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 2.0.0-3 | vulnerable |
| Ubuntu | knot-resolver | pro | 2.1.0-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 2.1.0-2 | vulnerable |
| Ubuntu | knot-resolver | pro | 2.1.1-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 2.1.1-1ubuntu0.1~esm2 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu1 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu2 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu2.1 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu2.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | knot-resolver | source | sid | 5.0.1-1 | not yet assigned | Not reported | [946181] |
| Debian | knot-resolver | source | forky | 5.0.1-1 | not yet assigned | Not reported | [946181] |
| Debian | knot-resolver | source | trixie | 5.0.1-1 | not yet assigned | Not reported | [946181] |
| Debian | knot-resolver | source | bookworm | 5.0.1-1 | not yet assigned | Not reported | [946181] |
| Ubuntu | knot-resolver | deb | 20.04 | 3.2.1-3ubuntu2.2 | Not reported | UBUNTU-CVE-2019-19331 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [knot-resolver]Fixed
Details (4)
5.6.0-1+deb12u1· amd64 · bookwormFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
5.6.0-1+deb12u1· arm64 · bookwormFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
5.6.0-1+deb12u1· amd64 · bookworm-securityFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
5.6.0-1+deb12u1· arm64 · bookworm-securityFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
- [knot-resolver-doc]Fixed
Source package: [knot-resolver]
Details (4)
5.6.0-1+deb12u1· all · bookwormFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
5.6.0-1+deb12u1· all · bookwormFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
5.6.0-1+deb12u1· all · bookworm-securityFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
5.6.0-1+deb12u1· all · bookworm-securityFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
- [knot-resolver-module-http]Fixed
Source package: [knot-resolver]
Details (4)
5.6.0-1+deb12u1· amd64 · bookwormFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
5.6.0-1+deb12u1· arm64 · bookwormFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
5.6.0-1+deb12u1· amd64 · bookworm-securityFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
5.6.0-1+deb12u1· arm64 · bookworm-securityFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · bookworm; dsa · knot-resolver · debian · 12
[Debian 13 (Trixie)]
- [knot-resolver]Fixed
Details (2)
5.7.5-1· amd64 · trixieFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · 13
5.7.5-1· arm64 · trixieFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · 13
- [knot-resolver-doc]Fixed
Source package: [knot-resolver]
Details (2)
5.7.5-1· all · trixieFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · 13
5.7.5-1· all · trixieFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · 13
- [knot-resolver-module-http]Fixed
Source package: [knot-resolver]
Details (2)
5.7.5-1· amd64 · trixieFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · 13
5.7.5-1· arm64 · trixieFixed · Fixed:
5.0.1-1dsa · knot-resolver · debian · 13
Observed: