CVE-2021-25215

Description

In BIND 9.0.0 -> 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 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 query for a record triggering the flaw described above, the named process will terminate due to a failed assertion check. The vulnerability affects all currently maintained BIND 9 branches (9.11, 9.11-S, 9.16, 9.16-S, 9.17) as well as all other versions of BIND 9.

How to fix CVE-2021-25215

To remediate CVE-2021-25215, 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

Is CVE-2021-25215 being exploited?

Low — EPSS is 2.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 9.16.15-r0
• from 0, < 1:9.16.15-1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2021-25215
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-25215