When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or slash has been added to allowed...
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)。
When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or slash has been added to allowed characters, path traversal can happen if the domain component is directory partial. This allows inadvertently reading /etc/passwd (or some other path which ends with passwd). If this file contains passwords, it can be used to authenticate wrongly, or if this is userdb, it can unexpectly make system users appear valid users. Upgrade to fixed version, or use different authentication scheme that does not rely on paths. Alternatively you can also ensure that the per-domain passwd files are in some other location, such as /etc/dovecot/auth/%d. No publicly available exploits are known.
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
- Debian DEBIAN-CVE-2026-0394 dovecot 修正版: 1:2.3.13+dfsg1-2+deb11u3
参照URL
- advisory documentation.open-xchange.com
- advisory github.com
- advisory nvd.nist.gov