RHEL 5 : rhev-hypervisor (RHSA-2011:1408)

This script is Copyright (C) 2014-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing a security update.

Description :

An updated rhev-hypervisor package that fixes several security issues
is now available.

The Red Hat Security Response Team has rated this update as having
moderate 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.

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.

See also :

https://www.redhat.com/security/data/cve/CVE-2011-2723.html
https://www.redhat.com/security/data/cve/CVE-2011-2942.html
https://www.redhat.com/security/data/cve/CVE-2011-3188.html
https://www.redhat.com/security/data/cve/CVE-2011-3347.html
https://rhn.redhat.com/errata/RHBA-2011-1254.html
http://rhn.redhat.com/errata/RHSA-2011-1408.html

Solution :

Update the affected rhev-hypervisor package.

Risk factor :

Medium / CVSS Base Score : 6.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 5.9
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 79280 ()

Bugtraq ID: 48929
49289
50312
50313

CVE ID: CVE-2011-2723
CVE-2011-2942
CVE-2011-3188
CVE-2011-3347

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