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Vulnerability · Published Mar 22, 2023 · Assigned by GitHub_M

CVE-2023-28114`cilium-cli` disables etcd authorization for clustermesh clusters

Medium 4.8

In plain English

A medium-severity security flaw in cilium-cli from cilium. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.8Medium
Exploit odds (30 days)0.2%top 91.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

`cilium-cli` is the command line interface to install, manage, and troubleshoot Kubernetes clusters running Cilium. Prior to version 0.13.2,`cilium-cli`, when used to configure cluster mesh functionality, can remove the enforcement of user permissions on the `etcd` store used to mirror local cluster information to remote clusters. Users who have set up cluster meshes using the Cilium Helm chart are not affected by this issue. Due to an incorrect mount point specification, the settings specified by the `initContainer` that configures `etcd` users and their permissions are overwritten when using `cilium-cli` to configure a cluster mesh. An attacker who has already gained access to a valid key and certificate for an `etcd` cluster compromised in this manner could then modify state in that `etcd` cluster. This issue is patched in `cilium-cli` 0.13.2. As a workaround, one may use Cilium's Helm charts to create their cluster.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/cilium/cilium-cli0.13.2GHSA-6f27-3p6c-p5jc
Gogithub.com/cilium/cilium-cli0.13.2GO-2023-1653

Affected products (as reported)

VendorProductVersions
cilium cilium-cli < 0.13.2

Weakness: CWE-280, CWE-755 · Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

References