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Fedora 21: 2015-5208 Security Advisory: Critical Xen Issues Identified

fedora
Calendar Grey April 11, 2015
Dist Fedora Esm H88
The latest Xen security patch for Fedora 21 resolves several vulnerabilities, boosting overall system performance and refining hypervisor control.
Long latency MMIO mapping operations are not preemptible [XSA-125, CVE-2015-2752] Unmediated PCI command register access in qemu [XSA-126, CVE-2015-2756] Certain domctl operations ...

Summary

This package contains the XenD daemon and xm command line

tools, needed to manage virtual machines running under the

Xen hypervisor

Update Information:

Long latency MMIO mapping operations are not preemptible [XSA-125, CVE-2015-2752] Unmediated PCI command register access in qemu [XSA-126, CVE-2015-2756] Certain domctl operations may be abused to lock up the host [XSA-127, CVE-2015-2751] update to xen-4.4.2

Change Log

* Tue Mar 31 2015 Michael Young - 4.4.2-2 - Long latency MMIO mapping operations are not preemptible [XSA-125, CVE-2015-2752] (#1207741) - Unmediated PCI command register access in qemu [XSA-126, CVE-2015-2756] (#1307738) - Certain domctl operations may be abused to lock up the host [XSA-127, CVE-2015-2751] (#1207739) * Mon Mar 23 2015 Michael Young - 4.4.2-1 - update to xen-4.4.2 remove patches for fixes that are now included * Fri Mar 13 2015 Michael Young - 4.4.1-16 - Additional patch for XSA-98 on arm64 * Thu Mar 12 2015 Michael Young - 4.4.1-15 - HVM qemu unexpectedly enabling emulated VGA graphics backends [XSA-119, CVE-2015-2152] (#1201365) * Wed Mar 11 2015 Michael Young - 4.4.1-14 - Hypervisor memory corruption due to x86 emulator flaw [XSA-123, CVE-2015-2151] (#1200398) * Thu Mar 5 2015 Michael Young - 4.4.1-13 - enable building pngs from fig files which is working again - fix oxenstored.service preset preuninstall script - arm: vgic: incorrect rate limiting of guest triggered logging [XSA-118, CVE-2015-1563] (#1187153) - Information leak via internal x86 system device emulation [XSA-121, CVE-2015-2044] - Information leak through version information hypercall [XSA-122, CVE-2015-2045] * Tue Jan 6 2015 Michael Young - 4.4.1-12 - xen crash due to use after free on hvm guest teardown [XSA-116, CVE-2015-0361] (#1179221) * Tue Dec 16 2014 Michael Young - 4.4.1-11 - fix xendomains issue introduced by xl migrate --debug patch * Mon Dec 8 2014 Michael Young - 4.4.1-10 - p2m lock starvation [XSA-114, CVE-2014-9065] - fix build with --without xsm * Thu Nov 27 2014 Michael Young - 4.4.1-9 - Excessive checking in compatibility mode hypercall argument translation [XSA-111, CVE-2014-8866] - Insufficient bounding of "REP MOVS" to MMIO emulated inside the hypervisor [XSA-112, CVE-2014-8867] - fix segfaults and failures in xl migrate --debug (#1166461) * Thu Nov 20 2014 Michael Young - 4.4.1-8 - Guest effectable page reference leak in MMU_MACHPHYS_UPDATE handling [XSA-113, CVE-2014-9030] (#1166914) * Tue Nov 18 2014 Michael Young - 4.4.1-7 - Insufficient restrictions on certain MMU update hypercalls [XSA-109, CVE-2014-8594] (#1165205) - Missing privilege level checks in x86 emulation of far branches [XSA-110, CVE-2014-8595] (#1165204) - Add fix for CVE-2014-0150 to qemu-dm, though it probably isn't exploitable from xen (#1086776)

References


[ 1 ] Bug #1203732 - CVE-2015-2752 xen: long latency MMIO mapping operations are not preemptible (xsa125) https://bugzilla.redhat.com/show_bug.cgi?id=1203732 [ 2 ] Bug #1203737 - CVE-2015-2756 xen: unmediated PCI command register access in qemu (xsa126) https://bugzilla.redhat.com/show_bug.cgi?id=1203737 [ 3 ] Bug #1203745 - CVE-2015-2751 xen: certain domctl operations may be abused to lock up the host https://bugzilla.redhat.com/show_bug.cgi?id=1203745

Update Instructions

This update can be installed with the "yum" update program. Use su -c 'yum update xen' at the command line. For more information, refer to "Managing Software with yum", available at .

Severity
critical
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Name: xen
Product: Fedora 21
Version: 4.4.2
Release: 2.fc21
Summary: Xen is a virtual machine monitor

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