SB2019042212 - Credentials management in Kubernetes

Description

This security bulletin contains information about 1 vulnerability.

1) Credentials management (CVE-ID: CVE-2019-11243)

CWE-ID: CWE-255 - Credentials Management

CVSSv4: 9.2 [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]

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()

Remediation

Install update from vendor's website.

References

• http://www.securityfocus.com/bid/108053
• https://github.com/kubernetes/kubernetes/issues/76797
• https://security.netapp.com/advisory/ntap-20190509-0002/