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Fedora Update Notification
FEDORA-2018-1a467757ce
2018-07-13 16:33:58.543271
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Name : xen
Product : Fedora 27
Version : 4.9.2
Release : 6.fc27
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:
preemption checks bypassed in x86 PV MM handling [XSA-264, CVE-2018-12891] x86:
#DB exception safety check can be triggered by a guest [XSA-265, CVE-2018-12893]
libxl fails to honour readonly flag on HVM emulated SCSI disks [XSA-266,
CVE-2018-12892] —- Speculative register leakage from lazy FPU context
switching [XSA-267, CVE-2018-3665] fix for change in iasl output
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ChangeLog:
* Wed Jun 27 2018 Michael Young <m.a.young@durham.ac.uk> – 4.9.2-6
– preemption checks bypassed in x86 PV MM handling [XSA-264, CVE-2018-12891]
– x86: #DB exception safety check can be triggered by a guest [XSA-265,
CVE-2018-12893]
– libxl fails to honour readonly flag on HVM emulated SCSI disks [XSA-266,
CVE-2018-12892]
* Sat Jun 16 2018 Michael Young <m.a.young@durham.ac.uk> – 4.9.2-5
– Speculative register leakage from lazy FPU context switching
[XSA-267, CVE-2018-3665]
– fix for change in iasl output
* Tue May 22 2018 Michael Young <m.a.young@durham.ac.uk> – 4.9.2-4
– Speculative Store Bypass [XSA-263, CVE-2018-3639]
(with extra patches so it applies cleanly)
* Wed May 9 2018 Michael Young <m.a.young@durham.ac.uk> – 4.9.2-3
– x86: mishandling of debug exceptions [XSA-260, CVE-2018-8897]
(with extra patch so it applies cleanly)
– x86 vHPET interrupt injection errors [XSA-261, CVE-2018-10982] (#1576089)
– qemu may drive Xen into unbounded loop [XSA-262, CVE-2018-10981] (#1576680)
* Wed Apr 25 2018 Michael Young <m.a.young@durham.ac.uk> – 4.9.2-2
– Information leak via crafted user-supplied CDROM [XSA-258] (#1571867)
– x86: PV guest may crash Xen with XPTI [XSA-259] (#1571878)
* Wed Apr 4 2018 Michael Young <m.a.young@durham.ac.uk> – 4.9.2-1
– update to 4.9.2
adjust xen.use.fedora.ipxe.patch
remove patches for issues now fixed upstream
* Tue Feb 27 2018 Michael Young <m.a.young@durham.ac.uk> – 4.9.1-5
– add Xen page-table isolation (XPTI) mitigation
and Branch Target Injection (BTI) mitigation for XSA-254
– DoS via non-preemptable L3/L4 pagetable freeing [XSA-252, CVE-2018-7540]
(#1549568)
– grant table v2 -> v1 transition may crash Xen [XSA-255, CVE-2018-7541]
(#1549570)
– x86 PVH guest without LAPIC may DoS the host [XSA-256, CVE-2018-7542]
(#1549572)
* Tue Dec 12 2017 Michael Young <m.a.young@durham.ac.uk> – 4.9.1-4
– another patch related to the [XSA-240, CVE-2017-15595] issue
– xen: various flaws (#1525018)
x86 PV guests may gain access to internally used page
[XSA-248, CVE-2017-17566]
broken x86 shadow mode refcount overflow check [XSA-249, CVE-2017-17563]
improper x86 shadow mode refcount error handling [XSA-250, CVE-2017-17564]
improper bug check in x86 log-dirty handling [XSA-251, CVE-2017-17565]
* Sat Dec 2 2017 Richard W.M. Jones <rjones@redhat.com> – 4.9.1-3
– OCaml 4.06.0 rebuild.
* Tue Nov 28 2017 Michael Young <m.a.young@durham.ac.uk> – 4.9.1-2
– xen: various flaws (#1518214)
x86: infinite loop due to missing PoD error checking [XSA-246, CVE-2017-17044]
Missing p2m error checking in PoD code [XSA-247, CVE-2017-17045]
* Thu Nov 23 2017 Michael Young <m.a.young@durham.ac.uk> – 4.9.1-1
– update to 4.9.1 (#1515818)
adjust xen.use.fedora.ipxe.patch
and qemu.git-fec5e8c92becad223df9d972770522f64aafdb72.patch
remove patches for issues now fixed upstream and parts of xen.gcc7.fix.patch
update xen.hypervisor.config
– update Source0 location
* Wed Nov 15 2017 Michael Young <m.a.young@durham.ac.uk> – 4.9.0-14
– fix an issue in patch for [XSA-240, CVE-2017-15595] that might be a
security issue
– fix for [XSA-243, CVE-2017-15592] could cause hypervisor crash (DOS)
* Thu Oct 26 2017 Michael Young <m.a.young@durham.ac.uk> – 4.9.0-13
– pin count / page reference race in grant table code [XSA-236, CVE-2017-15597]
(#1506693)
* Thu Oct 12 2017 Michael Young <m.a.young@durham.ac.uk> – 4.9.0-12
– xen: various flaws (#1501391)
multiple MSI mapping issues on x86 [XSA-237, CVE-2017-15590]
DMOP map/unmap missing argument checks [XSA-238, CVE-2017-15591]
hypervisor stack leak in x86 I/O intercept code [XSA-239, CVE-2017-15589]
Unlimited recursion in linear pagetable de-typing [XSA-240, CVE-2017-15595]
Stale TLB entry due to page type release race [XSA-241, CVE-2017-15588]
page type reference leak on x86 [XSA-242, CVE-2017-15593]
x86: Incorrect handling of self-linear shadow mappings with translated
guests [XSA-243, CVE-2017-15592]
x86: Incorrect handling of IST settings during CPU hotplug [XSA-244,
CVE-2017-15594]
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References:
[ 1 ] Bug #1590984 – CVE-2018-12892 xsa-266 xen: libxl fails to honour readonly flag on HVM emulated SCSI disks
https://bugzilla.redhat.com/show_bug.cgi?id=1590984
[ 2 ] Bug #1590979 – CVE-2018-12893 xen: x86 DB exception safety check can be triggered by a guest (XSA-265)
https://bugzilla.redhat.com/show_bug.cgi?id=1590979
[ 3 ] Bug #1590985 – CVE-2018-12891 xen: preemption checks bypassed in x86 PV MM handling (XSA-264)
https://bugzilla.redhat.com/show_bug.cgi?id=1590985
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This update can be installed with the “dnf” update program. Use
su -c ‘dnf upgrade –advisory FEDORA-2018-1a467757ce’ 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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