NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by ta...
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)。
NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation information by querying Unbound for a second level subdomain which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound checks the validity of parent delegation records before using cached delegation information.
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-2022-30698 unbound 修正版: 1.16.2-r0
- Debian DEBIAN-CVE-2022-30698 unbound 修正版: 1.13.1-1+deb11u1
- Ubuntu UBUNTU-CVE-2022-30698 unbound
参照URL
- advisory security.gentoo.org
- advisory nlnetlabs.nl
- web lists.debian.org
- web lists.fedoraproject.org
- web lists.fedoraproject.org