The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they...

原文の説明

取得元が公開している説明をそのまま載せています (多くは英語)。

The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time.
This issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, and 9.20.9-S1 through 9.20.24-S1.

出典: OSV.dev (Open Source Vulnerabilities) OSV

影響パッケージ

Alpine:v3.22 bind

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.26-r0"}]}]

Alpine:v3.23 bind

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.26-r0"}]}]

Alpine:v3.24 bind

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.26-r0"}]}]

参照URL

advisory security.alpinelinux.org