Description
In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND 9 Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a malformed IXFR triggering the flaw described above, the named process will terminate due to a failed assertion the next time the transferred secondary zone is refreshed.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND9 | Open Source Branch 9.8 9.8.5 through 9.8.8, Open Source Branches 9.9 through 9.11 9.9.3 through versions before 9.11.30, Open Source Branches 9.12 through 9.16 9.12.0 through versions before 9.16.14, Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions before 9.11.30-S1, Suppor… | — |
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 | 1:9.16.15-1 | — |
| Debian 13 | bind9 | 1:9.16.15-1 | — |
| Debian 12 | bind9 | 1:9.16.15-1 | — |
| Debian 10 | bind9 | 1:9.11.5.P4+dfsg-5.1+deb10u5 | DSA-4909-1 |
| Debian 9 | bind9 | 1:9.10.3.dfsg.P4-12.3+deb9u9 | DLA-2647-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | bind9 | 1:9.16.1-0ubuntu2.8 | USN-4929-1 |
| Ubuntu 18.04 LTS | bind9 | 1:9.11.3+dfsg-1ubuntu1.15 | USN-4929-1 |
| Ubuntu 16.04 LTS | bind9 | 1:9.10.3.dfsg.P4-8ubuntu1.19 | USN-4929-1 |
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+esm13 | USN-7739-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | bind +16 | 32:9.11.26-6.el8 | RHSA-2021:4384 |
| RHEL 7 | bind +15 | 32:9.11.4-26.P2.el7_9.7 | RHSA-2021:3325 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | bind +14 | 32:9.11.26-6.el8 | ALSA-2021:4384 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | bind | 2:9.11.26-6.el8 | RLSA-2021:4384 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | bind | 9.16.6-22.7.1 | SUSE-SU-2021:1826-1 |
| SLES 15 SP2 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SLES 15 SP1 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SLES 15 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SLES 12 SP5 | bind | 9.11.22-3.34.1 | SUSE-SU-2021:1468-1 |
Show 21 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | bind | 9.11.22-3.34.1 | SUSE-SU-2021:1468-1 |
| SLES 12 SP3 | bind | 9.9.9P1-63.25.1 | SUSE-SU-2021:1469-1 |
| SLES 12 SP2 | bind | 9.9.9P1-63.25.1 | SUSE-SU-2021:1469-1 |
| SLES 11 SP4 | bind | 9.9.6P1-0.51.26.1 | SUSE-SU-2021:14714-1 |
| SLES for SAP 15 SP1 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SLES for SAP 15 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SLES for SAP 12 SP5 | bind | 9.11.22-3.34.1 | SUSE-SU-2021:1468-1 |
| SLES for SAP 12 SP4 | bind | 9.11.22-3.34.1 | SUSE-SU-2021:1468-1 |
| SLES for SAP 12 SP3 | bind | 9.9.9P1-63.25.1 | SUSE-SU-2021:1469-1 |
| SLE HPC 15 SP1 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SLE HPC 15 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SUSE OpenStack Cloud Crowbar 9 | bind | 9.11.22-3.34.1 | SUSE-SU-2021:1468-1 |
| SUSE OpenStack Cloud Crowbar 8 | bind | 9.9.9P1-63.25.1 | SUSE-SU-2021:1469-1 |
| SUSE OpenStack Cloud 9 | bind | 9.11.22-3.34.1 | SUSE-SU-2021:1468-1 |
| SUSE OpenStack Cloud 8 | bind | 9.9.9P1-63.25.1 | SUSE-SU-2021:1469-1 |
| SUSE Manager Server 4.0 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SUSE Manager Retail Branch Server 4.0 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SUSE Manager Proxy 4.0 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | bind | 9.9.6P1-0.51.26.1 | SUSE-SU-2021:14714-1 |
| SUSE HPE Helion OpenStack 8 | bind | 9.9.9P1-63.25.1 | SUSE-SU-2021:1469-1 |
| SUSE Enterprise Storage 6 | bind | 9.16.6-12.49.1 | SUSE-SU-2021:1471-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.16.20-1.4 | openSUSE-SU-2024:10650-1 |
| openSUSE Leap 15.3 | bind | 9.16.6-22.7.1 | openSUSE-SU-2021:1826-1 |
| openSUSE Leap 15.2 | bind | 9.16.6-lp152.14.19.1 | openSUSE-SU-2021:0668-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.16.15-r0 | — |
| Alpine v3.23 | bind | 9.16.15-r0 | — |
| Alpine v3.22 | bind | 9.16.15-r0 | — |
| Alpine v3.21 | bind | 9.16.15-r0 | — |
| Alpine v3.20 | bind | 9.16.15-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | bind | 9.16.15-r0 | — |
| Alpine v3.18 | bind | 9.16.15-r0 | — |
| Alpine v3.17 | bind | 9.16.15-r0 | — |
| Alpine v3.16 | bind | 9.16.15-r0 | — |
| Alpine v3.15 | bind | 9.16.15-r0 | — |
| Alpine v3.14 | bind | 9.16.15-r0 | — |
| Alpine v3.13 | bind | 9.16.15-r0 | — |
| Alpine v3.12 | bind | 9.16.15-r0 | — |
| Alpine v3.11 | bind | 9.16.15-r0 | — |
| Alpine v3.10 | bind | 9.16.15-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | bind +15 | 32:9.11.4-26.P2.amzn2.5.2 | ALAS2-2021-1651 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | bind +16 | 32:9.11.26-6.el8 | ELSA-2021-4384 |
| Oracle Linux 7 | bind +15 | 32:9.11.4-26.P2.el7_9.7 | ELSA-2021-3325 |
Advisories 23
- ALSA-2021:4384 Moderate: bind security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:3325 Red Hat Security Advisory: bind security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2021:4384 Red Hat Security Advisory: bind security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-7739-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4929-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4909-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2647-1 bind9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:4384 Moderate: bind security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2021:1469-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1471-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1468-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1826-1 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
- SUSE-SU-2021:1826-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0668-1 Security update for bind SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0063 Juniper Junos Space: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 8, 2025
- WID-SEC-2025-2027 Internet Systems Consortium BIND: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Sep 10, 2025
- ICSA-22-069-09 Siemens SINEC INS CISA ICS & IT advisories · May 6, 2025
- SUSE-SU-2021:14714-1 Security update for bind SUSE / openSUSE Security Updates · May 2, 2025
- SSA-389290 SSA-389290: Third-Party Component Vulnerabilities in SINEC INS Siemens ProductCERT · Mar 8, 2022
- ELSA-2021-4384 Moderate: bind security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 16, 2021
- ELSA-2021-3325 Moderate: bind security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 1, 2021
- ALAS2-2021-1651 Moderate: bind security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 22, 2021
References
- https://kb.isc.org/v1/docs/cve-2021-25214
- [oss-security] 20210428 ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216) mailing-list
- [oss-security] 20210429 Re: ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216) mailing-list
- [oss-security] 20210429 Re: ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216) mailing-list
- [oss-security] 20210429 Re: ISC discloses three BIND vulnerabilities (CVE-2021-25214, CVE-2021-25215, and CVE-2021-25216) mailing-list
- DSA-4909 vendor-advisory
- [debian-lts-announce] 20210504 [SECURITY] [DLA 2647-1] bind9 security update mailing-list
- FEDORA-2021-ace61cbee1 vendor-advisory
- FEDORA-2021-47f23870ec vendor-advisory
- https://security.netapp.com/advisory/ntap-20210521-0006/
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf