CVE-2021-32001 - CVE House
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Status published Medium CVE-2021-32001

K3s/RKE2 bootstrap data is encrypted with empty string if user does not supply a token

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Rancher
Vulnerable Versions:
K3s, RKE2

Timeline

Official Publish: July 28th, 2021
Last Modified: September 16th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)

CWE-311

MITRE ATT&CK TTPs

T1005 Data from Local System
Collection
T1040 Network Sniffing
Credential Access
T1041 Exfiltration Over C2 Channel
Exfiltration
T1078 Valid Accounts
Persistence
T1530 Data from Cloud Storage
Collection