CVE-2024-52529CWE-755

Layer 7 policy enforcement may not occur in policies with wildcarded port ranges in Cilium

Medium · published November 25, 2024

CVSS v3.1
5.8
EPSS
1%
Percentile
43.3
In the wild
Unconfirmed
What it is

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. For users with the following configuration: 1. An allow policy that selects a Layer 3 destination and a port range `AND` 2. A Layer 7 allow policy that selects a specific port within the first policy's range the Layer 7 enforcement would not occur for the traffic selected by the Layer 7 policy. This issue only affects users who use Cilium's port range functionality, which was introduced in Cilium v1.16. This issue is patched in PR #35150. This issue affects Cilium v1.16 between v1.16.0 and v1.16.3 inclusive. This issue is patched in Cilium v1.16.4. Users are advised to upgrade. Users with network policies that match the pattern described above can work around the issue by rewriting any policies that use port ranges to individually specify the ports permitted for traffic.

The record
Technical detail
CVSS v3.1
5.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00520 · 43.3th percentile
Weakness
CWE-755 · Improper Handling of Exceptional Conditions
Published
2024-11-25T18:49Z
EPSS history
Timeline
  • 25 NOV 18:49Z
    Layer 7 policy enforcement may not occur in policies with wildcarded port ranges in Cilium
    cvelistv5