Description
In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND9 | 9.0.0 – < unspecified, unspecified – < 9.11.22, 9.12.0 – < unspecified, unspecified – < 9.16.6, 9.17.0 – < unspecified, unspecified – < 9.17.4, 9.9.3-S1 – < Supported Preview* | unspecified |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | bind9 | 1:9.16.6-1 | — |
| Debian 13 | bind9 | 1:9.16.6-1 | — |
| Debian 12 | bind9 | 1:9.16.6-1 | — |
| Debian 10 | bind9 | 1:9.11.5.P4+dfsg-5.1+deb10u2 | DSA-4752-1 |
| Debian 9 | bind9 | 1:9.10.3.dfsg.P4-12.3+deb9u7 | DLA-2355-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | bind9 | 1:9.16.1-0ubuntu2.3 | USN-4468-1 |
| Ubuntu 18.04 LTS | bind9 | 1:9.11.3+dfsg-1ubuntu1.13 | USN-4468-1 |
| Ubuntu 16.04 LTS | bind9 | 1:9.10.3.dfsg.P4-8ubuntu1.17 | USN-4468-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | bind9 | 1:9.9.5.dfsg-3ubuntu0.19+esm3 | USN-4468-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | bind +16 | 32:9.11.20-5.el8 | RHSA-2020:4500 |
| RHEL 7 | bind +15 | 32:9.11.4-26.P2.el7_9.2 | RHSA-2020:5011 |
| RHEL 6 | bind +5 | 32:9.8.2-0.68.rc1.el6_10.8 | RHSA-2020:4183 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.7 EUS | bind +15 | 32:9.11.4-9.P2.el7_7.3 | RHSA-2020:5203 |
| RHEL 7.6 EUS | bind +13 | 32:9.9.4-74.el7_6.5 | RHSA-2020:4992 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLES 15 SP2 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
| SLES 15 SP1 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLES 15 SP1 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
| SLES 15 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLES 15 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
| SLES 12 SP5 | bind | 9.11.22-3.22.1 | SUSE-RU-2020:2915-1 |
| SLES 12 SP4 | bind | 9.11.22-3.22.1 | SUSE-RU-2020:2915-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | bind | 9.9.9P1-63.28.1 | SUSE-SU-2021:2876-1 |
| SLES 12 SP2 | bind | 9.9.9P1-63.28.1 | SUSE-SU-2021:2876-1 |
| SLES for SAP 15 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLES for SAP 15 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
| SLES for SAP 12 SP5 | bind | 9.11.22-3.22.1 | SUSE-RU-2020:2915-1 |
| SLES for SAP 12 SP4 | bind | 9.11.22-3.22.1 | SUSE-RU-2020:2915-1 |
| SLES for SAP 12 SP3 | bind | 9.9.9P1-63.28.1 | SUSE-SU-2021:2876-1 |
| SLE HPC 15 | bind | 9.16.6-12.32.1 | SUSE-SU-2020:2914-1 |
| SLE HPC 15 | sysuser-tools | 2.0-4.2.8 | SUSE-SU-2020:2914-1 |
| SUSE OpenStack Cloud Crowbar 9 | bind | 9.11.22-3.22.1 | SUSE-RU-2020:2915-1 |
| SUSE OpenStack Cloud Crowbar 8 | bind | 9.9.9P1-63.28.1 | SUSE-SU-2021:2876-1 |
| SUSE OpenStack Cloud 9 | bind | 9.11.22-3.22.1 | SUSE-RU-2020:2915-1 |
| SUSE OpenStack Cloud 8 | bind | 9.9.9P1-63.28.1 | SUSE-SU-2021:2876-1 |
| SUSE HPE Helion OpenStack 8 | bind | 9.9.9P1-63.28.1 | SUSE-SU-2021:2876-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.16.20-1.4 | openSUSE-SU-2024:10650-1 |
| openSUSE Leap 15.2 | bind | 9.16.6-lp152.14.3.1 | openSUSE-SU-2020:1699-1 |
| openSUSE Leap 15.2 | libuv | 1.18.0-lp152.4.3.1 | openSUSE-SU-2020:1699-1 |
| openSUSE Leap 15.2 | sysuser-tools | 2.0-lp152.5.3.1 | openSUSE-SU-2020:1699-1 |
| openSUSE Leap 15.1 | bind | 9.16.6-lp151.11.9.1 | openSUSE-SU-2020:1701-1 |
| openSUSE Leap 15.1 | libuv | 1.18.0-lp151.3.3.1 | openSUSE-SU-2020:1701-1 |
| openSUSE Leap 15.1 | sysuser-tools | 2.0-lp151.4.3.1 | openSUSE-SU-2020:1701-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.16.6-r0 | — |
| Alpine v3.23 | bind | 9.16.6-r0 | — |
| Alpine v3.22 | bind | 9.16.6-r0 | — |
| Alpine v3.21 | bind | 9.16.6-r0 | — |
| Alpine v3.20 | bind | 9.16.6-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | bind | 9.16.6-r0 | — |
| Alpine v3.18 | bind | 9.16.6-r0 | — |
| Alpine v3.17 | bind | 9.16.6-r0 | — |
| Alpine v3.16 | bind | 9.16.6-r0 | — |
| Alpine v3.15 | bind | 9.16.6-r0 | — |
| Alpine v3.14 | bind | 9.16.6-r0 | — |
| Alpine v3.13 | bind | 9.16.6-r0 | — |
| Alpine v3.12 | bind | 9.16.6-r0 | — |
| Alpine v3.11 | bind | 9.16.6-r0 | — |
| Alpine v3.10 | bind | 9.16.6-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | bind +15 | 32:9.11.4-26.P2.amzn2.2 | ALAS2-2020-1564 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | bind +16 | 32:9.11.20-5.el8 | ELSA-2020-4500 |
| Oracle Linux 7 | bind +15 | 32:9.11.4-26.P2.el7_9.2 | ELSA-2020-5011 |
Advisories 18
- RHSA-2020:4500 Red Hat Security Advisory: bind security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 2, 2026
- RHSA-2020:4992 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:5011 Red Hat Security Advisory: bind security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:5203 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:4183 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4468-2 bind9 vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4468-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4752-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2355-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-RU-2020:2915-1 Recommended update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2914-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1699-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2876-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10650-1 bind-9.16.20-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1701-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2020-1564 Moderate: bind security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Dec 8, 2020
- ELSA-2020-5011 Moderate: bind security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 17, 2020
- ELSA-2020-4500 Moderate: bind security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
References
- https://kb.isc.org/docs/cve-2020-8622
- FEDORA-2020-a02b7a0f21 vendor-advisory
- USN-4468-1 vendor-advisory
- USN-4468-2 vendor-advisory
- DSA-4752 vendor-advisory
- FEDORA-2020-14c194e5af vendor-advisory
- [debian-lts-announce] 20200829 [SECURITY] [DLA 2355-1] bind9 security update mailing-list
- GLSA-202008-19 vendor-advisory
- openSUSE-SU-2020:1699 vendor-advisory
- openSUSE-SU-2020:1701 vendor-advisory
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://security.netapp.com/advisory/ntap-20200827-0003/
- https://www.synology.com/security/advisory/Synology_SA_20_19