Fedora 20 : xen-4.3.2-1.fc20 (2014-2802)

update to xen-4.3.2 includes fix for 'Excessive time to disable caching with HVM guests with PCI passthrough', use-after-free in xccpupoolgetinfo under memory pressure Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory...

Fedora 19 : xen-4.2.3-14.fc19 (2014-1559)

PHYSDEVOPprepare,releasemsix exposed to unprivileged pv guests, Out-of-memory condition yielding memory corruption during IRQ setup Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically...

Fedora 20 : xen-4.3.1-8.fc20 (2014-1552)

PHYSDEVOPprepare,releasemsix exposed to unprivileged pv guests, Out-of-memory condition yielding memory corruption during IRQ setup Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically...

USN-2093-1: libvirt vulnerabilities

Martin Kletzander discovered that libvirt incorrectly handled reading memory tunables from LXC guests. A local user could possibly use this flaw to cause libvirtd to crash, resulting in a denial of service. This issue only affected Ubuntu 13.10. CVE-2013-6436 Dario Faggioli discovered that libvir...

CVE-2014-1666

The dophysdevop function in Xen 4.1.5, 4.1.6.1, 4.2.2 through 4.2.3, and 4.3.x does not properly restrict access to the 1 PHYSDEVOPpreparemsix and 2 PHYSDEVOPreleasemsix operations, which allows local PV guests to cause a denial of service host or guest malfunction or possibly gain privileges via...

CVE-2014-1666

The dophysdevop function in Xen 4.1.5, 4.1.6.1, 4.2.2 through 4.2.3, and 4.3.x does not properly restrict access to the 1 PHYSDEVOPpreparemsix and 2 PHYSDEVOPreleasemsix operations, which allows local PV guests to cause a denial of service host or guest malfunction or possibly gain privileges via...

CVE-2014-1666

The dophysdevop function in Xen 4.1.5, 4.1.6.1, 4.2.2 through 4.2.3, and 4.3.x does not properly restrict access to the 1 PHYSDEVOPpreparemsix and 2 PHYSDEVOPreleasemsix operations, which allows local PV guests to cause a denial of service host or guest malfunction or possibly gain privileges via...

Design/Logic Flaw

The qdisk PV disk backend in qemu-xen in Xen 4.2.x and 4.3.x before 4.3.1, and qemu 1.1 and other versions, allows local HVM guests to cause a denial of service domain grant reference consumption via unspecified vectors...

CVE-2013-4375

The qdisk PV disk backend in qemu-xen in Xen 4.2.x and 4.3.x before 4.3.1, and qemu 1.1 and other versions, allows local HVM guests to cause a denial of service domain grant reference consumption via unspecified vectors...

CVE-2013-4375

The qdisk PV disk backend in qemu-xen in Xen 4.2.x and 4.3.x before 4.3.1, and qemu 1.1 and other versions, allows local HVM guests to cause a denial of service domain grant reference consumption via unspecified vectors...

CVE-2013-6436

The lxcDomainGetMemoryParameters method in lxc/lxcdriver.c in libvirt 1.0.5 through 1.2.0 does not properly check the status of LXC guests when reading memory tunables, which allows local users to cause a denial of service NULL pointer dereference and libvirtd crash via a guest in the shutdown...

CVE-2011-1166

Xen, possibly before 4.0.2, allows local 64-bit PV guests to cause a denial of service host crash by specifying user mode execution without user-mode pagetables...

Code injection

Xen, possibly before 4.0.2, allows local 64-bit PV guests to cause a denial of service host crash by specifying user mode execution without user-mode pagetables...

CVE-2011-1166

Xen, possibly before 4.0.2, allows local 64-bit PV guests to cause a denial of service host crash by specifying user mode execution without user-mode pagetables...

CVE-2011-1166

CVE-2011-1166 affects Xen (likely prior to 4.0.2) where local 64-bit PV guests can cause a host crash/DoS by executing in user mode without user-mode pagetables. The issue is discussed in OSV and Debian- CVE-2011-1166 descriptions. Root cause details beyond the provided text are not specified. No...

CVE-2011-1166

Xen, possibly before 4.0.2, allows local 64-bit PV guests to cause a denial of service host crash by specifying user mode execution without user-mode pagetables...

Fedora 19 : xen-4.2.3-10.fc19 (2013-22325)

Lock order reversal between pagealloclock and mmrwlock, Hypercalls exposed to privilege rings 1 and 2 of HVM guests, Insufficient TLB flushing in VT-d iommu code Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable ha...

Kernel: Xen: Xsa-63: information leak via I/O instruction emulation

Xen 4.3.x and earlier does not properly handle certain errors, which allows local HVM guests to obtain hypervisor stack memory via a 1 port or 2 memory mapped I/O write or 3 other unspecified operations related to addresses without associated memory...

Guest triggerable AMD CPU erratum may cause host hang

ISSUE DESCRIPTION AMD CPU erratum 793 "Specific Combination of Writes to Write Combined Memory Types and Locked Instructions May Cause Core Hang" describes a situation under which a CPU core may hang. IMPACT A malicious guest administrator can mount a denial of service attack affecting the whole...

Hypercalls exposed to privilege rings 1 and 2 of HVM guests

ISSUE DESCRIPTION The privilege check applied to hypercall attempts by a HVM guest only refused access from ring 3; rings 1 and 2 were allowed through. IMPACT Code running in the intermediate privilege rings of HVM guest OSes may be able to elevate its privileges inside the guest by careful...