AusCERT - ESB-2009.1678 - [RedHat] rhev-hypervisor: Denial of service

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ESB-2009.1678 - [RedHat] rhev-hypervisor: Denial of service - Existing account
Date: 24 December 2009
References: ESB-2009.1542 ESB-2009.1588 ESB-2009.1621 ESB-2009.1643 ESB-2010.0484

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1678
          Important: rhev-hypervisor security and bug fix update
                             24 December 2009

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           rhev-hypervisor
Publisher:         Red Hat
Operating System:  Red Hat
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-4033 CVE-2009-4031 CVE-2009-3726
                   CVE-2009-3720 CVE-2009-3621 CVE-2009-3620
                   CVE-2009-3613 CVE-2009-3612 CVE-2009-3560
                   CVE-2009-3547 CVE-2009-3490 CVE-2009-3286
                   CVE-2009-3228 CVE-2009-2908 CVE-2009-2695

Reference:         ESB-2009.1643
                   ESB-2009.1621
                   ESB-2009.1588
                   ESB-2009.1542

Original Bulletin: 
   https://rhn.redhat.com/errata/RHSA-2009-1692.html

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                   Red Hat Security Advisory

Synopsis:          Important: rhev-hypervisor security and bug fix update
Advisory ID:       RHSA-2009:1692-01
Product:           Red Hat Enterprise Virtualization
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-1692.html
Issue date:        2009-12-23
CVE Names:         CVE-2009-3613 CVE-2009-4031 
=====================================================================

1. Summary:

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.

2. Relevant releases/architectures:

RHEV Hypervisor - noarch

3. 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 Realtek r8169 Ethernet driver in the Linux kernel.
pci_unmap_single() presented a memory leak that could lead to IOMMU space
exhaustion and a system crash. An attacker on the local network could
trigger this flaw by using jumbo frames for large amounts of network
traffic. (CVE-2009-3613)

On x86 platforms, the do_insn_fetch() function did not limit the amount of
instruction bytes fetched per instruction. Users in guest operating systems
could leverage this flaw to cause large latencies on SMP hosts that could
lead to a local denial of service on the host operating system. This update
fixes this issue by imposing the architecturally-defined 15 byte length
limit for instructions. (CVE-2009-4031)

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-2009-2695, CVE-2009-2908,
CVE-2009-3228, CVE-2009-3286, CVE-2009-3547, CVE-2009-3612, CVE-2009-3620,
CVE-2009-3621, and CVE-2009-3726; acpid issue CVE-2009-4033; expat issues
CVE-2009-3560 and CVE-2009-3720; and wget issue CVE-2009-3490.

This update also fixes the following bugs:

* the scsi_dh_rdac driver was updated to recognize the Sun StorageTek
Flexline 380. This driver is now also loaded into initrd to handle passive
paths correctly. Without this initrd change, lots of errors could occur
during boot, increasing boot time. (BZ#545909)

* during the firstboot network configuration of the RHEV Hypervisor, it was
only possible to specify NTP servers by their IP addresses if the RHEV
Hypervisor system was configured with a static IP address. With this
update, hostnames can also be used to specify NTP servers. (BZ#545923)

* with the default settings, performance problems occurred when using the
qcow2 image format. This could cause guest operating system installations
to take hours. With this update, performance patches have been backported
to resolve this issue. (BZ#520693)

* when using the virtual vm8086 mode, bugs in the emulated hardware task
switching implementation may have, in some situations, caused older guest
operating systems to malfunction. (BZ#532031)

* Windows Server 2003 guests (32-bit) with more than 4GB of memory may have
crashed during reboot when using the default RHEV Hypervisor settings.
(BZ#532043)

* guests continued to run after encountering disk read errors. This could
have led to their file systems becoming corrupted (but not the host's),
notably in environments that use networked storage. With this update,
guests will now pause on disk read and write errors. (BZ#537334, BZ#540406)

* the para-virtualized block driver (virtio-blk) silently ignored read
errors when accessing disk images. With this update, the driver correctly
signals the read error to the guest. (BZ#537334)

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

4. Solution:

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

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

529137 - CVE-2009-3613 kernel: flood ping cause out-of-iommu error and panic when mtu larger than 1500
541160 - CVE-2009-4031 kernel: KVM: x86 emulator: limit instructions to 15 bytes

6. Package List:

RHEV Hypervisor:

Source:
rhev-hypervisor-5.4-2.1.3.el5_4rhev2_1.src.rpm

noarch:
rhev-hypervisor-5.4-2.1.3.el5_4rhev2_1.noarch.rpm
rhev-hypervisor-pxe-5.4-2.1.3.el5_4rhev2_1.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://www.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2009-3613.html
https://www.redhat.com/security/data/cve/CVE-2009-4031.html
http://www.redhat.com/security/updates/classification/#important
http://redhat.com/docs/en-US/Red_Hat_Enterprise_Virtualization/Red_Hat_Enterprise_Virtualization_Hypervisor/5.4-2.1/html/RHEV-Hypervisor_Deployment_Guide/

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2009 Red Hat, Inc.
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