Vulnerability Name:

CVE-2020-35514 (CCN-202911)

Assigned:2020-12-17
Published:2021-01-11
Updated:2021-06-11
Summary:An insecure modification flaw in the /etc/kubernetes/kubeconfig file was found in OpenShift. This flaw allows an attacker with access to a running container which mounts /etc/kubernetes or has local access to the node, to copy this kubeconfig file and attempt to add their own node to the OpenShift cluster. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects versions before openshift4/ose-machine-config-operator v4.7.0-202105111858.p0.
CVSS v3 Severity:7.0 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.0 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:4.4 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
6.0 Medium (CCN CVSS v2 Vector: AV:L/AC:H/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-266
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2020-35514

Source: CCN
Type: Red Hat Bugzilla - Bug 1914714
CVE-2020-35514 openshift/machine-config-operator: /etc/kubernetes/kubeconfig is given incorrect privileges

Source: MISC
Type: Issue Tracking, Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1914714

Source: XF
Type: UNKNOWN
redhat-cve202035514-sec-bypass(202911)

Source: CCN
Type: OpenShift GIT Repository
Restrict default file mode for /etc/kuberentes/kubeconfig #2202

Vulnerable Configuration:Configuration 1:
  • cpe:/a:redhat:openshift:*:*:*:*:*:*:*:* (Version < 4.7.0)
  • OR cpe:/a:redhat:openshift:4.7.0:-:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:redhat:openshift_container_platform:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    redhat openshift *
    redhat openshift 4.7.0 -
    redhat openshift container platform -