CVE-2021-32001 K3s/RKE2 bootstrap data is encrypted with empty string if user does not supply a token
Attackers with datastore access can decrypt cluster secrets because bootstrap data uses an empty string key when no token is supplied.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-32001?
CVE-2021-32001 is a medium-severity vulnerability in SUSE Rancher, published on 28 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
K3s in SUSE Rancher allows any user with direct access to the datastore, or a copy of a datastore backup, to extract the cluster's confidential keying material (cluster certificate authority private keys, secrets encryption configuration passphrase, etc.) and decrypt it, without having to know the token value. This issue affects: SUSE Rancher K3s version v1.19.12+k3s1, v1.20.8+k3s1, v1.21.2+k3s1 and prior versions; RKE2 version v1.19.12+rke2r1, v1.20.8+rke2r1, v1.21.2+rke2r1 and prior versions.
Weakness: CWE-311
Which versions are affected by CVE-2021-32001?
It affects 2 products.
Products include Suse Rancher K3s, Suse Rancher Rke2.
How do I fix CVE-2021-32001?
No fix has been published for CVE-2021-32001 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-32001 being exploited?
There is no known exploitation of CVE-2021-32001 in the wild and no public exploit code.