National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-5256 Detail

Description

CoreOS Tectonic 1.7.x before 1.7.9-tectonic.4 and 1.8.x before 1.8.4-tectonic.3 mounts a direct proxy to the kubernetes cluster at /api/kubernetes/ which is accessible without authentication to Tectonic and allows an attacker to directly connect to the kubernetes API server. Unauthenticated users are able to list all Namespaces through the Console, resulting in an information disclosure. Tectonic's exposure of an unauthenticated API endpoint containing information regarding the internal state of the cluster can provide an attacker with information that may assist in other attacks against the cluster. For example, an attacker may not have the permissions required to list all namespaces in the cluster but can instead leverage this vulnerability to enumerate the namespaces and then begin to check each namespace for weak authorization policies that may allow further escalation of privileges.

Source:  MITRE
Description Last Modified:  05/18/2018

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Hyperlink Resource
https://coreos.com/blog/tectonic-namespace-information-disclosure-vulnerability-patched
https://coreos.com/tectonic/releases/#1.8.4-tectonic.3

Technical Details

Vulnerability Type (View All)

Quick Info

CVE Dictionary Entry:
CVE-2018-5256
NVD Published Date:
05/18/2018
NVD Last Modified:
05/18/2018