By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable...
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Alpine Linux ALPINE-CVE-2018-5743 bind 修正版: 9.14.1-r0
- Debian DEBIAN-CVE-2018-5743 bind9 修正版: 1:9.11.5.P4+dfsg-4
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)。
By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743.
参照URL
- advisory kb.isc.org
- advisory synology.com
- web support.f5.com