exploit the possibilities

Red Hat Security Advisory 2012-1236-01

Red Hat Security Advisory 2012-1236-01
Posted Sep 5, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-1236-01 - The xen packages contain administration tools and the xend service for managing the kernel-xen kernel for virtualization on Red Hat Enterprise Linux. A flaw was found in the way QEMU handled VT100 terminal escape sequences when emulating certain character devices. A guest user with privileges to write to a character device that is emulated on the host using a virtual console back-end could use this flaw to crash the qemu process on the host or, possibly, escalate their privileges on the host. This flaw did not affect the default use of the Xen hypervisor implementation in Red Hat Enterprise Linux 5. This problem only affected fully-virtualized guests that have a serial or parallel device that uses a virtual console back-end. By default, the virtual console back-end is not used for such devices; only guests explicitly configured to use them in this way were affected.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2012-3515
MD5 | 06e05aaec11e8b26715d93a248496102

Red Hat Security Advisory 2012-1236-01

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
Red Hat Security Advisory

Synopsis: Important: xen security update
Advisory ID: RHSA-2012:1236-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-1236.html
Issue date: 2012-09-05
CVE Names: CVE-2012-3515
=====================================================================

1. Summary:

Updated xen packages that fix one security issue are now available for
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from the
CVE link in the References section.

2. Relevant releases/architectures:

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

3. Description:

The xen packages contain administration tools and the xend service for
managing the kernel-xen kernel for virtualization on Red Hat Enterprise
Linux.

A flaw was found in the way QEMU handled VT100 terminal escape sequences
when emulating certain character devices. A guest user with privileges to
write to a character device that is emulated on the host using a virtual
console back-end could use this flaw to crash the qemu process on the
host or, possibly, escalate their privileges on the host. (CVE-2012-3515)

This flaw did not affect the default use of the Xen hypervisor
implementation in Red Hat Enterprise Linux 5. This problem only affected
fully-virtualized guests that have a serial or parallel device that uses a
virtual console (vc) back-end. By default, the virtual console back-end is
not used for such devices; only guests explicitly configured to use them
in this way were affected.

Red Hat would like to thank the Xen project for reporting this issue.

All users of xen are advised to upgrade to these updated packages, which
correct this issue. After installing the updated packages, all
fully-virtualized guests must be restarted for this update to take effect.

4. Solution:

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

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

851252 - CVE-2012-3515 qemu: VT100 emulation vulnerability

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xen-3.0.3-135.el5_8.5.src.rpm

i386:
xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm
xen-libs-3.0.3-135.el5_8.5.i386.rpm

x86_64:
xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm
xen-debuginfo-3.0.3-135.el5_8.5.x86_64.rpm
xen-libs-3.0.3-135.el5_8.5.i386.rpm
xen-libs-3.0.3-135.el5_8.5.x86_64.rpm

RHEL Desktop Multi OS (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xen-3.0.3-135.el5_8.5.src.rpm

i386:
xen-3.0.3-135.el5_8.5.i386.rpm
xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm
xen-devel-3.0.3-135.el5_8.5.i386.rpm

x86_64:
xen-3.0.3-135.el5_8.5.x86_64.rpm
xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm
xen-debuginfo-3.0.3-135.el5_8.5.x86_64.rpm
xen-devel-3.0.3-135.el5_8.5.i386.rpm
xen-devel-3.0.3-135.el5_8.5.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-135.el5_8.5.src.rpm

i386:
xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm
xen-libs-3.0.3-135.el5_8.5.i386.rpm

ia64:
xen-debuginfo-3.0.3-135.el5_8.5.ia64.rpm
xen-libs-3.0.3-135.el5_8.5.ia64.rpm

x86_64:
xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm
xen-debuginfo-3.0.3-135.el5_8.5.x86_64.rpm
xen-libs-3.0.3-135.el5_8.5.i386.rpm
xen-libs-3.0.3-135.el5_8.5.x86_64.rpm

RHEL Virtualization (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-135.el5_8.5.src.rpm

i386:
xen-3.0.3-135.el5_8.5.i386.rpm
xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm
xen-devel-3.0.3-135.el5_8.5.i386.rpm

ia64:
xen-3.0.3-135.el5_8.5.ia64.rpm
xen-debuginfo-3.0.3-135.el5_8.5.ia64.rpm
xen-devel-3.0.3-135.el5_8.5.ia64.rpm

x86_64:
xen-3.0.3-135.el5_8.5.x86_64.rpm
xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm
xen-debuginfo-3.0.3-135.el5_8.5.x86_64.rpm
xen-devel-3.0.3-135.el5_8.5.i386.rpm
xen-devel-3.0.3-135.el5_8.5.x86_64.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://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2012-3515.html
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2012 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)

iD8DBQFQR4bxXlSAg2UNWIIRArHnAJ40hJ85kcaujeunn+Roj+BwjUikJwCgpkyl
JvqfaaqHDVoBwoVvwe2RY3g=
=vXCr
-----END PGP SIGNATURE-----


--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://www.redhat.com/mailman/listinfo/rhsa-announce

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

May 2019

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    May 1st
    16 Files
  • 2
    May 2nd
    8 Files
  • 3
    May 3rd
    8 Files
  • 4
    May 4th
    2 Files
  • 5
    May 5th
    1 Files
  • 6
    May 6th
    15 Files
  • 7
    May 7th
    22 Files
  • 8
    May 8th
    16 Files
  • 9
    May 9th
    17 Files
  • 10
    May 10th
    16 Files
  • 11
    May 11th
    3 Files
  • 12
    May 12th
    4 Files
  • 13
    May 13th
    25 Files
  • 14
    May 14th
    24 Files
  • 15
    May 15th
    78 Files
  • 16
    May 16th
    16 Files
  • 17
    May 17th
    16 Files
  • 18
    May 18th
    2 Files
  • 19
    May 19th
    1 Files
  • 20
    May 20th
    11 Files
  • 21
    May 21st
    21 Files
  • 22
    May 22nd
    20 Files
  • 23
    May 23rd
    36 Files
  • 24
    May 24th
    2 Files
  • 25
    May 25th
    0 Files
  • 26
    May 26th
    0 Files
  • 27
    May 27th
    0 Files
  • 28
    May 28th
    0 Files
  • 29
    May 29th
    0 Files
  • 30
    May 30th
    0 Files
  • 31
    May 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2019 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close