CVE-2022-23652 Privilege escalation using hop-by-hop Connection header
An authenticated attacker can escalate privileges to cluster-admin via a malicious Connection header in capsule-proxy.
- 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-2022-23652?
CVE-2022-23652 is a high-severity vulnerability in clastix capsule-proxy, published on 22 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious `Connection` header to start a privilege escalation attack towards the Kubernetes API Server. This vulnerability allows for an exploit of the `cluster-admin` Role bound to `capsule-proxy`. There are no known workarounds for this issue.
Weakness: CWE-287
Which versions are affected by CVE-2022-23652?
3 open source packages ship an affected version, including github.com/clastix/capsule-proxy. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/clastix/capsule-proxy Go | All versions | 0.2.1 |
github.com/clastix/capsule-proxy Go | All versions | 0.2.1 |
github.com/clastix/capsule-proxy Go | All versions | 0.2.1 |
Products include Clastix Capsule-Proxy.
How do I fix CVE-2022-23652?
Upgrade github.com/clastix/capsule-proxy to 0.2.1 or later.
Is CVE-2022-23652 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-23652 exists.
Other vulnerabilities in clastix capsule-proxy
Sources
Also known as GHSA-9cwv-cppx-mqjm, GO-2022-0329.