Improper Authorization Affecting github.com/cilium/cilium/bpf package, versions >=1.13.0 <1.13.1>=1.12.0 <1.12.8<1.11.15


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.17% (56th percentile)

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  • Snyk IDSNYK-GOLANG-GITHUBCOMCILIUMCILIUMBPF-3364518
  • published19 Mar 2023
  • disclosed17 Mar 2023
  • creditysksuzuki

Introduced: 17 Mar 2023

CVE-2023-27594  (opens in a new tab)
CWE-285  (opens in a new tab)

How to fix?

Upgrade github.com/cilium/cilium/bpf to version 1.13.1, 1.12.8, 1.11.15 or higher.

Overview

Affected versions of this package are vulnerable to Improper Authorization when routing IPv6 traffic.

Note: This is exploitable only when:

  1. Cilium is routing IPv6 traffic, and

  2. Kube-proxy is used for service handling, and

  3. NodePorts are used to route traffic to pods.

Cilium's kube-proxy replacement feature is not affected by this vulnerability.

Workaround

Disable IPv6 routing (IPv6 is disabled by default).

References

CVSS Scores

version 3.1