CVE-2018-1002105 Information

Description

In all Kubernetes versions prior to v1.10.11 v1.11.5 and v1.12.3 incorrect handling of error responses to proxied upgrade requests in the kube-apiserver allowed specially crafted requests to establish a connection through the Kubernetes API server to backend servers then send arbitrary requests over the same connection directly to the backend authenticated with the Kubernetes API server’s TLS credentials used to establish the backend connection.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00041.html http://www.openwall.com/lists/oss-security/2019/06/28/2 http://www.openwall.com/lists/oss-security/2019/07/06/3 http://www.openwall.com/lists/oss-security/2019/07/06/4 http://www.securityfocus.com/bid/106068 https://access.redhat.com/errata/RHSA-2018:3537 https://access.redhat.com/errata/RHSA-2018:3549 https://access.redhat.com/errata/RHSA-2018:3551 https://access.redhat.com/errata/RHSA-2018:3598 https://access.redhat.com/errata/RHSA-2018:3624 https://access.redhat.com/errata/RHSA-2018:3742 https://access.redhat.com/errata/RHSA-2018:3752 https://access.redhat.com/errata/RHSA-2018:3754 https://github.com/evict/poc_CVE-2018-1002105 https://github.com/kubernetes/kubernetes/issues/71411 https://groups.google.com/forum/!topic/kubernetes-announce/GVllWCg6L88 https://security.netapp.com/advisory/ntap-20190416-0001/ https://www.coalfire.com/The-Coalfire-Blog/December-2018/Kubernetes-Vulnerability-What-You-Can-Should-Do https://www.exploit-db.com/exploits/46052/ https://www.exploit-db.com/exploits/46053/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8