CVE-2021-25214
bind9 - security update
6.5
MEDIUM
CVSS 3.1
EPSS 2.3%
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.
How to fix CVE-2021-25214
To remediate CVE-2021-25214, upgrade the affected package to a fixed version below.
- —upgrade to 9.16.15-r0 or later
- —upgrade to 1:9.16.15-1 or later
- —upgrade to 1:9.10.3.dfsg.P4-12.3+deb9u9 or later
- —upgrade to 1:9.11.5.P4+dfsg-5.1+deb10u5 or later
Is CVE-2021-25214 being exploited?
Low — EPSS is 2.3%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 9.16.15-r0
- from 0, < 1:9.16.15-1
- from 0, < 1:9.10.3.dfsg.P4-12.3+deb9u9
- from 0, < 1:9.11.5.P4+dfsg-5.1+deb10u5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |