(RHSA-2011:1408) Moderate: rhev-hypervisor security update

The rhev-hypervisor 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.

The RHBA-2011:1254 update introduced a regression in the Linux kernel’s
Ethernet bridge implementation. If a system had an interface in a bridge,
and an attacker on the local network could send packets to that interface,
they could cause a denial of service on that system. (CVE-2011-2942)

A flaw in the Linux kernel could lead to GRO (Generic Receive Offload)
fields being left in an inconsistent state. An attacker on the local
network could use this flaw to trigger a denial of service. GRO is enabled
by default in all network drivers that support it. (CVE-2011-2723)

The way IPv4 and IPv6 protocol sequence numbers and fragment IDs were
generated could allow a man-in-the-middle attacker to inject packets and
possibly hijack connections. Protocol sequence numbers and fragment IDs are
now more random. (CVE-2011-3188)

Non-member VLAN (virtual LAN) packet handling for interfaces in promiscuous
mode and also using the be2net driver could allow an attacker on the local
network to cause a denial of service. (CVE-2011-3347)

Red Hat would like to thank Brent Meshier for reporting CVE-2011-2723; Dan
Kaminsky for reporting CVE-2011-3188; and Somnath Kotur for reporting
CVE-2011-3347.

This updated package provides updated components that include fixes for
numerous 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-2011-2695, CVE-2011-2699, CVE-2011-3191, CVE-2011-1833, CVE-2011-2496,
CVE-2011-3209, CVE-2011-2484, CVE-2011-3131, CVE-2009-4067, CVE-2011-1160,
and CVE-2011-1585 (kernel issues)

CVE-2011-3378 (rpm issues)

Users of Red Hat Enterprise Virtualization Hypervisor should upgrade to
this updated package, which resolves these issues.