Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache
Published Aug 2, 2018
6.8
MEDIUMCVSS 3.1
EPSS 3.24%
Description
Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache.
Affected products
-
- Version before 2.4.1StatusaffectedConstraints-
- 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 |
|
- < 2.4.1
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:H/PR:N/UI:N/S:C/C:N/I:H/A:N
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
AV:N/AC:M/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 2, 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 (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 3.24% (0.03239) | 87.86th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.24% (0.03239) | 86.63th | v5 (v2026.06.15) |
| Nov 21, 2025 | 12.20% (0.12203) | 93.55th | v4 (v2025.03.14) |
| Nov 18, 2025 | 7.94% (0.07940) | 91.17th | v4 (v2025.03.14) |
| Sep 29, 2025 | 12.20% (0.12203) | 93.62th | v4 (v2025.03.14) |
| Mar 30, 2025 | 7.94% (0.07940) | 91.25th | v4 (v2025.03.14) |
| Mar 29, 2025 | 55.65% (0.55646) | 97.21th | v4 (v2025.03.14) |
| Mar 28, 2025 | 7.94% (0.07940) | 91.26th | v4 (v2025.03.14) |
| Mar 27, 2025 | 55.65% (0.55646) | 97.76th | v4 (v2025.03.14) |
| Mar 20, 2025 | 43.87% (0.43874) | 97.28th | v4 (v2025.03.14) |
| Mar 19, 2025 | 55.65% (0.55646) | 97.80th | v4 (v2025.03.14) |
| Mar 17, 2025 | 43.87% (0.43874) | 97.23th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.16% (0.00163) | 54.25th | v3 (v2023.03.01) |
| Jun 11, 2024 | 0.16% (0.00163) | 52.96th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00161) | 50.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.50% (0.04499) | 88.81th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.43% (0.03427) | 68.31th | v5 (v2026.06.15) |
| Apr 14, 2021 | 3.43% (0.03427) | 0.00th | v1 |
References (2)
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10920 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://www.knot-resolver.cz/2018-08-02-knot-resolver-2.4.1.html x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10920 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://www.knot-resolver.cz/2018-08-02-knot-resolver-2.4.1.html | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.