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Debian Security Advisory DSA-3140-1                   security@debian.org
http://www.debian.org/security/                        Moritz Muehlenhoff
January 27, 2015                       http://www.debian.org/security/faq
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Package        : xen
CVE ID         : CVE-2014-8594 CVE-2014-8595 CVE-2014-8866 CVE-2014-8867 
                 CVE-2014-9030

Multiple security issues have been discovered in the Xen virtualisation
solution which may result in denial of service, information disclosure
or privilege escalation.

CVE-2014-8594

    Roger Pau Monne and Jan Beulich discovered that incomplete
    restrictions on MMU update hypercalls may result in privilege
    escalation.

CVE-2014-8595

    Jan Beulich discovered that missing privilege level checks in the
    x86 emulation of far branches may result in privilege escalation.

CVE-2014-8866

    Jan Beulich discovered that an error in compatibility mode hypercall
    argument translation may result in denial of service.

CVE-2014-8867

    Jan Beulich discovered that an insufficient restriction in
    acceleration support for the "REP MOVS" instruction may result in
    denial of service.

CVE-2014-9030

    Andrew Cooper discovered a page reference leak in MMU_MACHPHYS_UPDATE
    handling, resulting in denial of service.

For the stable distribution (wheezy), these problems have been fixed in
version 4.1.4-3+deb7u4.

For the upcoming stable distribution (jessie), these problems have been
fixed in version 4.4.1-4.

For the unstable distribution (sid), these problems have been fixed in
version 4.4.1-4.

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