Cilium with misconfigured toGroups in policies can lead to unrestricted egress traffic
Description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.16.17, 1.17.10, and 1.18.4, CiliumNetworkPolicys which use egress.toGroups.aws.securityGroupsIds to reference AWS security group IDs that do not exist or are not attached to any network interface may unintentionally allow broader outbound access than intended by the policy authors. In such cases, the toCIDRset section of the derived policy is not generated, which means outbound traffic may be permitted to more destinations than originally intended. This issue has been patched in versions 1.16.17, 1.17.10, and 1.18.4. There are no workarounds for this issue.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/cilium/ciliumGo | >= 1.18.0, < 1.18.4 | 1.18.4 |
Ciliumgithub.com/cilium/ciliumGo | >= 1.17.0, < 1.17.10 | 1.17.10 |
github.com/cilium/ciliumGo | < 1.16.17 | 1.16.17 |
Affected products
12- osv-coords11 versionspkg:apk/chainguard/hubble-uipkg:apk/chainguard/hubble-ui-backendpkg:apk/chainguard/hubble-ui-backend-fipspkg:apk/wolfi/hubble-uipkg:apk/wolfi/hubble-ui-backendpkg:bitnami/ciliumpkg:bitnami/cilium-operatorpkg:bitnami/hubble-relaypkg:golang/ciliumgithub.com/cilium/ciliumpkg:golang/github.com/cilium/ciliumpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6
< 0.13.3-r3+ 10 more
- (no CPE)range: < 0.13.3-r3
- (no CPE)range: < 0.13.3-r3
- (no CPE)range: < 0.13.3-r3
- (no CPE)range: < 0.13.3-r3
- (no CPE)range: < 0.13.3-r3
- (no CPE)range: < 1.16.17
- (no CPE)range: < 1.16.17
- (no CPE)range: < 1.16.17
- (no CPE)range: >= 1.17.0, < 1.17.10
- (no CPE)range: >= 1.18.0, < 1.18.4
- (no CPE)range: < 0.0.20251230T014957-150000.1.134.1
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-38pp-6gcp-rqvmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-64715ghsaADVISORY
- github.com/cilium/cilium/commit/a385856b59c8289cc7273fa3a3062bbf0ef96c97ghsax_refsource_MISCWEB
- github.com/cilium/cilium/releases/tag/v1.16.17ghsax_refsource_MISCWEB
- github.com/cilium/cilium/releases/tag/v1.17.10ghsax_refsource_MISCWEB
- github.com/cilium/cilium/releases/tag/v1.18.4ghsax_refsource_MISCWEB
- github.com/cilium/cilium/security/advisories/GHSA-38pp-6gcp-rqvmghsax_refsource_CONFIRMWEB
News mentions
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