PT-2023-21235 · Cilium · Cilium

Aanm · Published 2023-03-17 · Updated 2024-08-20 · CVE-2023-27595

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

Name of the Vulnerable Software and Affected Versions Cilium version 1.13.0

Description Cilium is a networking, observability, and security solution with an eBPF-based dataplane. When Cilium is started, there is a short period when Cilium eBPF programs are not attached to the host. During this period, the host does not implement any of Cilium's featureset, which can cause disruption to newly established connections due to the lack of Load Balancing, or can cause Network Policy bypass due to the lack of Network Policy enforcement during the window. This issue impacts any Cilium-managed endpoints on the node, such as Kubernetes Pods, as well as the host network namespace, including Host Firewall.

Recommendations For Cilium version 1.13.0, update to Cilium 1.13.1 or later to resolve the issue. At the moment, there is no information about other workarounds for this vulnerability.

Exploit

Fix

Improper Handling of Exceptional Conditions

Weakness Enumeration

CWE-755

Related Identifiers

BIT-CILIUM-2023-27595

BIT-CILIUM-OPERATOR-2023-27595

BIT-CILIUM-PROXY-2023-27595

BIT-HUBBLE-2023-27595

BIT-HUBBLE-RELAY-2023-27595

BIT-HUBBLE-UI-2023-27595

BIT-HUBBLE-UI-BACKEND-2023-27595

CVE-2023-27595

GHSA-R5X6-W42P-JHPP

GO-2023-1644

Affected Products

Cilium

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27595.json · Exploit
• https://osv.dev/vulnerability/BIT-hubble-relay-2023-27595 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-27595 · Security Note
• https://osv.dev/vulnerability/BIT-hubble-2023-27595 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-hubble-ui-backend-2023-27595 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-27595 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2023-1644 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-r5x6-w42p-jhpp · Vendor Advisory
• https://osv.dev/vulnerability/BIT-cilium-proxy-2023-27595 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-cilium-2023-27595 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-hubble-ui-2023-27595 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-cilium-operator-2023-27595 · Vendor Advisory
• https://github.com/cilium/cilium · Note
• https://github.com/cilium/cilium/pull/24336 · Note
• https://github.com/cilium/cilium/releases/tag/v1.13.1 · Note