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
Published Jul 16, 2019
7.5
HIGHCVSS 3.1
EPSS 1.99%
Description
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.
Affected products
-
- Version from 3.2.0 before 4.1.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Cz.nic | Knot-Resolver | n/a |
|
Configuration 1
- ≤ 3.2.0
- ≥ 4.0.0 · < 4.1.0
Configuration 2
- 29
- 30
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
AV:N/AC:L/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.99% (0.01993) | 79.93th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.99% (0.01993) | 78.01th | v5 (v2026.06.15) |
| May 22, 2025 | 0.43% (0.00426) | 61.29th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.52% (0.01518) | 79.95th | v4 (v2025.03.14) |
| Dec 17, 2024 | 0.28% (0.00278) | 67.83th | v3 (v2023.03.01) |
| Jul 9, 2024 | 0.33% (0.00333) | 71.37th | v3 (v2023.03.01) |
| Apr 26, 2024 | 0.24% (0.00243) | 63.97th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.28% (0.00278) | 67.40th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.28% (0.00278) | 64.30th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.27% (0.00265) | 62.36th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.18% (0.07176) | 80.33th | v2 (v2022.01.01) |
| Feb 3, 2022 | 5.60% (0.05603) | 80.32th | v1 |
| Jan 6, 2022 | 5.60% (0.05603) | 80.12th | v1 |
| Jan 5, 2022 | 1.31% (0.01306) | 70.67th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.31% (0.01306) | 0.00th | v1 |
References (5)
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/ vendor-advisoryx_refsource_FEDORA
- https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html x_refsource_CONFIRMRelease NotesVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html | ||
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/ | vendor-advisoryx_refsource_FEDORA | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/ | vendor-advisoryx_refsource_FEDORA | |
| https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html | x_refsource_CONFIRMRelease NotesVendor Advisory |
Change history (0)
No recorded changes yet.