Basics of Keeping Kubernetes Clusters Secure Part 2

We outline security mitigations and settings that should be prioritized in a clustered environment. The second part of our security guide on Kubernetes clusters covers best practices related to worker nodes, the kubelet, pods, and audit logs...

Security Bulletin: Red Hat OpenShift on IBM Cloud is affected by a GNU GRUB2 security vulnerability (CVE-2020-10713)

Summary Red Hat OpenShift on IBM Cloud is affected by a security vulnerability in GNU GRUB2 that could allow a local authenticated attacker to execute arbitrary code on the system. CVE-2020-10713 Vulnerability Details CVEID: CVE-2020-10713 Description: GNU GRUB2 could allow a local authenticated...

Security Bulletin: IBM Cloud Kubernetes Service is affected by a GNU GRUB2 security vulnerability (CVE-2020-10713)

Summary IBM Cloud Kubernetes Service is affected by a security vulnerability in GNU GRUB2 that could allow a local authenticated attacker to execute arbitrary code on the system. CVE-2020-10713 Vulnerability Details CVEID: CVE-2020-10713 Description: GNU GRUB2 could allow a local authenticated...

Security Bulletin: Red Hat OpenShift on IBM Cloud is affected by a Kubernetes kubelet and kube-proxy security vulnerability (CVE-2020-8558)

Summary Red Hat OpenShift on IBM Cloud is affected by a security vulnerability in the Kubernetes kubelet and kube-proxy that could allow neighboring nodes to bypass localhost boundary CVE-2020-8558 Vulnerability Details CVEID: CVE-2020-8558 Description: Kubernetes kube-proxy could allow a remote...

Security Bulletin: IBM Cloud Kubernetes Service is affected by a Kubernetes kubelet security vulnerability (CVE-2020-8557)

Summary IBM Cloud Kubernetes Service is affected by a security vulnerability in the Kubernetes kubelet that could result in the denial of service of a node CVE-2020-8557 Vulnerability Details CVEID: CVE-2020-8557 Description: Kubernetes kubelet is vulnerable to a denial of service, caused by an...

Security Bulletin: IBM Cloud Kubernetes Service is affected by a Kubernetes kubelet and kube-proxy security vulnerability (CVE-2020-8558)

Summary IBM Cloud Kubernetes Service is affected by a security vulnerability in the Kubernetes kubelet and kube-proxy that could allow neighboring nodes to bypass localhost boundary CVE-2020-8558 Vulnerability Details CVEID: CVE-2020-8558 Description: Kubernetes kube-proxy could allow a remote...

Security Bulletin: IBM Cloud Kubernetes Service is affected by a Kubernetes kubelet security vulnerability (CVE-2020-8551)

Summary IBM Cloud Kubernetes Service is affected by a security vulnerability in the Kubernetes kubelet that could lead to a denial of service CVE-2020-8551 Vulnerability Details CVEID: CVE-2020-8551 DESCRIPTION: Kubernetes kubelet API is vulnerable to a denial of service, caused by improper input...

Authorization Bypass

modcluster is vulnerable to authorization bypass. The vulnerability exists as it was found that modcluster allowed worker nodes to register on any virtual host vhost, regardless of the security constraints applied to other vhosts. In a typical environment, there will be one vhost configured...

Security Bulletin: IBM Cloud Kubernetes Service is affected by a Python security vulnerability (CVE-2019-10160)

Summary IBM Cloud Kubernetes Service is vulnerable to CVE-2019-10160 Python security vulnerability which could allow a remote attacker to obtain sensitive information, caused by improper unicode encoding handling. Vulnerability Details CVE-ID: CVE-2019-10160 Description: Python...

Security Bulletin: IBM Cloud Kubernetes Service is affected by Kubernetes security vulnerabilities (CVE-2019-9512, CVE-2019-9514)

Summary IBM Cloud Kubernetes Service is affected by security vulnerabilities in the net/http library of the Go language that affects all Kubernetes components. These vulnerabilities can result in a denial-of-service attack against a process with an HTTP or HTTPS listener CVE-2019-9512 and...

Security Bulletin: IBM Cloud Kubernetes Service is affected by Kubernetes security vulnerability (CVE-2019-11248)

Summary IBM Cloud Kubernetes Service is affected by a security vulnerability in the Kubelet healthz port that exposes the debugging endpoint on localhost CVE-2019-11248 Vulnerability Details CVE-ID: CVE-2019-11248 Description: Kubernetes could allow a remote attacker to obtain sensitive...

Security Bulletin: IBM Cloud Kubernetes Service is affected by Linux Kernel security vulnerabilities (CVE-2019-11477, CVE-2019-11478, CVE-2019-11479)

Summary IBM Cloud Kubernetes Service is vulnerable to CVE-2019-11477, CVE-2019-11478 and CVE-2019-11479 Linux Kernel security vulnerabilities which could result in a denial of service attack. Vulnerability Details CVE-ID: CVE-2019-11477 Description: Linux Kernel is vulnerable to a denial of...

Security Bulletin: IBM Cloud Kubernetes Service is affected by a CNI security vulnerability

Summary IBM Cloud Kubernetes Service is affected by a CNI security vulnerability which could result in weaker than expected security. Vulnerability Details CVE-ID: CVE-2019-9946 Description: Kubernetes could provide weaker than expected security, caused by an interaction when paired with the...

CVE-2019-3780 Cloud Foundry Container Runtime Leaks IAAS Credentials

Cloud Foundry Container Runtime, versions prior to 0.28.0, deploys K8s worker nodes that contains a configuration file with IAAS credentials. A malicious user with access to the k8s nodes can obtain IAAS credentials allowing the user to escalate privileges to gain access to the IAAS account...

Security Bulletin: IBM Cloud Kubernetes Service is affected by a privilege escalation vulnerability in runc

Summary IBM Cloud Kubernetes Service is affected by a security vulnerability in runc which could allow an attacker that is authorized to run a process as root inside a container to execute arbitrary commands with root privileges on the container’s host system. Vulnerability Details CVE-ID:...

JBoss 'mod_cluster'安全绕过漏洞

Bugtraq ID: 51554 CVE ID：CVE-2011-4608 JBOSS是一个基于J2EE的开放源代码的应用服务器。 modcluster允许worker节点在任意虚拟主机vhost上注册，而无视应用在其他虚拟主机上的安全性限制。在某些环境下，一个vhost配置为内部worker节点，而另一个配置为服务外部内容。远程攻击者可以利用此缺陷通过没有配置应用安全限制的外部虚拟主机注册为攻击者控制的worker节点，然后使用worker节点服务恶意内容，截获验证凭据，劫持用户会话。 0 Red Hat JBoss Enterprise Web Server for RHEL 6...

Important: Red Hat Security Advisory: mod_cluster-native security update

An updated modcluster-native package that fixes one security issue is now available for JBoss Enterprise Web Platform 5.1.2 for Red Hat Enterprise Linux 4, 5, and 6. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System...

mod_cluster: malicious worker nodes can register on any vhost

modcluster in JBoss Enterprise Application Platform 5.1.2 for Red Hat Linux allows worker nodes to register with arbitrary virtual hosts, which allows remote attackers to bypass intended access restrictions and provide malicious content, hijack sessions, and steal credentials by registering from ...

Important: Red Hat Security Advisory: mod_cluster-native security update

An update for the Native components for JBoss Enterprise Application Platform 5.1.2 that fixes one security issue is now available from the Red Hat Customer Portal. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System...

Important: Red Hat Security Advisory: mod_cluster-native security update

An updated modcluster-native package that fixes one security issue is now available for JBoss Enterprise Application Platform 5.1.2 for Red Hat Enterprise Linux 4, 5, and 6. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scorin...