-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: rhev-hypervisor6 security and bug fix update Advisory ID: RHSA-2013:0746-01 Product: Red Hat Enterprise Virtualization Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0746.html Issue date: 2013-04-23 CVE Names: CVE-2013-1591 CVE-2013-1796 CVE-2013-1797 CVE-2013-1798 ===================================================================== 1. Summary: An updated rhev-hypervisor6 package that fixes several security issues and various bugs 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 KVM handled guest time updates when the buffer the guest registered by writing to the MSR_KVM_SYSTEM_TIME machine state register (MSR) crossed a page boundary. A privileged guest user could use this flaw to crash the host or, potentially, escalate their privileges, allowing them to execute arbitrary code at the host kernel level. (CVE-2013-1796) A potential use-after-free flaw was found in the way KVM handled guest time updates when the GPA (guest physical address) the guest registered by writing to the MSR_KVM_SYSTEM_TIME machine state register (MSR) fell into a movable or removable memory region of the hosting user-space process (by default, QEMU-KVM) on the host. If that memory region is deregistered from KVM using KVM_SET_USER_MEMORY_REGION and the allocated virtual memory reused, a privileged guest user could potentially use this flaw to escalate their privileges on the host. (CVE-2013-1797) A flaw was found in the way KVM emulated IOAPIC (I/O Advanced Programmable Interrupt Controller). A missing validation check in the ioapic_read_indirect() function could allow a privileged guest user to crash the host, or read a substantial portion of host kernel memory. (CVE-2013-1798) An integer overflow flaw was discovered in one of pixman's manipulation routines. If a remote attacker could trick an application using pixman into performing a certain manipulation, it could cause the application to crash or, possibly, execute arbitrary code with the privileges of the user running the application. (CVE-2013-1591) Red Hat would like to thank Andrew Honig of Google for reporting CVE-2013-1796, CVE-2013-1797, and CVE-2013-1798. This updated package provides updated components that include fixes for various security issues. These issues have no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers: CVE-2013-2266 (a bind issue) CVE-2012-5195, CVE-2012-5526, CVE-2012-6329, and CVE-2013-1667 (perl issues) This update contains the fixes from the following errata: ovirt-node: RHBA-2013:0745 libvirt: RHBA-2013:0725 vdsm: RHBA-2013:0704 kernel: RHSA-2013:0744 Users of the Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which corrects these issues. 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/site/documentation/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/): 910149 - CVE-2013-1591 pixman: stack-based buffer overflow 917012 - CVE-2013-1796 kernel: kvm: buffer overflow in handling of MSR_KVM_SYSTEM_TIME 917013 - CVE-2013-1797 kernel: kvm: after free issue with the handling of MSR_KVM_SYSTEM_TIME 917017 - CVE-2013-1798 kernel: kvm: out-of-bounds access in ioapic indirect register reads 950154 - rhev-hypervisor 6.4 Update 2 release 6. Package List: RHEV Hypervisor for RHEL-6: noarch: rhev-hypervisor6-6.4-20130415.0.el6_4.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-2013-1591.html https://www.redhat.com/security/data/cve/CVE-2013-1796.html https://www.redhat.com/security/data/cve/CVE-2013-1797.html https://www.redhat.com/security/data/cve/CVE-2013-1798.html https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Hypervisor_Deployment_Guide/chap-Deployment_Guide-Upgrading_Red_Hat_Enterprise_Virtualization_Hypervisors.html https://rhn.redhat.com/errata/RHBA-2013-0745.html https://rhn.redhat.com/errata/RHBA-2013-0725.html https://rhn.redhat.com/errata/RHBA-2013-0704.html https://rhn.redhat.com/errata/RHSA-2013-0744.html 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2013 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFRdtu3XlSAg2UNWIIRAl/0AJ9P5wonXGAJr6g9xz1vFEDV4AZQ0gCgmRtO vj3ueloqFXefp29zE4FJBhc= =9DCZ -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce