{"schema_version":"1.9.0","id":"GHSA-24qp-4xx8-3jvj","published":"2025-03-24T19:05:04Z","modified":"2026-09-10T03:50:06.165871995Z","aliases":["BIT-cilium-2025-30162","BIT-cilium-operator-2025-30162","BIT-hubble-relay-2025-30162","CVE-2025-30162","GO-2025-3560"],"summary":"Cilium East-west traffic not subject to egress policy enforcement for requests via Gateway API load balancers","details":"### Impact\n\nFor Cilium users who:\n- Use Gateway API for Ingress for some services **AND**\n- Use [LB-IPAM](https://docs.cilium.io/en/stable/network/lb-ipam/) or BGP for LB Service implementation **AND**\n- Use network policies to block egress traffic from workloads in a namespace to workloads in other namespaces\n\nEgress traffic from workloads covered by such network policies to LoadBalancers configured by `Gateway` resources will incorrectly be allowed.\n\nLoadBalancer resources not deployed via a Gateway API configuration are not affected by this issue.\n\n### Patches\n\nThis issue was fixed by https://github.com/cilium/proxy/pull/1172.\n\nThis issue affects:\n\n- Cilium v1.15 between v1.15.0 and v1.15.14 inclusive\n- Cilium v1.16 between v1.16.0 and v1.16.7 inclusive\n- Cilium v1.17 between v1.17.0 and v1.17.1 inclusive\n\nThis issue is fixed in:\n\n- Cilium v1.15.15\n- Cilium v1.16.8\n- Cilium v1.17.2\n\n### Workarounds\n\nA Clusterwide Cilium Network Policy can be used to work around this issue for users who are unable to upgrade. An outline of such a policy is provided below:\n\n```\napiVersion: \"cilium.io/v2\"\nkind: CiliumClusterwideNetworkPolicy\nmetadata:\n  name: \"workaround\"\nspec:\n  endpointSelector:\n    matchExpressions:\n    - key: reserved:ingress\n      operator: Exists\n  ingress:\n  - fromEntities:\n    - world\n```\n\n- The policy opens up connectivity from all locations outside the cluster into the Cilium Ingress Gateway.\n- The policy establishes a default deny for all other traffic towards the Cilium Ingress Gateway, including all in-cluster sources.\n- It is possible to tailor the policy to more narrowly allow inbound traffic while creating a default deny posture for traffic between namespaces. Users should edit the policy to bring it in line with the security requirements particular to their environments.\n\n### Acknowledgements\n\nThe Cilium community has worked together with members of the Isovalent team to prepare these mitigations. Special thanks to @jrajahalme for the fix.\n\n### For more information\n\nIf you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at [security@cilium.io](mailto:security@cilium.io). This is a private mailing list for the Cilium security team, and your report will be treated as top priority.","affected":[{"package":{"name":"github.com/cilium/cilium","ecosystem":"Go","purl":"pkg:golang/github.com/cilium/cilium"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.16.0"},{"fixed":"1.16.8"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-24qp-4xx8-3jvj/GHSA-24qp-4xx8-3jvj.json"}},{"package":{"name":"github.com/cilium/cilium","ecosystem":"Go","purl":"pkg:golang/github.com/cilium/cilium"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.17.0"},{"fixed":"1.17.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-24qp-4xx8-3jvj/GHSA-24qp-4xx8-3jvj.json"}},{"package":{"name":"github.com/cilium/cilium","ecosystem":"Go","purl":"pkg:golang/github.com/cilium/cilium"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.15.0"},{"fixed":"1.15.15"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-24qp-4xx8-3jvj/GHSA-24qp-4xx8-3jvj.json"}}],"references":[{"type":"WEB","url":"https://github.com/cilium/cilium/security/advisories/GHSA-24qp-4xx8-3jvj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-30162"},{"type":"WEB","url":"https://github.com/cilium/proxy/pull/1172"},{"type":"WEB","url":"https://docs.cilium.io/en/stable/network/lb-ipam"},{"type":"PACKAGE","url":"https://github.com/cilium/cilium"}],"database_specific":{"cwe_ids":["CWE-863"],"github_reviewed":true,"github_reviewed_at":"2025-03-24T19:05:04Z","nvd_published_at":"2025-03-24T19:15:52Z","severity":"LOW"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N"}]}