CIDR deny policies may not take effect when a more narrow CIDR allow is present
概要
CIDR deny policies may not take effect when a more narrow CIDR allow is present
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)。
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.14.0 and prior to versions 1.14.16 and 1.15.10, a policy rule denying a prefix that is broader than /32 may be ignored if there is a policy rule referencing a more narrow prefix (CIDRSet or toFQDN) and this narrower policy rule specifies either enableDefaultDeny: false or - toEntities: all. Note that a rule specifying toEntities: world or toEntities: 0.0.0.0/0 is insufficient, it must be to entity all.This issue has been patched in Cilium v1.14.16 and v1.15.10. As this issue only affects policies using enableDefaultDeny: false or that set toEntities to all, some workarounds are available. For users with policies using enableDefaultDeny: false, remove this configuration option and explicitly define any allow rules required. For users with egress policies that explicitly specify toEntities: all, use toEntities: world.
出典: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
影響パッケージ
参照URL
- advisory github.com
- web nvd.nist.gov