• Red Hat Satellite 6 Performance Tuning: OS and Web Performance

    Satellite 6 is the next generation Linux systems management tool and is the combined product of many open source projects, including Foreman, Katello, Pulp, Candlepin, and Puppet. Since all of these projects bring different features and functionality, the performance of your Satellite 6 server is essential. This post covers two simple ways to immediately improve performance for the Satellite 6 Server: - Changing your OS tuned profile - Adding an Apache KeepAlive directive to the web...
    Posted 2014-12-10T21:37:28+00:00 - 7
  • Analysis of the CVE-2013-6435 Flaw in RPM

    The RPM Package Manager (RPM) is a powerful command-line driven package management system capable of installing, uninstalling, verifying, querying, and updating software packages. RPM was originally written in 1997 by Erik Troan and Marc Ewing. Since then RPM has been successfully used in all versions of Red Hat Linux and currently in Red Hat Enterprise Linux. RPM offers considerable advantages over traditional open-source software install methodology of building from source via tar balls,...
    Posted 2014-12-10T14:30:50+00:00 - 0
  • Disabling SSLv3 on the client and server

    Recently, some Internet search engines announced that they would prefer websites secured with encryption over those that were not.  Of course there are other reasons why securing your website with encryption is beneficial.  Protecting authentication credentials, mitigating the use of cookies as a means of tracking and allowing access, providing privacy of your users, and authenticating your own server thus protecting the information you are trying to convey to your users.  And while setting up...
    Posted 2014-12-03T14:30:23+00:00 - 0
  • VNC Configurator

    We're proud to introduce a new Red Hat Access Labs app: VNC Configurator Virtual Network Computing (VNC) is a common technology allowing remote desktop control for Red Hat Enterprise Linux systems. Although fully supported on all modern RHEL versions, it does not come installed by default. In order to use it, there are several steps involved with installation and configuration. This app helps guide you through the deployment process by asking a few questions, which will provide a script for...
    Posted 2014-12-01T09:18:26+00:00 - 3
  • Registration Assistant

    We're proud to introduce a new Red Hat Access Labs app: Registration Assistant. The Registration Assistant will guide you towards the best registration option for your Red Hat Enterprise Linux environment. Simply select the Red Hat Enterprise Linux Version and the subscription management technology you are using and the app will provide the appropriate commands to register your system. Some screenshots of the app are included below. Feel free to experiment with the app and let us know what...
    Posted 2014-11-12T21:12:57+00:00 - 0
  • Enterprise Linux 6.5 to 6.6 risk report

    Red Hat Enterprise Linux 6.6 was released the 14th of October, 2014, eleven months since the release of 6.5 in November 2013. So lets use this opportunity to take a quick look back over the vulnerabilities and security updates made in that time, specifically for Red Hat Enterprise Linux 6 Server. Red Hat Enterprise Linux 6 is in its fourth year since release, and will receive security updates until November 30th 2020. Errata count The chart below illustrates the total number of security updates...
    Posted 2014-11-12T14:30:28+00:00 - 0
  • Can SSL 3.0 be fixed? An analysis of the POODLE attack.

    SSL and TLS are cryptographic protocols which allow users to securely communicate over the Internet. Their development history is no different from other standards on the Internet. Security flaws were found with older versions and other improvements were required as technology progressed (for example elliptic curve cryptography or ECC), which led to the creation of newer versions of the protocol. It is easier to write newer standards, and maybe even implement them in code, than to adapt...
    Posted 2014-10-20T14:27:34+00:00 - 0
  • POODLE - An SSL 3.0 Vulnerability (CVE-2014-3566)

    Red Hat Product Security has been made aware of a vulnerability in the SSL 3.0 protocol, which has been assigned CVE-2014-3566. All implementations of SSL 3.0 are affected. This vulnerability allows a man-in-the-middle attacker to decrypt ciphertext using a padding oracle side-channel attack. To mitigate this vulnerability, it is recommended that you explicitly disable SSL 3.0 in favor of TLS 1.1 or later in all affected packages. A brief history Transport Layer Security (TLS) and its...
    Posted 2014-10-15T14:44:40+00:00 - 0
  • The Source of Vulnerabilities, How Red Hat finds out about vulnerabilities.

    Red Hat Product Security track lots of data about every vulnerability affecting every Red Hat product. We make all this data available on our Measurement page and from time to time write various blog posts and reports about interesting metrics or trends. One metric we've not written about since 2009 is the source of the vulnerabilities we fix. We want to answer the question of how did Red Hat Product Security first hear about each vulnerability? Every vulnerability that affects a Red Hat...
    Posted 2014-10-08T13:30:48+00:00 - 0
  • Satellite 6.0 Discovery Plugin

    Satellite 6.0 features automatic bare-metal discovery which is implemented as a PXE-boot live image with minimized Red Hat Enterprise Linux that is running from memory. Once Satellite 6.0 is configured to boot the discovery image for all unknown hosts, new nodes calls home during the start and wait until they are provisioned. Installation and Setup Before we start setting up the plugin and the image, verify the following prerequisites are met: Satellite 6.0.5 with bare-metal provisioning setup...
    Posted 2014-10-02T14:15:13+00:00 - 9
  • Frequently Asked Questions about the Shellshock Bash flaws

    The recent few days have been hectic for everyone who works in the Linux/Unix world. Bash security flaws have rocked the globe leaving people confused, worried, or just frustrated. Now that the storm is over and patches are available for most operating systems, here are the answers to some of the common questions we've been asked: Why are there four CVE assignments? The original flaw in Bash was assigned CVE-2014-6271. Shortly after that issue went public a researcher found a similar flaw that...
    Posted 2014-09-26T11:50:33+00:00 - 0
  • Bash specially-crafted environment variables code injection attack

    Update 2014-09-30 19:30 UTC Questions have arisen around whether Red Hat products are vulnerable to CVE-2014-6277 and CVE-2014-6278.  We have determined that RHSA-2014:1306, RHSA-2014:1311, and RHSA-2014:1312 successfully mitigate the vulnerability and no additional actions need to be taken.   Update 2014-09-26 12:00 UTC We have written a FAQ to address some of the more common questions seen regarding the recent bash issues. Frequently Asked Questions about the Shellshock Bash flaws...
    Posted 2014-09-24T14:00:08+00:00 - 0
  • Kickstart Configuration Tool

    We're proud to introduce a new Red Hat Access Labs app: Kickstart Configuration Tool. Kickstart provides a way for users to automate a Red Hat Enterprise Linux installation. Using kickstart, a system administrator can create a single file containing the answers to all the questions that would normally be asked during a typical installation. Once a kickstart file has been generated it can either be included with boot media or made available on the network for easy and consistent configuration of...
    Posted 2014-09-18T14:22:39+00:00 - 0
  • Enterprise Linux 5.10 to 5.11 risk report

    Red Hat Enterprise Linux 5.11 was released this month (September 2014), eleven months since the release of 5.10 in October 2013. So, as usual, let's use this opportunity to take a look back over the vulnerabilities and security updates made in that time, specifically for Red Hat Enterprise Linux 5 Server. Red Hat Enterprise Linux 5 is in Production 3 phase, being over seven years since general availability in March 2007, and will receive security updates until March 31st 2017. Errata count The...
    Posted 2014-09-18T13:30:49+00:00 - 0
  • TLS landscape

    Transport Layer Security (TLS) or, as it was known in the beginnings of the Internet, Secure Sockets Layer (SSL) is the technology responsible for securing communications between different devices. It is used everyday by nearly everyone using the globe-spanning network. Let's take a closer look at how TLS is used by servers that underpin the World Wide Web and how the promise of security is actually executed. Adoption Hyper Text Transfer Protocol (HTTP) in versions 1.1 and older make encryption...
    Posted 2014-09-10T13:30:54+00:00 - 0
  • Satellite 6 is Here… We Hope You Enjoy It

    The Satellite Team is proud to announce the release of Satellite 6.0. This release is the culmination of several years of collaboration between some incredibly active open source communities, many savvy and technically strong customers, and a very passionate Red Hat engineering team. We have worked together upstream, and downstream through two Managed Design Programs, and two beta cycles. First and foremost, thank you for your efforts and the feedback which have helped us to deliver this next...
    Posted 2014-09-08T13:27:14+00:00 - 34
  • Is your software fixed?

    A common query seen at Red Hat is “our auditor says our Red Hat machines are vulnerable to CVE-2015-1234, is this true?” or “Why hasn’t Red Hat updated software package foo to version 1.2.3?” In other words, our customers (and their auditors) are not sure whether or not we have fixed a security vulnerability, or if a given package is up to date with respect to security issues. In an effort to help our security-conscious customers, Red Hat make this information available in an easy to consume...
    Posted 2014-09-03T13:30:04+00:00 - 1
  • Satellite 6.0 Bare Metal Provisioning Without DHCP

    Satellite 6.0 provisioning fully supports booting over the network (PXE) but it is not always possible to have DHCP and TFTP services under the control of the Satellite server. For these cases, Satellite ships with a plug-in called Bootdisk that allows you to create ISO files that can be written to CD or DVD, or to USB sticks or memory cards. There are two types of boot disk that you can create: per-host and generic images. Two Types of Images You can use the host and subnet data in Satellite...
    Posted 2014-09-02T18:32:39+00:00 - 4
  • Red Hat Satellite and Puppet

    Red Hat Satellite and Puppet Welcome to the second of our blog posts for Satellite. The topic this week is the usage of Puppet with Satellite 5 and 6. If you have not yet heard, Red Hat will be using and supporting Puppet as the configuration management platform within Satellite 6. The Puppet integration comes from many years of hands-on feedback and experiences within The Foreman community from users such as yourself. As part of the Satellite 6 release process we had many customer discussions...
    Posted 2014-08-26T14:05:20+00:00 - 1
  • We are working on some great stuff

    The Satellite Engineering Team at Red Hat is working on some really great features, and we are always looking for ways to tell you all more about what is cooking in the upstream. Lukas Zapletal, in our Brno office, suggested that we start a blog to get some of this information out. The goal of this blog will be for us in Engineering to publish tips and tricks about how to use our products, videos which showcase new features, and to point you at new content on the Customer Portal. If you have...
    Posted 2014-08-19T18:18:01+00:00 - 3
  • Fedora Security Team

    Vulnerabilities in software happen.  When they get fixed it's up to the packager to make those fixes available to the systems using the software.  Duplicating much of the response efforts that Red Hat Product Security performs for Red Hat products, the Fedora Security Team (FST) has recently been created to assist packagers get vulnerability fixes downstream in a timely manner. At the beginning of July, there were over 500 vulnerability tickets open* against Fedora and EPEL.  Many of these...
    Posted 2014-08-13T13:30:31+00:00 - 0
  • Controlling access to smart cards

    Smart cards are increasingly used in workstations as an authentication method. They are mainly used to provide public key operations (e.g., digital signatures) using keys that cannot be exported from the card. They also serve as a data storage, e.g., for the corresponding certificate to the key. In RHEL and Fedora systems low-level access to smart cards is provided using the pcsc-lite daemon, an implementation of the PC/SC protocol, defined by the PC/SC industry consortium. In brief the PC/SC...
    Posted 2014-07-30T13:30:32+00:00 - 0
  • KVM Bridge Configuration

    We're proud to introduce a new Red Hat Access Labs app: KVM Bridge Configuration By default, KVM uses Network Address Translation (NAT) networking through a libvirt-managed bridge called virbr0. You can use a bridged interface to get your guest box to appear as another host on the same network as the hypervisor. This app is designed to help you configure a bridged network interface for KVM using Red Hat Enterprise Linux 5.4 or later. You will have two options: 1.Download an all-in-one script...
    Posted 2014-07-29T02:54:23+00:00 - 2
  • Towards efficient security code audits

    Conducting a code review is often a daunting task, especially when the goal is to find security flaws. They can, and usually are, hidden in all parts and levels of the application - from the lowest level coding errors, through unsafe coding constructs, misuse of APIs, to the overall architecture of the application. Size and quality of the codebase, quality of (hopefully) existing documentation and time restrictions are the main complications of the review. It is therefore useful to have a plan...
    Posted 2014-07-16T13:30:44+00:00 - 0
  • Explore certified partner solutions with the new Red Hat Certification Catalog

    Today, we are excited to announce the addition of a new Red Hat Certification Catalog to the numerous resources within the Customer Portal. Red Hat collaborates with hundreds of companies that develop hardware, devices, plug-ins, software applications, and services that are tested, supported, and certified to run on Red Hat technologies. Empowered with the new Red Hat Certification Catalog, you can explore a wide variety of partner solutions to: Ensure your Red Hat solution is running on...
    Posted 2014-07-14T21:00:01+00:00 - 2

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