Detections
Analytics
Oracle Linux 7 : kubernetes / kubeadm-upgrade / kubeadm-ha-setup (ELSA-2019-4593)
high Nessus Plugin ID 180683
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Synopsis
The remote Oracle Linux host is missing one or more security updates.Description
The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-4593 advisory.- Cloud Native Computing Foundation (CNCF) CNI (Container Networking Interface) 0.7.4 has a network firewall misconfiguration which affects Kubernetes. The CNI 'portmap' plugin, used to setup HostPorts for CNI, inserts rules at the front of the iptables nat chains; which take precedence over the KUBE- SERVICES chain. Because of this, the HostPort/portmap rule could match incoming traffic even if there were better fitting, more specific service definition rules like NodePorts later in the chain. The issue is fixed in CNI 0.7.5 and Kubernetes 1.11.9, 1.12.7, 1.13.5, and 1.14.0. (CVE-2019-9946)
- The kubectl cp command allows copying files between containers and the user machine. To copy files from a container, Kubernetes creates a tar inside the container, copies it over the network, and kubectl unpacks it on the user's machine. If the tar binary in the container is malicious, it could run any code and output unexpected, malicious results. An attacker could use this to write files to any path on the user's machine when kubectl cp is called, limited only by the system permissions of the local user. The untar function can both create and follow symbolic links. The issue is resolved in kubectl v1.11.9, v1.12.7, v1.13.5, and v1.14.0. (CVE-2019-1002101)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
Plugin Details
Severity: High
ID: 180683
File Name: oraclelinux_ELSA-2019-4593.nasl
Version: 1.0
Type: local
Agent: unix
Published: 9/7/2023
Updated: 9/7/2023
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5.8
Temporal Score: 4.5
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P
CVSS Score Source: CVE-2019-1002101
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS Score Source: CVE-2019-9946
Vulnerability Information
CPE: cpe:/o:oracle:linux:7, p-cpe:/a:oracle:linux:kubeadm, p-cpe:/a:oracle:linux:kubeadm-ha-setup, p-cpe:/a:oracle:linux:kubeadm-upgrade, p-cpe:/a:oracle:linux:kubectl, p-cpe:/a:oracle:linux:kubelet, p-cpe:/a:oracle:linux:kubernetes-cni, p-cpe:/a:oracle:linux:kubernetes-cni-plugins
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 4/13/2019
Vulnerability Publication Date: 3/28/2019