Credentials management in Kubernetes - CVE-2019-11243
Published: April 22, 2019 / Updated: August 8, 2020
Vulnerability identifier: #VU35979
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2019-11243
CWE-ID: CWE-255
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Kubernetes
Affected software:
Kubernetes
Kubernetes
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
In Kubernetes v1.12.0-v1.12.4 and v1.13.0, the rest.AnonymousClientConfig() method returns a copy of the provided config, with credentials removed (bearer token, username/password, and client certificate/key data). In the affected versions, rest.AnonymousClientConfig() did not effectively clear service account credentials loaded using rest.InClusterConfig()
How to mitigate CVE-2019-11243
Install update from vendor's website.