CVE-2024-42488: Policy bypass for Host Firewall policy due to race condition in Cilium agent

August 15, 2024

A race condition in the Cilium agent can cause the agent to ignore labels that should be applied to a node. This could in turn cause CiliumClusterwideNetworkPolicies intended for nodes with the ignored label to not apply, leading to policy bypass.

References

github.com/advisories/GHSA-q7w8-72mr-vpgw
github.com/cilium/cilium
github.com/cilium/cilium/commit/aa44dd148a9be95e07782e4f990e61678ef0abf8
github.com/cilium/cilium/pull/33511
github.com/cilium/cilium/security/advisories/GHSA-q7w8-72mr-vpgw
nvd.nist.gov/vuln/detail/CVE-2024-42488

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