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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.0306 Important: rhev-hypervisor6 security, bug fix, and enhancement update 1 March 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: rhev-hypervisor6 Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Root Compromise -- Existing Account Modify Arbitrary Files -- Existing Account Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2013-0311 CVE-2013-0310 CVE-2013-0309 CVE-2013-0190 CVE-2013-0157 CVE-2012-5536 CVE-2012-4542 CVE-2012-4508 CVE-2012-3955 CVE-2012-3411 CVE-2011-4355 CVE-2011-3149 CVE-2011-3148 Reference: ESB-2013.0262 ESB-2013.0261 ESB-2013.0259 ESB-2013.0248 ESB-2013.0243 ESB-2012.1144 ESB-2012.1139 ESB-2012.0910 ESB-2012.0882 ESB-2011.1114 ESB-2011.1067 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2013-0579.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: rhev-hypervisor6 security, bug fix, and enhancement update Advisory ID: RHSA-2013:0579-01 Product: Red Hat Enterprise Virtualization Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0579.html Issue date: 2013-02-28 CVE Names: CVE-2012-3411 CVE-2012-4542 CVE-2013-0311 ===================================================================== 1. Summary: An updated rhev-hypervisor6 package that fixes three security issues, various bugs, and adds an enhancement is now available. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: RHEV Hypervisor for RHEL-6 - noarch 3. Description: The rhev-hypervisor6 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent. Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions. A flaw was found in the way the vhost kernel module handled descriptors that spanned multiple regions. A privileged guest user could use this flaw to crash the host or, potentially, escalate their privileges on the host. (CVE-2013-0311) It was found that the default SCSI command filter does not accommodate commands that overlap across device classes. A privileged guest user could potentially use this flaw to write arbitrary data to a LUN that is passed-through as read-only. (CVE-2012-4542) It was discovered that dnsmasq, when used in combination with certain libvirtd configurations, could incorrectly process network packets from network interfaces that were intended to be prohibited. A remote, unauthenticated attacker could exploit this flaw to cause a denial of service via DNS amplification attacks. (CVE-2012-3411) The CVE-2012-4542 issue was discovered by Paolo Bonzini of Red Hat. This updated package provides updated components that include fixes for several security issues. These issues had no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers: CVE-2012-3955 (dhcp issue) CVE-2011-4355 (gdb issue) CVE-2012-4508, CVE-2013-0190, CVE-2013-0309, and CVE-2013-0310 (kernel issues) CVE-2012-5536 (openssh issue) CVE-2011-3148 and CVE-2011-3149 (pam issues) CVE-2013-0157 (util-linux-ng issue) This updated Red Hat Enterprise Virtualization Hypervisor package also fixes the following bugs: * Previously, the Administration Portal would always display the option to upgrade the Red Hat Enterprise Virtualization Hypervisor ISO regardless of whether or not the selected host was up-to-date. Now, the VDSM version compatibility is considered and the upgrade message only displays if there is an upgrade relevant to the host available. (BZ#853092) * An out of date version of libvirt was included in the Red Hat Enterprise Virtualization Hypervisor 6.4 package. As a result, virtual machines with supported CPU models were not being properly parsed by libvirt and failed to start. A more recent version of libvirt has been included in this updated hypervisor package. Virtual machines now start normally. (BZ#895078) As well, this update adds the following enhancement: * Hypervisor packages now take advantage of the installonlypkg function provided by yum. This allows for multiple versions of the hypervisor package to be installed on a system concurrently without making changes to the yum configuration as was previously required. (BZ#863579) This update includes the ovirt-node build from RHBA-2013:0556: https://rhn.redhat.com/errata/RHBA-2013-0556.html Users of the Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which fixes these issues and adds this enhancement. 4. Solution: This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258 To upgrade Hypervisors in Red Hat Enterprise Virtualization environments using the disk image provided by this package, refer to: https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Hypervisor_Deployment_Guide/chap-Deployment_Guide-Upgrading_Red_Hat_Enterprise_Virtualization_Hypervisors.html 5. Bugs fixed (http://bugzilla.redhat.com/): 833033 - CVE-2012-3411 libvirt+dnsmasq: DNS configured to answer DNS queries from non-virtual networks 835162 - rhev-hypervisor 6.4 release 853092 - rhev-h: supported vdsm compatibility versions should be supplied along with rhev-h ISOs 863579 - RFE: Support installonlypkgs functionality for rhev-hypervisor packages 875360 - CVE-2012-4542 kernel: block: default SCSI command filter does not accomodate commands overlap across device classes 912905 - CVE-2013-0311 kernel: vhost: fix length for cross region descriptor 6. Package List: RHEV Hypervisor for RHEL-6: noarch: rhev-hypervisor6-6.4-20130221.0.el6.noarch.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2012-3411.html https://www.redhat.com/security/data/cve/CVE-2012-4542.html https://www.redhat.com/security/data/cve/CVE-2013-0311.html https://access.redhat.com/security/updates/classification/#important https://rhn.redhat.com/errata/RHBA-2013-0556.html https://access.redhat.com/knowledge/articles/11258 https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Hypervisor_Deployment_Guide/chap-Deployment_Guide-Upgrading_Red_Hat_Enterprise_Virtualization_Hypervisors.html 8. Contact: The Red Hat security contact is <secalert@redhat.com>. 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