CVE-2023-48713 Knative Serving vulnerable to attacker-controlled pod causing denial of service of autoscaler
An attacker controlling a pod's metrics endpoint can cause a denial of service in the Knative autoscaler via unbound memory allocation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-48713?
CVE-2023-48713 is a medium-severity denial of service vulnerability in knative serving, published on 28 Nov 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Knative Serving builds on Kubernetes to support deploying and serving of applications and functions as serverless containers. An attacker who controls a pod to a degree where they can control the responses from the /metrics endpoint can cause Denial-of-Service of the autoscaler from an unbound memory allocation bug. This is a DoS vulnerability, where a non-privileged Knative user can cause a DoS for the cluster. This issue has been patched in version 0.39.0.
Weakness: CWE-400
Which versions are affected by CVE-2023-48713?
3 open source packages ship an affected version, including knative.dev/serving. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
knative.dev/serving Go | All versions | 0.39.0 |
knative.dev/serving Go | All versions | 0.39.0 |
knative.dev/serving Go | All versions | 0.39.0 |
Products include Knative Serving.
How do I fix CVE-2023-48713?
Upgrade knative.dev/serving to 0.39.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-48713 being exploited?
There is no known exploitation of CVE-2023-48713 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-LH10039, CLEANSTART-2026-NU71361, GHSA-qmvj-4qr9-v547, GO-2023-2355.