Issued:
2010-03-24
Updated:
2010-03-24

RHSA-2010:0172 - Important: rhev-hypervisor security and bug fix update

Synopsis

Important: rhev-hypervisor security and bug fix update

Type/Severity

Security Advisory Important

Topic

An updated rhev-hypervisor package that fixes multiple security issues and several 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.

Description

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 sctp_rcv_ootb() function in the Linux kernel Stream Control Transmission Protocol (SCTP) implementation. A remote attacker could send a specially-crafted SCTP packet to a target system, resulting in a denial of service. (CVE-2010-0008)

A flaw was found in the way the x86 emulator in KVM loaded segment selectors (used for memory segmentation and protection) into segment registers. In some guest system configurations, an unprivileged guest user could leverage this flaw to crash the guest or possibly escalate their privileges within the guest. (CVE-2010-0419)

The KVM x86 emulator implementation was missing a check for the Current Privilege Level (CPL) while accessing debug registers. An unprivileged user in a guest could leverage this flaw to crash the guest. (CVE-2009-3722)

A flaw was found in the USB passthrough handling code in KVM. A specially-crafted USB packet sent from inside a guest could be used to trigger a buffer overflow in the usb_host_handle_control() function, which runs under the QEMU-KVM context on the host. A user in a guest could leverage this flaw to cause a denial of service (guest hang or crash) or possibly escalate their privileges within the host. (CVE-2010-0297)

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-2009-4308, CVE-2010-0003, CVE-2010-0007, CVE-2010-0415, and CVE-2010-0437; and sudo issues CVE-2010-0426 and CVE-2010-0427.

This update also fixes the following bugs:

  • the required storage device driver was not detected correctly by mkdumprd when using multipath devices. When RHEV Hypervisor was installed on a multipath device, kdump was unable to mount the logical volume to store the kernel core dump; therefore, the core dump would not be recorded. With this update, multipath support has been added to the mkdumprd tool, which resolves this issue. (BZ#569459)

As RHEV Hypervisor is based on KVM, the bug fixes from KVM updates RHSA-2010:0126 and RHBA-2010:0158 have been included in this update:

https://rhn.redhat.com/errata/RHSA-2010-0126.html https://rhn.redhat.com/errata/RHBA-2010-0158.html

Users of the Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which corrects these issues.

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

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 This content is not included.http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Virtualization5x86_64

Updated Packages

  • rhev-hypervisor-pxe-5.4-2.1.10.el5_4rhev2_1.noarch.rpm
  • rhev-hypervisor-5.4-2.1.10.el5_4rhev2_1.noarch.rpm

Fixes

CVEs

References

Additional information