Executive Summary

Summary
Titlexen security and bug fix update
Informations
NameRHSA-2008:0194First vendor Publication2008-05-13
VendorRedHatLast vendor Modification2008-05-13
Severity (Vendor) ImportantRevision01

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score7.2Attack RangeLocal
Cvss Impact Score10Attack ComplexityLow
Cvss Expoit Score3.9AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated xen packages that fix several security issues and a bug are 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 RHEL Desktop Multi OS (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux (v. 5 server) - i386, ia64, x86_64 RHEL Virtualization (v. 5 server) - i386, ia64, x86_64

3. Description:

The xen packages contain tools for managing the virtual machine monitor in Red Hat Virtualization.

These updated packages fix the following security issues:

Daniel P. Berrange discovered that the hypervisor's para-virtualized framebuffer (PVFB) backend failed to validate the format of messages serving to update the contents of the framebuffer. This could allow a malicious user to cause a denial of service, or compromise the privileged domain (Dom0). (CVE-2008-1944)

Markus Armbruster discovered that the hypervisor's para-virtualized framebuffer (PVFB) backend failed to validate the frontend's framebuffer description. This could allow a malicious user to cause a denial of service, or to use a specially crafted frontend to compromise the privileged domain (Dom0). (CVE-2008-1943)

Chris Wright discovered a security vulnerability in the QEMU block format auto-detection, when running fully-virtualized guests. Such fully-virtualized guests, with a raw formatted disk image, were able to write a header to that disk image describing another format. This could allow such guests to read arbitrary files in their hypervisor's host. (CVE-2008-2004)

Ian Jackson discovered a security vulnerability in the QEMU block device drivers backend. A guest operating system could issue a block device request and read or write arbitrary memory locations, which could lead to privilege escalation. (CVE-2008-0928)

Tavis Ormandy found that QEMU did not perform adequate sanity-checking of data received via the "net socket listen" option. A malicious local administrator of a guest domain could trigger this flaw to potentially execute arbitrary code outside of the domain. (CVE-2007-5730)

Steve Kemp discovered that the xenbaked daemon and the XenMon utility communicated via an insecure temporary file. A malicious local administrator of a guest domain could perform a symbolic link attack, causing arbitrary files to be truncated. (CVE-2007-3919)

As well, in the previous xen packages, it was possible for Dom0 to fail to flush data from a fully-virtualized guest to disk, even if the guest explicitly requested the flush. This could cause data integrity problems on the guest. In these updated packages, Dom0 always respects the request to flush to disk.

Users of xen are advised to upgrade to these updated packages, which resolve 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/FAQ_58_10188

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

350421 - CVE-2007-3919 xen xenmon.py / xenbaked insecure temporary file accesss 360381 - CVE-2007-5730 QEMU Buffer overflow via crafted "net socket listen" option 433560 - CVE-2008-0928 Qemu insufficient block device address range checking 435495 - [RHEL5.2]: LTC41676-Xen full virt has data integrity issue 443078 - CVE-2008-1943 PVFB backend fails to validate frontend's framebuffer description 443390 - CVE-2008-1944 PVFB SDL backend chokes on bogus screen updates 444583 - CVE-2008-2004 qemu/kvm/xen: qemu block format auto-detection vulnerability

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2008-0194.html

CWE : Common Weakness Enumeration

idName
CWE-119Failure to Constrain Operations within the Bounds of a Memory Buffer
CWE-264Permissions, Privileges, and Access Controls
CWE-200Information Exposure
CWE-59Improper Link Resolution Before File Access ('Link Following')

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:9913
 
Oval ID: oval:org.mitre.oval:def:9913
Title: (1) xenbaked and (2) xenmon.py in Xen 3.1 and earlier allow local users to truncate arbitrary files via a symlink attack on /tmp/xenq-shm.
Description: (1) xenbaked and (2) xenmon.py in Xen 3.1 and earlier allow local users to truncate arbitrary files via a symlink attack on /tmp/xenq-shm.
Family: unix Class: vulnerability
Reference(s): CVE-2007-3919
Version: 5
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:18680
 
Oval ID: oval:org.mitre.oval:def:18680
Title: DSA-1395-1 xen-3.0 - insecure temporary files
Description: Steve Kemp from the Debian Security Audit project discovered that xen-utils, a collection of XEN administrative tools, used temporary files insecurely within the xenmon tool allowing local users to truncate arbitrary files.
Family: unix Class: patch
Reference(s): DSA-1395-1
CVE-2007-3919
Version: 7
Platform(s): Debian GNU/Linux 4.0
Product(s): xen-3.0
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:10000
 
Oval ID: oval:org.mitre.oval:def:10000
Title: Heap-based buffer overflow in QEMU 0.8.2, as used in Xen and possibly other products, allows local users to execute arbitrary code via crafted data in the "net socket listen" option, aka QEMU "net socket" heap overflow. NOTE: some sources have used CVE-2007-1321 to refer to this issue as part of "NE2000 network driver and the socket code," but this is the correct identifier for the individual net socket listen vulnerability.
Description: Heap-based buffer overflow in QEMU 0.8.2, as used in Xen and possibly other products, allows local users to execute arbitrary code via crafted data in the "net socket listen" option, aka QEMU "net socket" heap overflow. NOTE: some sources have used CVE-2007-1321 to refer to this issue as part of "NE2000 network driver and the socket code," but this is the correct identifier for the individual net socket listen vulnerability.
Family: unix Class: vulnerability
Reference(s): CVE-2007-5730
Version: 5
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:9706
 
Oval ID: oval:org.mitre.oval:def:9706
Title: Qemu 0.9.1 and earlier does not perform range checks for block device read or write requests, which allows guest host users with root privileges to access arbitrary memory and escape the virtual machine.
Description: Qemu 0.9.1 and earlier does not perform range checks for block device read or write requests, which allows guest host users with root privileges to access arbitrary memory and escape the virtual machine.
Family: unix Class: vulnerability
Reference(s): CVE-2008-0928
Version: 5
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:10338
 
Oval ID: oval:org.mitre.oval:def:10338
Title: Buffer overflow in the backend of XenSource Xen Para Virtualized Frame Buffer (PVFB) 3.0 through 3.1.2 allows local users to cause a denial of service (crash) and possibly execute arbitrary code via a crafted description of a shared framebuffer.
Description: Buffer overflow in the backend of XenSource Xen Para Virtualized Frame Buffer (PVFB) 3.0 through 3.1.2 allows local users to cause a denial of service (crash) and possibly execute arbitrary code via a crafted description of a shared framebuffer.
Family: unix Class: vulnerability
Reference(s): CVE-2008-1943
Version: 5
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:10868
 
Oval ID: oval:org.mitre.oval:def:10868
Title: Buffer overflow in the backend framebuffer of XenSource Xen Para-Virtualized Framebuffer (PVFB) Message 3.0 through 3.0.3 allows local users to cause a denial of service (SDL crash) and possibly execute arbitrary code via "bogus screen updates," related to missing validation of the "format of messages."
Description: Buffer overflow in the backend framebuffer of XenSource Xen Para-Virtualized Framebuffer (PVFB) Message 3.0 through 3.0.3 allows local users to cause a denial of service (SDL crash) and possibly execute arbitrary code via "bogus screen updates," related to missing validation of the "format of messages."
Family: unix Class: vulnerability
Reference(s): CVE-2008-1944
Version: 5
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:11021
 
Oval ID: oval:org.mitre.oval:def:11021
Title: The drive_init function in QEMU 0.9.1 determines the format of a raw disk image based on the header, which allows local guest users to read arbitrary files on the host by modifying the header to identify a different format, which is used when the guest is restarted.
Description: The drive_init function in QEMU 0.9.1 determines the format of a raw disk image based on the header, which allows local guest users to read arbitrary files on the host by modifying the header to identify a different format, which is used when the guest is restarted.
Family: unix Class: vulnerability
Reference(s): CVE-2008-2004
Version: 5
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22720
 
Oval ID: oval:org.mitre.oval:def:22720
Title: ELSA-2008:0194: xen security and bug fix update (Important)
Description: The drive_init function in QEMU 0.9.1 determines the format of a raw disk image based on the header, which allows local guest users to read arbitrary files on the host by modifying the header to identify a different format, which is used when the guest is restarted.
Family: unix Class: patch
Reference(s): ELSA-2008:0194-01
CVE-2007-3919
CVE-2007-5730
CVE-2008-0928
CVE-2008-1943
CVE-2008-1944
CVE-2008-2004
Version: 29
Platform(s): Oracle Linux 5
Product(s): xen
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application1
Application29
Application5
Application2

OpenVAS Exploits

DateDescription
2009-10-13Name : Mandrake Security Advisory MDVSA-2009:257 (qemu)
File : nvt/mdksa_2009_257.nasl
2009-06-05Name : Ubuntu USN-771-1 (libmodplug)
File : nvt/ubuntu_771_1.nasl
2009-06-05Name : Ubuntu USN-772-1 (mpfr)
File : nvt/ubuntu_772_1.nasl
2009-06-05Name : Ubuntu USN-773-1 (pango1.0)
File : nvt/ubuntu_773_1.nasl
2009-06-05Name : Ubuntu USN-774-1 (moin)
File : nvt/ubuntu_774_1.nasl
2009-06-05Name : Ubuntu USN-776-2 (kvm)
File : nvt/ubuntu_776_2.nasl
2009-05-20Name : Debian Security Advisory DSA 1799-1 (qemu)
File : nvt/deb_1799_1.nasl
2009-05-20Name : Ubuntu USN-776-1 (kvm)
File : nvt/ubuntu_776_1.nasl
2009-04-09Name : Mandriva Update for xen MDKSA-2007:203 (xen)
File : nvt/gb_mandriva_MDKSA_2007_203.nasl
2009-04-09Name : Mandriva Update for qemu MDVSA-2008:162 (qemu)
File : nvt/gb_mandriva_MDVSA_2008_162.nasl
2009-04-06Name : SuSE Security Summary SUSE-SR:2009:008
File : nvt/suse_sr_2009_008.nasl
2009-03-06Name : RedHat Update for xen RHSA-2008:0194-01
File : nvt/gb_RHSA-2008_0194-01_xen.nasl
2009-02-27Name : Fedora Update for xen FEDORA-2007-2708
File : nvt/gb_fedora_2007_2708_xen_fc7.nasl
2009-02-27Name : Fedora Update for xen FEDORA-2007-737
File : nvt/gb_fedora_2007_737_xen_fc6.nasl
2009-02-16Name : Fedora Update for kvm FEDORA-2008-1973
File : nvt/gb_fedora_2008_1973_kvm_fc7.nasl
2009-02-16Name : Fedora Update for kvm FEDORA-2008-1993
File : nvt/gb_fedora_2008_1993_kvm_fc8.nasl
2009-02-16Name : Fedora Update for qemu FEDORA-2008-1995
File : nvt/gb_fedora_2008_1995_qemu_fc8.nasl
2009-02-16Name : Fedora Update for qemu FEDORA-2008-2001
File : nvt/gb_fedora_2008_2001_qemu_fc7.nasl
2009-02-16Name : Fedora Update for xen FEDORA-2008-2057
File : nvt/gb_fedora_2008_2057_xen_fc8.nasl
2009-02-16Name : Fedora Update for xen FEDORA-2008-2083
File : nvt/gb_fedora_2008_2083_xen_fc7.nasl
2009-01-20Name : Mandrake Security Advisory MDVSA-2009:016 (xen)
File : nvt/mdksa_2009_016.nasl
2008-09-04Name : FreeBSD Ports: qemu, qemu-devel
File : nvt/freebsd_qemu1.nasl
2008-09-04Name : FreeBSD Ports: qemu, qemu-devel
File : nvt/freebsd_qemu2.nasl
2008-01-17Name : Debian Security Advisory DSA 1395-1 (xen-utils)
File : nvt/deb_1395_1.nasl

Open Source Vulnerability Database (OSVDB)

idDescription
45412Xen Para Virtualized Frame Buffer (PVFB) Message Backend Framebuffer Screen U...
45411Xen Para Virtualized Frame Buffer (PVFB) Shared Framebuffer Crafted Descripti...
44918QEMU vl.c drive_init() Function Crafted Disk Image Header Arbitrary Local Fil...
42985QEMU net socket listen Option Local Overflow
42983QEMU Block Device Read/Write Request Arbitrary Memory Access
41343Xen xenmon.py /tmp/xenq-shm Symlink Arbitrary File Truncation
41342Xen xenbaked /tmp/xenq-shm Symlink Arbitrary File Truncation

Nessus® Vulnerability Scanner

DateDescription
2014-11-26Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2008-2003.nasl - Type : ACT_GATHER_INFO
2014-11-26Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2008-2007.nasl - Type : ACT_GATHER_INFO
2013-07-12Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2008-0194.nasl - Type : ACT_GATHER_INFO
2012-08-01Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20080513_xen_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2010-01-06Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2008-0194.nasl - Type : ACT_GATHER_INFO
2009-10-07Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2009-257.nasl - Type : ACT_GATHER_INFO
2009-07-21Name : The remote openSUSE host is missing a security update.
File : suse_11_1_qemu-090325.nasl - Type : ACT_GATHER_INFO
2009-07-21Name : The remote openSUSE host is missing a security update.
File : suse_11_0_qemu-090325.nasl - Type : ACT_GATHER_INFO
2009-05-14Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-776-2.nasl - Type : ACT_GATHER_INFO
2009-05-13Name : The remote Debian host is missing a security-related update.
File : debian_DSA-1799.nasl - Type : ACT_GATHER_INFO
2009-05-13Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-776-1.nasl - Type : ACT_GATHER_INFO
2009-04-23Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2008-162.nasl - Type : ACT_GATHER_INFO
2009-04-03Name : The remote openSUSE host is missing a security update.
File : suse_qemu-6123.nasl - Type : ACT_GATHER_INFO
2008-06-12Name : The remote openSUSE host is missing a security update.
File : suse_qemu-5270.nasl - Type : ACT_GATHER_INFO
2008-05-16Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2008-0194.nasl - Type : ACT_GATHER_INFO
2008-05-09Name : The remote FreeBSD host is missing one or more security-related updates.
File : freebsd_pkg_8950ac621d3011dd93880211060005df.nasl - Type : ACT_GATHER_INFO
2008-03-13Name : The remote FreeBSD host is missing one or more security-related updates.
File : freebsd_pkg_9cfbca7fefb711dcbe010211060005df.nasl - Type : ACT_GATHER_INFO
2008-02-29Name : The remote Fedora host is missing a security update.
File : fedora_2008-2057.nasl - Type : ACT_GATHER_INFO
2008-02-29Name : The remote Fedora host is missing a security update.
File : fedora_2008-2083.nasl - Type : ACT_GATHER_INFO
2008-02-26Name : The remote Fedora host is missing a security update.
File : fedora_2008-1973.nasl - Type : ACT_GATHER_INFO
2008-02-26Name : The remote Fedora host is missing a security update.
File : fedora_2008-1993.nasl - Type : ACT_GATHER_INFO
2008-02-26Name : The remote Fedora host is missing a security update.
File : fedora_2008-1995.nasl - Type : ACT_GATHER_INFO
2008-02-26Name : The remote Fedora host is missing a security update.
File : fedora_2008-2001.nasl - Type : ACT_GATHER_INFO
2007-11-14Name : The remote openSUSE host is missing a security update.
File : suse_xen-4616.nasl - Type : ACT_GATHER_INFO
2007-11-06Name : The remote Fedora host is missing a security update.
File : fedora_2007-2708.nasl - Type : ACT_GATHER_INFO
2007-11-06Name : The remote Fedora Core host is missing a security update.
File : fedora_2007-737.nasl - Type : ACT_GATHER_INFO
2007-11-02Name : The remote Mandrake Linux host is missing a security update.
File : mandrake_MDKSA-2007-203.nasl - Type : ACT_GATHER_INFO
2007-10-26Name : The remote Debian host is missing a security-related update.
File : debian_DSA-1395.nasl - Type : ACT_GATHER_INFO
2007-05-03Name : The remote Debian host is missing a security-related update.
File : debian_DSA-1284.nasl - Type : ACT_GATHER_INFO

Alert History

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DateInformations
2014-02-17 11:51:32
  • Multiple Updates