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Fedora Update Notification
FEDORA-2019-865bb16900
2019-11-17 01:42:46.113707
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Name : xen
Product : Fedora 29
Version : 4.11.2
Release : 2.fc29
URL : http://xen.org/
Summary : Xen is a virtual machine monitor
Description :
This package contains the XenD daemon and xm command line
tools, needed to manage virtual machines running under the
Xen hypervisor

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Update Information:

VCPUOP_initialise DoS [XSA-296, CVE-2019-18420] missing descriptor table limit
checking in x86 PV emulation [XSA-298, CVE-2019-18425] Issues with restartable
PV type change operations [XSA-299, CVE-2019-18421] (#1767726) add-to-physmap
can be abused to DoS Arm hosts [XSA-301, CVE-2019-18423] passed through PCI
devices may corrupt host memory after deassignment [XSA-302, CVE-2019-18424]
(#1767731) ARM: Interrupts are unconditionally unmasked in exception handlers
[XSA-303, CVE-2019-18422]
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ChangeLog:

* Fri Nov 1 2019 Michael Young <m.a.young@durham.ac.uk> – 4.11.2-2
– VCPUOP_initialise DoS [XSA-296, CVE-2019-18420]
– missing descriptor table limit checking in x86 PV emulation [XSA-298,
CVE-2019-18425]
– Issues with restartable PV type change operations [XSA-299, CVE-2019-18421]
(#1767726)
– add-to-physmap can be abused to DoS Arm hosts [XSA-301, CVE-2019-18423]
– passed through PCI devices may corrupt host memory after deassignment
[XSA-302, CVE-2019-18424] (#1767731)
– ARM: Interrupts are unconditionally unmasked in exception handlers
[XSA-303, CVE-2019-18422]
* Mon Jul 1 2019 Michael Young <m.a.young@durham.ac.uk> – 4.11.2-1
– update to 4.11.2
remove patches now fixed upstream
adjust xen.use.fedora.ipxe.patch
drop parts of xen.gcc9.fixes.patch
* Sat Jun 15 2019 Michael Young <m.a.young@durham.ac.uk> – 4.11.1-6
– Unlimited Arm Atomics Operations [XSA-295] (#1720760)
* Tue May 14 2019 Michael Young <m.a.young@durham.ac.uk> – 4.11.1-5
– Microarchitectural Data Sampling speculative side channel [XSA-297,
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091]
– additional patches so above applies cleanly
– work around grub2 issues in dom0
* Tue Mar 5 2019 Michael Young <m.a.young@durham.ac.uk> – 4.11.1-4
– xen: various flaws (#1685577)
grant table transfer issues on large hosts [XSA-284]
race with pass-through device hotplug [XSA-285]
x86: steal_page violates page_struct access discipline [XSA-287]
x86: Inconsistent PV IOMMU discipline [XSA-288]
missing preemption in x86 PV page table unvalidation [XSA-290]
x86/PV: page type reference counting issue with failed IOMMU update [XSA-291]
x86: insufficient TLB flushing when using PCID [XSA-292]
x86: PV kernel context switch corruption [XSA-293]
x86 shadow: Insufficient TLB flushing when using PCID [XSA-294]
* Thu Feb 14 2019 Michael Young <m.a.young@durham.ac.uk> – 4.11.1-3
– add gcc9 build fixes (#1676229)
* Sun Feb 3 2019 Fedora Release Engineering <releng@fedoraproject.org> – 4.11.1-2
– Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild
* Tue Dec 11 2018 Michael Young <m.a.young@durham.ac.uk> – 4.11.1-1
– update to 4.11.1
remove patches for issues now fixed upstream
adjust xen.use.fedora.ipxe.patch
– only include qemutrad build requirements for platforms that use it
– construct ovmf.bin from edk2-ovmf package (#1656651)
* Tue Nov 20 2018 Michael Young <m.a.young@durham.ac.uk> – 4.11.0-10
– insufficient TLB flushing / improper large page mappings with AMD IOMMUs
[XSA-275, CVE-2018-19961, CVE-2018-19962] (#1651665)
– x86: DoS from attempting to use INVPCID with a non-canonical addresses
[XSA-279, CVE-2018-19965] (#1651970)
– xen: various flaws (#1652251)
resource accounting issues in x86 IOREQ server handling
[XSA-276, CVE-2018-19963]
x86: incorrect error handling for guest p2m page removals
[XSA-277, CVE-2018-19964]
Fix for XSA-240 conflicts with shadow paging [XSA-280, CVE-2018-19966]
* Tue Nov 6 2018 Michael Young <m.a.young@durham.ac.uk> – 4.11.0-9
– guest use of HLE constructs may lock up host [XSA-282, CVE-2018-19967]
* Wed Oct 24 2018 Michael Young <m.a.young@durham.ac.uk> – 4.11.0-8
– x86: Nested VT-x usable even when disabled [XSA-278, CVE-2018-18883]
(#1643118)
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References:

[ 1 ] Bug #1765043 – CVE-2019-18421 xen: a malicious PV guest administrator may be able to escalate their privilege to that of the host
https://bugzilla.redhat.com/show_bug.cgi?id=1765043
[ 2 ] Bug #1767730 – CVE-2019-18424 xen: passed through PCI devices may corrupt host memory after deassignment leading to privilege escalation
https://bugzilla.redhat.com/show_bug.cgi?id=1767730
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This update can be installed with the “dnf” update program. Use
su -c ‘dnf upgrade –advisory FEDORA-2019-865bb16900’ at the command
line. For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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