Fedora 33: 2020-306b84fd07 Critical: Xen Hypervisor DoS Threat

This package contains the XenD daemon and xm command line

tools, needed to manage virtual machines running under the

Xen hypervisor

x86 pv: Crash when handling guest access to MSR_MISC_ENABLE [XSA-333,

CVE-2020-25602] (#1881619) Missing unlock in XENMEM_acquire_resource error path

[XSA-334, CVE-2020-25598] (#1881616) race when migrating timers between x86 HVM

vCPU-s [XSA-336, CVE-2020-25604] (#1881618) PCI passthrough code reading back

hardware registers [XSA-337, CVE-2020-25595] (#1881587) once valid event

channels may not turn invalid [XSA-338, CVE-2020-25597] (#1881588) x86 pv guest

kernel DoS via SYSENTER [XSA-339, CVE-2020-25596] (#1881617) Missing memory

barriers when accessing/allocating an event channel [XSA-340, CVE-2020-25603]

(#1881583) out of bounds event channels available to 32-bit x86 domains

[XSA-342, CVE-2020-25600] (#1881582) races with evtchn_reset() [XSA-343,

CVE-2020-25599] (#1881581) lack of preemption in evtchn_reset() /

evtchn_destroy() [XSA-344, CVE-2020-25601] (#1881586)

* Tue Sep 22 2020 Michael Young - 4.14.0-5

- x86 pv: Crash when handling guest access to MSR_MISC_ENABLE [XSA-333,

CVE-2020-25602] (#1881619)

- Missing unlock in XENMEM_acquire_resource error path [XSA-334,

CVE-2020-25598] (#1881616)

- race when migrating timers between x86 HVM vCPU-s [XSA-336,

CVE-2020-25604] (#1881618)

- PCI passthrough code reading back hardware registers [XSA-337,

CVE-2020-25595] (#1881587)

- once valid event channels may not turn invalid [XSA-338, CVE-2020-25597]

(#1881588)

- x86 pv guest kernel DoS via SYSENTER [XSA-339, CVE-2020-25596]

(#1881617)

- Missing memory barriers when accessing/allocating an event channel [XSA-340,

CVE-2020-25603] (#1881583)

- out of bounds event channels available to 32-bit x86 domains [XSA-342,

CVE-2020-25600] (#1881582)

- races with evtchn_reset() [XSA-343, CVE-2020-25599] (#1881581)

- lack of preemption in evtchn_reset() / evtchn_destroy() [XSA-344,

CVE-2020-25601] (#1881586)

* Thu Sep 3 2020 Michael Young - 4.14.0-4

- rebuild for OCaml 4.11.1

[ 1 ] Bug #1877366 - CVE-2020-25603 xen: missing memory barriers when accessing/allocating an event channel (XSA-340)

https://bugzilla.redhat.com/show_bug.cgi?id=1877366

[ 2 ] Bug #1877369 - CVE-2020-25595 xen: PCI passthrough code reading back hardware registers (XSA-337)

https://bugzilla.redhat.com/show_bug.cgi?id=1877369

[ 3 ] Bug #1877378 - CVE-2020-25601 xen: lack of preemption in evtchn_reset() / evtchn_destroy() (XSA-344)

https://bugzilla.redhat.com/show_bug.cgi?id=1877378

[ 4 ] Bug #1877382 - CVE-2020-25604 xen: race when migrating timers between x86 HVM vCPU-s (XSA-336)

https://bugzilla.redhat.com/show_bug.cgi?id=1877382

[ 5 ] Bug #1877383 - CVE-2020-25598 xen: missing unlock in XENMEM_acquire_resource error path (XSA-334)

https://bugzilla.redhat.com/show_bug.cgi?id=1877383

[ 6 ] Bug #1879553 - CVE-2020-25597 xen: once valid event channels may not turn invalid (XSA-338)

https://bugzilla.redhat.com/show_bug.cgi?id=1879553

[ 7 ] Bug #1879567 - CVE-2020-25599 xen: races with evtchn_reset function (XSA-343)

https://bugzilla.redhat.com/show_bug.cgi?id=1879567

[ 8 ] Bug #1880137 - CVE-2020-25596 xen: x86 pv guest kernel DoS via SYSENTER (XSA-339)

https://bugzilla.redhat.com/show_bug.cgi?id=1880137

[ 9 ] Bug #1880156 - CVE-2020-25600 xen: out of bounds event channels available to 32-bit x86 domains (XSA-342)

https://bugzilla.redhat.com/show_bug.cgi?id=1880156

[ 10 ] Bug #1880158 - CVE-2020-25602 xen: x86 pv: Crash when handling guest access to MSR_MISC_ENABLE (XSA-333)

https://bugzilla.redhat.com/show_bug.cgi?id=1880158

su -c 'dnf upgrade --advisory FEDORA-2020-306b84fd07' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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/security/

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