Description
In BIND 9.16.19, 9.17.16. Also, version 9.16.19-S1 of BIND Supported Preview Edition When a vulnerable version of named receives a query under the circumstances described above, the named process will terminate due to a failed assertion check. The vulnerability affects only BIND 9 releases 9.16.19, 9.17.16, and release 9.16.19-S1 of the BIND Supported Preview Edition.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND9 | Stable Branch 9.16.19, Development Branch 9.17.16, Supported Preview Edition 9.16.19-S1 | — |
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.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.16.20-1.4 | openSUSE-SU-2024:10650-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.16.20-r0 | — |
| Alpine v3.23 | bind | 9.16.20-r0 | — |
| Alpine v3.22 | bind | 9.16.20-r0 | — |
| Alpine v3.21 | bind | 9.16.20-r0 | — |
| Alpine v3.20 | bind | 9.16.20-r0 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | bind | 9.16.20-r0 | — |
| Alpine v3.18 | bind | 9.16.20-r0 | — |
| Alpine v3.17 | bind | 9.16.20-r0 | — |
| Alpine v3.16 | bind | 9.16.20-r0 | — |
| Alpine v3.15 | bind | 9.16.20-r0 | — |
| Alpine v3.14 | bind | 9.16.20-r0 | — |
| Alpine v3.13 | bind | 9.16.20-r0 | — |
| Alpine v3.12 | bind | 9.16.20-r0 | — |
| Alpine v3.11 | bind | 9.16.20-r0 | — |
Advisories 1
- openSUSE-SU-2024:10650-1 bind-9.16.20-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://kb.isc.org/v1/docs/cve-2021-25218
- [oss-security] 20210818 ISC has disclosed a vulnerability in BIND (CVE-2021-25218) mailing-list
- [oss-security] 20210820 August BIND maintenance releases contain a defect affecting servers using the map zone file format (was: A vulnerability in BIND (CVE-2021-25218) will be announced 18 August 2021) mailing-list
- FEDORA-2021-fbb258debf vendor-advisory
- https://security.netapp.com/advisory/ntap-20210909-0002/