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Fedora Update Notification
FEDORA-2018-7cd077ddd3
2018-05-27 19:18:48.299855
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Name : xen
Product : Fedora 26
Version : 4.8.3
Release : 5.fc26
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:

x86: mishandling of debug exceptions [XSA-260, CVE-2018-8897] x86 vHPET
interrupt injection errors [XSA-261, CVE-2018-10982] (#1576089) qemu may drive
Xen into unbounded loop [XSA-262, CVE-2018-10981] (#1576680)
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ChangeLog:

* Wed May 9 2018 Michael Young <m.a.young@durham.ac.uk> – 4.8.3-5
– x86: mishandling of debug exceptions [XSA-260, CVE-2018-8897]
(with extra patches 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> – 4.8.3-4
– Information leak via crafted user-supplied CDROM [XSA-258] (#1571867)
– x86: PV guest may crash Xen with XPTI [XSA-259] (#1571878)
* Tue Feb 27 2018 Michael Young <m.a.young@durham.ac.uk> – 4.8.3-3
– update Xen page-table isolation (XPTI) mitigation
and add 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)
* Thu Jan 25 2018 Michael Young <m.a.young@durham.ac.uk> – 4.8.3-2
– also need CONFIG_PV_LINEAR_PT in xen.hypervisor.config to build
* Wed Jan 24 2018 Michael Young <m.a.young@durham.ac.uk> – 4.8.3-1
– update to xen-4.8.3
(includes Xen page-table isolation (XPTI) mitigation for XSA-254)
adjust xen.use.fedora.ipxe.patch, xen.gcc7.fix.patch
and qemu.git-fec5e8c92becad223df9d972770522f64aafdb72.patch
remove upstream patches
* Tue Dec 12 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.2-9
– 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]
broken x86 shadow mode refcount overflow check [XSA-249]
improper x86 shadow mode refcount error handling [XSA-250]
improper bug check in x86 log-dirty handling [XSA-251]
* Tue Nov 28 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.2-8
– 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]
* Sun Nov 19 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.2-7
– incomplete adaption of new XSA-240 patch to Fedora state
* Thu Nov 16 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.2-6
– 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> – 4.8.2-5
– 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> – 4.8.2-4
– 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]
* Tue Oct 3 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.2-3
– ARM: Some memory not scrubbed at boot [XSA-245, CVE-2017-17046] (#1499843)
– Qemu: vga: reachable assert failure during during display update
[CVE-2017-13673] (#1486591)
– Qemu: vga: OOB read access during display update [CVE-2017-13672] (#1486562)
* Tue Sep 12 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.2-2
– xen: various flaws (#1490884)
Missing NUMA node parameter verification [XSA-231, CVE-2017-14316]
Missing check for grant table [XSA-232, CVE-2017-14318]
cxenstored: Race in domain cleanup [XSA-233, CVE-2017-14317]
insufficient grant unmapping checks for x86 PV guests
[XSA-234, CVE-2017-14319]
* Wed Sep 6 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.2-1
– update to xen-4.8.2
adjust xen.use.fedora.ipxe.patch and xen.gcc7.fix.patch
remove upstream patches
* Wed Aug 30 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.1-8
– Qemu: usb: ohci: infinite loop due to incorrect return value [CVE-2017-9330]
(#1457698)
– Qemu: nbd: segmentation fault due to client non-negotiation [CVE-2017-9524]
(#1460173)
– Qemu: qemu-nbd: server breaks with SIGPIPE upon client abort [CVE-2017-10664]
(#1466466)
– Qemu: exec: oob access during dma operation [CVE-2017-11334] (#1471640)
– revised full fix for XSA-226 (regressed 32-bit Dom0 or backend domains)
* Wed Aug 23 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.1-7
– full fix for XSA-226, replacing workaround
– drop conflict of xendomain and libvirtd as can cause problems (#1398590)
– add-to-physmap error paths fail to release lock on ARM [XSA-235] (#1484476)
– Qemu: audio: host memory leakage via capture buffer [CVE-2017-8309]
(#1446521)
– Qemu: input: host memory leakage via keyboard events [CVE-2017-8379]
(#1446561)
* Tue Aug 15 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.1-6
– Qemu: serial: host memory leakage 16550A UART emulation [CVE-2017-5579]
(#1416162)
– Qemu: display: cirrus: OOB read access issue [CVE-2017-7718] (#1443444)
– xen: various flaws (#1481765)
multiple problems with transitive grants [XSA-226, CVE-2017-12135]
x86: PV privilege escalation via map_grant_ref [XSA-227, CVE-2017-12137]
grant_table: Race conditions with maptrack free list handling
[XSA-228, CVE-2017-12136]
grant_table: possibly premature clearing of GTF_writing / GTF_reading
[XSA-230, CVE-2017-12855]
* Tue Jun 20 2017 Michael Young <m.a.young@durham.ac.uk> – 4.8.1-4
– xen: various flaws (#1463247)
blkif responses leak backend stack data [XSA-216]
page transfer may allow PV guest to elevate privilege [XSA-217]
Races in the grant table unmap code [XSA-218]
x86: insufficient reference counts during shadow emulation [XSA-219]
x86: PKRU and BND* leakage between vCPU-s [XSA-220]
NULL pointer deref in event channel poll [XSA-221] (#1463231)
stale P2M mappings due to insufficient error checking [XSA-222]
ARM guest disabling interrupt may crash Xen [XSA-223]
grant table operations mishandle reference counts [XSA-224]
arm: vgic: Out-of-bound access when sending SGIs [XSA-225]
* Mon May 15 2017 Richard W.M. Jones <rjones@redhat.com> – 4.8.1-3
– Rebuild for OCaml 4.04.1.
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References:

[ 1 ] Bug #1571880 – CVE-2018-10982 xsa261 xen: x86 vHPET interrupt injection errors (XSA-261)
https://bugzilla.redhat.com/show_bug.cgi?id=1571880
[ 2 ] Bug #1571881 – CVE-2018-10981 xsa262 xen: qemu may drive Xen into unbounded loop (XSA-262)
https://bugzilla.redhat.com/show_bug.cgi?id=1571881
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This update can be installed with the “dnf” update program. Use
su -c ‘dnf upgrade –advisory FEDORA-2018-7cd077ddd3’ 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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