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

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://xenproject.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: * TueSep 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 validevent 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 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/ --------------------------------------------------------------------------------_______________________________________________ package-announce mailing list -- This email address is being protected from spambots. You need JavaScript enabled to view it. To unsubscribe send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/This email address is being protected from spambots. You need JavaScript enabled to view it./ . The Fedora 34 upgrade addresses several SEVERE failures and possible DoS exploits within the xen hypervisor operations.. Fedora 33 Update,Xen Hypervisor Bug,Critical Security Fix,XSA-333 Crash. . Severity: Critical.LinuxSecurity.com Team

Calendar 2 Sep 26, 2020 •Critical Fedora
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