KernelCare Blog

KernelCare Blog

by / Monday, 27 June 2016
New vulnerability makes it easy to escape from the container

CVE-2016-4997 and CVE-2016-4998 were issued for a vulnerability that lets user inside container to escalate priveleges and escape the containment. The issue affects Virtuozzo, OpenVZ, LXC and Docker containers.

If you are running KernelCare -- your servers are already patched, and safe. If you...

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by / Tuesday, 14 June 2016
Hackers are using local DoS attack using CVE-2016-4581 against hosting provider

Distributions have yet to patch CVE-2016-4581 in CentOS/RHEL/CloudLinux 7 kernels. At the same time, the vulnerability is already known to be used in attacks against hosting providers to crash servers. We are working hard to release new CloudLinux 7 kernel that fixes this bug. 

Yet, if you want...

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Topic: in CloudLinux OS Blog KernelCare Blog


by / Monday, 23 May 2016
How to reduce downtime of managed servers - Liquid Web knows

Liquid Web rolls out KernelCare to 20K managed servers

Liquid Web is one of the most well-respected companies in web hosting. Their 30,000+ customers rely on Liquid Web’s deep technical expertise and a variety of high-performance servers and hosting products. Rolling out KernelCare to 20,000...

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by / Wednesday, 18 May 2016
Ubuntu LTS 16.04 includes livepatch - now what?

Livepatch, a technology to apply patches to a running kernel, has been available for some time. Now Ubuntu LTS 16.04 became the first major Linux distribution to enable it in their kernel.

We’ve been asked what this really means, and does it make KernelCare obsolete? The answer is: not at...

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by / Monday, 25 April 2016
How to use a single key to register multiple KernelCare servers

KernelCare is often deployed on a large number of servers. Adding those servers one by one is a hassle. In that case, KernelCare key can be used to deploy and register multiple servers at once.

Registration is still straightforward:

$ kcarectl --register YOUR_KEY

The key can be obtained from CLN...

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by / Thursday, 21 April 2016
KernelCare supports many distributions, but does it work with your kernel?

We often get a question whether a particular kernel is supported by KernelCare. We support a large number of distributions and kernel versions, such as CentOS/RHEL/CL 5,6 & 7, Debian, Ubuntu, Virtuozzo & Proxmox VE. List of all supported distributions, kernels, as well as patches for them is...

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by / Tuesday, 19 April 2016
Rackspace rebooted their Docker servers, maybe something they could have avoided?

A few days ago, the Rackspace’s Carina team have undergone a scheduled maintenance update to address multiple issues in the Linux kernel which affected Carina users. The fix required a reboot, and the team worked diligently on updating all the docker servers to rectify the issue. Though it...

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by / Friday, 11 March 2016
Debian 7 & 8 kernels patched to latest with KernelCare

Debian 7 kernels updated to linux-3.2.73-2+deb7u3

Debian 8 kernels updated to linux-3.16.7-ckt20-1+deb8u4
 
Systems with AUTO_UPDATE=True (DEFAULT) in /etc/sysconfig/kcare/kcare. conf will automatically update, and no action is needed for them.

You can manually update the server by...

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by / Thursday, 10 March 2016
KernelCare prevents from attacks fast - releases patches sometimes even before the native OS updates its kernel

You might say that KernelCare lags slightly behind the upstream distributions of patches. This, however, is normal, and regardless of the delay, most of the time you will be protected by KernelCare much faster than you would do the reboot yourself. The main cause of such delay is that upstream...

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by / Thursday, 10 March 2016
KernelCare fan-base is growing as we reach 50,000 server installs

I cannot say that I am not proud of the fact that our customer install base has grown so substantially. In the past year, KernelCare has more than tripled server installs and is still CloudLinux’s fastest growing product. Companies like Dell and LiquidWeb have deployed KernelCare to keep...

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