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    Fedora 33: xen 2020-306b84fd07

    Date
    140
    Posted By
    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
    --------------------------------------------------------------------------------
    Fedora Update Notification
    FEDORA-2020-306b84fd07
    2020-09-27 00:15:19.880716
    --------------------------------------------------------------------------------
    
    Name        : xen
    Product     : Fedora 33
    Version     : 4.14.0
    Release     : 5.fc33
    URL         : https://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
    
    --------------------------------------------------------------------------------
    Update Information:
    
    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)
    --------------------------------------------------------------------------------
    ChangeLog:
    
    * 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
    --------------------------------------------------------------------------------
    References:
    
      [ 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
    --------------------------------------------------------------------------------
    
    This update can be installed with the "dnf" update program. Use
    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#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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