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-2014-8867Jan 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.

Xen is a hypervisor providing services that allow multiple computer operating systems to execute on the same computer hardware concurrently.

xen on Debian Linux

This check tests the installed software version using the apt package manager.

• http://www.debian.org/security/2015/dsa-3140.html

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Updated on 2015-03-25