CVE-2023-30851

Potential HTTP policy bypass when using header rules in Cilium

Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. This issue only impacts users who have a HTTP policy that applies to multiple `toEndpoints` AND have an allow-all rule in place that affects only one of those endpoints. In such cases, a wildcard rule will be appended to the set of HTTP rules, which could cause bypass of HTTP policies. This issue has been patched in Cilium 1.11.16, 1.12.9, and 1.13.2.

Category

2.6
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.10%
Vendor Advisory github.com
Affected: cilium cilium
Published at:
Updated at:

References

Link Tags
https://github.com/cilium/cilium/security/advisories/GHSA-2h44-x2wx-49f4 vendor advisory
https://github.com/cilium/cilium/releases/tag/v1.11.16 release notes
https://github.com/cilium/cilium/releases/tag/v1.12.9 release notes
https://github.com/cilium/cilium/releases/tag/v1.13.2 release notes

Frequently Asked Questions

What is the severity of CVE-2023-30851?
CVE-2023-30851 has been scored as a low severity vulnerability.
How to fix CVE-2023-30851?
To fix CVE-2023-30851, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-30851 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-30851 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-30851?
CVE-2023-30851 affects cilium cilium.
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