Categories
CVE-2024-47825

CIDR deny policies may not take effect when a more narrow CIDR allow is present

Summary

CIDR deny policies may not take effect when a more narrow CIDR allow is present

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

Affected packages

Bitnami cilium-operator
[{"type":"SEMVER","events":[{"introduced":"1.15.4"},{"fixed":"1.16.0"}]}]
Bitnami cilium
[{"type":"SEMVER","events":[{"introduced":"1.15.4"},{"fixed":"1.16.0"}]}]
Bitnami hubble-relay
[{"type":"SEMVER","events":[{"introduced":"1.14.0"},{"fixed":"1.16.0"}]}]

References

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