Operating System:

[Debian]

Published:

10 September 2012

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2012.0858
                      xen-qemu-dm-4.0 security update
                             10 September 2012

===========================================================================

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

Product:           xen-qemu-dm-4.0
Publisher:         Debian
Operating System:  Debian GNU/Linux 6
Impact/Access:     Increased Privileges   -- Existing Account
                   Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2012-4411 CVE-2012-3515 

Reference:         ESB-2012.0849
                   ESB-2012.0844
                   ESB-2012.0843
                   ESB-2012.0842

Original Bulletin: 
   http://www.debian.org/security/2012/dsa-2543

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Debian Security Advisory DSA-2543-1                   security@debian.org
http://www.debian.org/security/                          Raphael Geissert
September 08, 2012                     http://www.debian.org/security/faq
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Package        : xen-qemu-dm-4.0
Vulnerability  : multiple
Problem type   : local
Debian-specific: no
CVE ID         : CVE-2012-3515 CVE-2012-4411

Multiple vulnerabilities have been discovered in xen-qemu-dm-4.0, the Xen
Qemu Device Model virtual machine hardware emulator. The Common
Vulnerabilities and Exposures project identifies the following problems:

CVE-2012-3515:

    The device model for HVM domains does not properly handle VT100
    escape sequences when emulating certain devices with a virtual
    console backend. An attacker within a guest with access to the
    vulnerable virtual console could overwrite memory of the device
    model and escalate privileges to that of the device model process.

CVE-2012-4411:

    The qemu monitor was enabled by default, allowing administrators of
    a guest to access resources of the host, possibly escalate privileges
    or access resources belonging to another guest.

For the stable distribution (squeeze), these problems have been fixed in
version 4.0.1-2+squeeze2.

The testing distribution (wheezy), and the unstable distribution (sid),
no longer contain this package.

We recommend that you upgrade your xen-qemu-dm-4.0 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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===========================================================================
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