RHSA-2010:0095: rhev-hypervisor security and bug fix update

Description

An updated rhev-hypervisor package that fixes security issues and several bugs is now available. This update has been rated as having important security impact by the Red Hat Security Response Team.

The rhev-hypervisor package provides a Red Hat Enterprise Virtualization (RHEV) Hypervisor ISO disk image. The RHEV 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: RHEV Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions. A flaw was found in the IPv6 Extension Header (EH) handling implementation in the Linux kernel. The skb->dst data structure was not properly validated in the ipv6_hop_jumbo() function. This could possibly lead to a remote denial of service. (CVE-2007-4567) The Parallels Virtuozzo Containers team reported two flaws in the routing implementation. If an attacker was able to cause a large enough number of collisions in the routing hash table (via specially-crafted packets) for the emergency route flush to trigger, a deadlock could occur. Secondly, if the kernel routing cache was disabled, an uninitialized pointer would be left behind after a route lookup, leading to a kernel panic. (CVE-2009-4272) A flaw was found in each of the following Intel PRO/1000 Linux drivers in the Linux kernel: e1000 and e1000e. A remote attacker using packets larger than the MTU could bypass the existing fragment check, resulting in partial, invalid frames being passed to the network stack. These flaws could also possibly be used to trigger a remote denial of service. (CVE-2009-4536, CVE-2009-4538) A flaw was found in the Realtek r8169 Ethernet driver in the Linux kernel. Receiving overly-long frames with a certain revision of the network cards supported by this driver could possibly result in a remote denial of service. (CVE-2009-4537) The x86 emulator implementation was missing a check for the Current Privilege Level (CPL) and I/O Privilege Level (IOPL). A user in a guest could leverage these flaws to cause a denial of service (guest crash) or possibly escalate their privileges within that guest. (CVE-2010-0298, CVE-2010-0306) A flaw was found in the Programmable Interval Timer (PIT) emulation. Access to the internal data structure pit_state, which represents the data state of the emulated PIT, was not properly validated in the pit_ioport_read() function. A privileged guest user could use this flaw to crash the host. (CVE-2010-0309) This updated package provides updated components that include fixes for security issues; however, these issues have no security impact for RHEV Hypervisor. These fixes are for kernel issues CVE-2006-6304, CVE-2009-2910, CVE-2009-3080, CVE-2009-3556, CVE-2009-3889, CVE-2009-3939, CVE-2009-4020, CVE-2009-4021, CVE-2009-4138, and CVE-2009-4141; ntp issue CVE-2009-3563; dbus issue CVE-2009-1189; dnsmasq issues CVE-2009-2957 and CVE-2009-2958; gnutls issue CVE-2009-2730; krb5 issue CVE-2009-4212; bind issue CVE-2010-0097; gzip issue CVE-2010-0001; openssl issues CVE-2009-2409 and CVE-2009-4355; and gcc issue CVE-2009-3736. This update also fixes the following bugs: * on systems with a large number of disk devices, USB storage devices may get enumerated after "/dev/sdz", for example, "/dev/sdcd". This was not handled by the udev rules, resulting in a missing "/dev/live" symbolic link, causing installations from USB media to fail. With this update, udev rules correctly handle USB storage devices on systems with a large number of disk devices, which resolves this issue. (BZ#555083) As RHEV Hypervisor is based on KVM, the bug fixes from the KVM update RHSA-2010:0088 have been included in this update: https://rhn.redhat.com/errata/RHSA-2010-0088.html Users of the Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which corrects these issues.