Synopsis

Important: xen security update

Type/Severity

Security Advisory: Important

Topic

An updated Xen package to fix multiple security issues is now available for
Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

Description

The Xen package contains the tools for managing the virtual machine monitor
in Red Hat Enterprise Linux virtualization.

The following security flaws are fixed in the updated Xen package:

Joris van Rantwijk found a flaw in the Pygrub utility which is used as a
boot loader for guest domains. A malicious local administrator of a guest
domain could create a carefully crafted grub.conf file which would trigger
the execution of arbitrary code outside of that domain. (CVE-2007-4993)

Tavis Ormandy discovered a heap overflow flaw during video-to-video copy
operations in the Cirrus VGA extension code used in Xen. A malicious local
administrator of a guest domain could potentially trigger this flaw and
execute arbitrary code outside of the domain. (CVE-2007-1320)

Tavis Ormandy discovered insufficient input validation leading to a heap
overflow in the Xen NE2000 network driver. If the driver is in use, a
malicious local administrator of a guest domain could potentially trigger
this flaw and execute arbitrary code outside of the domain. Xen does not
use this driver by default. (CVE-2007-1321)

Users of Xen should update to these erratum packages containing backported
patches which correct these issues.

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/FAQ_58_10188

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 237342 - CVE-2007-1320 xen Cirrus LGD-54XX "bitblt" Heap Overflow
• BZ - 237343 - CVE-2007-1321 xen QEMU NE2000 emulation issues
• BZ - 302801 - CVE-2007-4993 xen guest root can escape to domain 0 through pygrub

CVEs

• CVE-2007-4993
• CVE-2007-1320
• CVE-2007-1321

References

• http://www.redhat.com/security/updates/classification/#important

Red Hat Enterprise Linux Server 5

SRPM
xen-3.0.3-25.0.4.el5.src.rpm	SHA-256: 0d48bc0bf450d331d9a8c02038df7cc48a3f676d7ca14afe7f39b6a2111808d0
x86_64
xen-3.0.3-25.0.4.el5.x86_64.rpm	SHA-256: a7a50c051668befd4d0725b1c47e15d77e1e8fdcb72756c4b8e86c2990b3e9ad
xen-devel-3.0.3-25.0.4.el5.i386.rpm	SHA-256: ceaa3e8dedd6a6749c3c164b7fd1b376842b3fee65c78d54f125f963863319ee
xen-devel-3.0.3-25.0.4.el5.x86_64.rpm	SHA-256: 8780ba43e5d9b67ff3b754b780c23f881cd22721e1ef236d565300045cc4757b
xen-libs-3.0.3-25.0.4.el5.i386.rpm	SHA-256: aeb3004d798e79ac3d1bedf14fb9fb965d530c832e3b1d511ba764e7c4ebeaea
xen-libs-3.0.3-25.0.4.el5.x86_64.rpm	SHA-256: 9b9344e551e1751b2374d39e00e155446ee3484f4cb1fe10b27e3f7dd75151aa
ia64
xen-3.0.3-25.0.4.el5.ia64.rpm	SHA-256: 7a41bba20d790c8ed4cf280e551380e937ae949d602180f7ca84b77b186b6c50
xen-devel-3.0.3-25.0.4.el5.ia64.rpm	SHA-256: 8baccd2a5c65564f02e1ef8989352f58990ad9b098df29f801f87c1b0cd2e715
xen-libs-3.0.3-25.0.4.el5.ia64.rpm	SHA-256: 1314418b40fcda9c117f0fd94f11d8e32b331e6c75235d9050bdfb418923e909
i386
xen-3.0.3-25.0.4.el5.i386.rpm	SHA-256: f8683702af2942d4903c0d23dd2a5859ec1e71fd2ed81a0b3210da9959493547
xen-devel-3.0.3-25.0.4.el5.i386.rpm	SHA-256: ceaa3e8dedd6a6749c3c164b7fd1b376842b3fee65c78d54f125f963863319ee
xen-libs-3.0.3-25.0.4.el5.i386.rpm	SHA-256: aeb3004d798e79ac3d1bedf14fb9fb965d530c832e3b1d511ba764e7c4ebeaea

Red Hat Enterprise Linux Workstation 5

SRPM
xen-3.0.3-25.0.4.el5.src.rpm	SHA-256: 0d48bc0bf450d331d9a8c02038df7cc48a3f676d7ca14afe7f39b6a2111808d0
x86_64
xen-3.0.3-25.0.4.el5.x86_64.rpm	SHA-256: a7a50c051668befd4d0725b1c47e15d77e1e8fdcb72756c4b8e86c2990b3e9ad
xen-devel-3.0.3-25.0.4.el5.i386.rpm	SHA-256: ceaa3e8dedd6a6749c3c164b7fd1b376842b3fee65c78d54f125f963863319ee
xen-devel-3.0.3-25.0.4.el5.x86_64.rpm	SHA-256: 8780ba43e5d9b67ff3b754b780c23f881cd22721e1ef236d565300045cc4757b
xen-libs-3.0.3-25.0.4.el5.i386.rpm	SHA-256: aeb3004d798e79ac3d1bedf14fb9fb965d530c832e3b1d511ba764e7c4ebeaea
xen-libs-3.0.3-25.0.4.el5.x86_64.rpm	SHA-256: 9b9344e551e1751b2374d39e00e155446ee3484f4cb1fe10b27e3f7dd75151aa
i386
xen-3.0.3-25.0.4.el5.i386.rpm	SHA-256: f8683702af2942d4903c0d23dd2a5859ec1e71fd2ed81a0b3210da9959493547
xen-devel-3.0.3-25.0.4.el5.i386.rpm	SHA-256: ceaa3e8dedd6a6749c3c164b7fd1b376842b3fee65c78d54f125f963863319ee
xen-libs-3.0.3-25.0.4.el5.i386.rpm	SHA-256: aeb3004d798e79ac3d1bedf14fb9fb965d530c832e3b1d511ba764e7c4ebeaea

Red Hat Enterprise Linux Desktop 5

SRPM
xen-3.0.3-25.0.4.el5.src.rpm	SHA-256: 0d48bc0bf450d331d9a8c02038df7cc48a3f676d7ca14afe7f39b6a2111808d0
x86_64
xen-libs-3.0.3-25.0.4.el5.i386.rpm	SHA-256: aeb3004d798e79ac3d1bedf14fb9fb965d530c832e3b1d511ba764e7c4ebeaea
xen-libs-3.0.3-25.0.4.el5.x86_64.rpm	SHA-256: 9b9344e551e1751b2374d39e00e155446ee3484f4cb1fe10b27e3f7dd75151aa
i386
xen-libs-3.0.3-25.0.4.el5.i386.rpm	SHA-256: aeb3004d798e79ac3d1bedf14fb9fb965d530c832e3b1d511ba764e7c4ebeaea

Red Hat Enterprise Linux Server from RHUI 5

SRPM
xen-3.0.3-25.0.4.el5.src.rpm	SHA-256: 0d48bc0bf450d331d9a8c02038df7cc48a3f676d7ca14afe7f39b6a2111808d0
x86_64
xen-libs-3.0.3-25.0.4.el5.i386.rpm	SHA-256: aeb3004d798e79ac3d1bedf14fb9fb965d530c832e3b1d511ba764e7c4ebeaea
xen-libs-3.0.3-25.0.4.el5.x86_64.rpm	SHA-256: 9b9344e551e1751b2374d39e00e155446ee3484f4cb1fe10b27e3f7dd75151aa
i386
xen-libs-3.0.3-25.0.4.el5.i386.rpm	SHA-256: aeb3004d798e79ac3d1bedf14fb9fb965d530c832e3b1d511ba764e7c4ebeaea