CVE catalog
CVE-2020-12662
unbound: CVE-2020-12662
- Severity
- High · CVSS 8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.20% · Oct 25, 2026
Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.
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 | unbound | sid | 1.26.2-1 | fixed |
| Debian | unbound | forky | 1.26.2-1 | fixed |
| Debian | unbound | trixie | 1.22.0-2+deb13u3 | fixed |
| Debian | unbound | trixie-security | 1.26.2-0+deb13u1 | fixed |
| Debian | unbound | bookworm | 1.17.1-2+deb12u4 | fixed |
| Debian | unbound | bookworm-security | 1.17.1-2+deb12u3 | fixed |
| Ubuntu | unbound | pro | 1.4.22-1ubuntu6 | vulnerable |
| Ubuntu | unbound | pro | 1.5.7-1ubuntu1 | vulnerable |
| Ubuntu | unbound | pro | 1.5.7-1ubuntu2 | vulnerable |
| Ubuntu | unbound | pro | 1.5.8-1ubuntu1 | vulnerable |
| Ubuntu | unbound | pro | 1.5.8-1ubuntu1.1 | vulnerable |
| Ubuntu | unbound | pro | 1.5.8-1ubuntu1.1+esm1 | vulnerable |
| Ubuntu | unbound | pro | 1.5.8-1ubuntu1.1+esm2 | vulnerable |
| Ubuntu | unbound | pro | 1.5.8-1ubuntu1.1+esm3 | vulnerable |
| Ubuntu | unbound | pro | 1.5.8-1ubuntu1.1+esm4 | vulnerable |
| Ubuntu | unbound | pro | 1.5.8-1ubuntu1.1+esm5 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.5-1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1build1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu2 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu2.1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu2.2 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu2.3 | fixed |
| Ubuntu | unbound | 20.04 | 1.9.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.1 | fixed |
| Alpine | unbound | 3.10 | 1.9.1-r8 | fixed |
| Alpine | unbound | 3.11 | 1.9.6-r1 | fixed |
| Alpine | unbound | 3.12 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.13 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.14 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.15 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.16 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.17 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.18 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.19 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.20 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.21 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.22 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.23 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.24 | 1.10.1-r0 | fixed |
| Alpine | unbound | 3.9 | 1.8.3-r4 | fixed |
| Ubuntu | unbound | 18.04 | 1.6.5-1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1build1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu2 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu2.1 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu2.2 | vulnerable |
| Ubuntu | unbound | 18.04 | 1.6.7-1ubuntu2.3 | fixed |
| Ubuntu | unbound | 20.04 | 1.9.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | unbound | source | sid | 1.10.1-1 | not yet assigned | Not reported | Not reported |
| Debian | unbound | source | forky | 1.10.1-1 | not yet assigned | Not reported | Not reported |
| Debian | unbound | source | trixie | 1.10.1-1 | not yet assigned | Not reported | Not reported |
| Debian | unbound | source | bookworm | 1.10.1-1 | not yet assigned | Not reported | Not reported |
| Ubuntu | unbound | deb | 18.04 | 1.6.7-1ubuntu2.3 | Not reported | UBUNTU-CVE-2020-12662 | Not reported |
| Ubuntu | unbound | deb | 20.04 | 1.9.4-2ubuntu1.1 | Not reported | UBUNTU-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.10 | 1.9.1-r8 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.11 | 1.9.6-r1 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.12 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.13 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.14 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.15 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.16 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.17 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.18 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.19 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.20 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.21 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.22 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.23 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.24 | 1.10.1-r0 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Alpine | unbound | apk | 3.9 | 1.8.3-r4 | Not reported | ALPINE-CVE-2020-12662 | Not reported |
| Ubuntu | unbound | deb | 18.04 | 1.6.7-1ubuntu2.3 | Not reported | USN-4374-1 | Not reported |
| Ubuntu | unbound | deb | 20.04 | 1.9.4-2ubuntu1.1 | Not reported | USN-4374-1 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [libunbound8]Unknown
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
- [libunbound-dev]Unknown
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
- [python3-unbound]Unknown
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
- [unbound]Unknown
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
- [unbound-anchor]Unknown
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
- [unbound-host]Unknown
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · bookworm; dsa · unbound · debian · 12
[Debian 13 (Trixie)]
- [libunbound8]Unknown
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
- [libunbound-dev]Unknown
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
- [python3-unbound]Unknown
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
- [unbound]Unknown
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
- [unbound-anchor]Unknown
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
- [unbound-host]Unknown
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.10.1-1dsa · unbound · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2020_2414.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2020-12662]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-12662]
- [https://osv.dev/vulnerability/DLA-2556-1]
- [https://osv.dev/vulnerability/DSA-4694-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-12662]
- [https://osv.dev/vulnerability/USN-4374-1]
- [https://security-tracker.debian.org/tracker/CVE-2020-12662]
- [https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-12662.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2020/wid-sec-w-2024-0978.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]