CVE-2023-34242 json
Cilium vulnerable to information leakage via incorrect ReferenceGrant handling
published 2023-06-15 3 y ago modified 2026-09-10 1 mo ago also BIT-cilium-2023-34242 , BIT-cilium-operator-2023-34242 , BIT-cilium-proxy-2023-34242 , BIT-hubble-2023-34242 , BIT-hubble-relay-2023-34242 , BIT-hubble-ui-2023-34242 , BIT-hubble-ui-backend-2023-34242 , EUVD-2023-1875 , GHSA-r7wr-4w5q-55m6 , GO-2023-1862
- cvss
- 3.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to version 1.13.4, when Gateway API is enabled in Cilium, the absence of a check on the namespace in which a ReferenceGrant is created could result in Cilium unintentionally gaining visibility of secrets (including certificates) and services across namespaces. An attacker on an affected cluster can leverage this issue to use cluster secrets that should not be visible to them, or communicate with services that they should not have access to. Gateway API functionality is disabled by default. This vulnerability is fixed in Cilium release 1.13.4. As a workaround, restrict the creation of `ReferenceGrant` resources to admin users by using Kubernetes RBAC.
Patch / fix
- go github.com/cilium/cilium 1.13.4
- bitnami cilium 1.13.4
- bitnami cilium-operator 1.13.4
- bitnami cilium-proxy 1.13.4
- bitnami hubble 1.13.4
- bitnami hubble-relay 1.13.4
- bitnami hubble-ui 1.13.4
- bitnami hubble-ui-backend 1.13.4
- cilium cilium 1.13.4
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 22 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.4 | CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N |
| GitHub | 3.1 | 3.4 | CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| OSV | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/cilium/cilium | >=1.13.0, <1.13.4 |
1.13.4 |
| bitnami | cilium | <1.13.4 |
1.13.4 |
| bitnami | cilium-operator | <1.13.4 |
1.13.4 |
| bitnami | cilium-proxy | <1.13.4 |
1.13.4 |
| bitnami | hubble | <1.13.4 |
1.13.4 |
| bitnami | hubble-relay | <1.13.4 |
1.13.4 |
| bitnami | hubble-ui | <1.13.4 |
1.13.4 |
| bitnami | hubble-ui-backend | <1.13.4 |
1.13.4 |
Affected products
- cilium cilium
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/cilium/cilium/security/advisories/GHSA-r7wr-4w5q-55m6
web, third-party-advisory, advisory
-
github.com
/cilium/cilium/releases/tag/v1.13.4
web, release-notes, article
-
nvd.nist.gov
/vuln/detail/CVE-2023-34242
advisory, web
-
github.com
/cilium/cilium
package
Sources
- CVE List CVE-2023-34242
- GitHub Advisory GHSA-r7wr-4w5q-55m6
- NVD CVE-2023-34242
- OSV BIT-cilium-2023-34242
- OSV BIT-cilium-operator-2023-34242
- OSV BIT-cilium-proxy-2023-34242
- OSV BIT-hubble-2023-34242
- OSV BIT-hubble-relay-2023-34242
- OSV BIT-hubble-ui-2023-34242
- OSV BIT-hubble-ui-backend-2023-34242
- OSV GO-2023-1862
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