SB2016020303 - Multiple vulnerabilities in Kubernetes

Description

This security bulletin contains information about 2 vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2016-1906)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/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.

Openshift allows remote attackers to gain privileges by updating a build configuration that was created with an allowed type to a type that is not allowed.

2) Improper access control (CVE-ID: CVE-2016-1905)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N]

The vulnerability allows a remote authenticated user to manipulate data.

The API server in Kubernetes does not properly check admission control, which allows remote authenticated users to access additional resources via a crafted patched object.

Remediation

Install update from vendor's website.

References

• https://access.redhat.com/errata/RHSA-2016:0070
• https://access.redhat.com/errata/RHSA-2016:0351
• https://github.com/openshift/origin/issues/6556
• https://github.com/openshift/origin/pull/6576
• https://github.com/kubernetes/kubernetes/issues/19479