Operating System:

[Debian]

Published:

03 November 2015

Protect yourself against future threats.

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.2737
                            xen security update
                              3 November 2015

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

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

Product:           xen
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
                   Debian GNU/Linux 7
Impact/Access:     Root Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-7835  

Reference:         ESB-2015.2723

Original Bulletin: 
   http://www.debian.org/security/2015/dsa-3390

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Debian Security Advisory DSA-3390-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
November 02, 2015                     https://www.debian.org/security/faq
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Package        : xen
CVE ID         : CVE-2015-7835

It was discovered that the code to validate level 2 page table entries
is bypassed when certain conditions are satisfied. A malicious PV guest
administrator can take advantage of this flaw to gain privileges via a
crafted superpage mapping.

For the oldstable distribution (wheezy), this problem has been fixed
in version 4.1.4-3+deb7u9.

For the stable distribution (jessie), this problem has been fixed in
version 4.4.1-9+deb8u2.

We recommend that you upgrade your xen packages.

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

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