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Fedora 27: FEDORA-2018-1a467757ce Critical: Xen Security Issues

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. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2018-1a467757ce 2018-07-13 16:33:58.543271 --------------------------------------------------------------------------------Name : xen Product : Fedora 27 Version : 4.9.2 Release : 6.fc27 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: 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 --------------------------------------------------------------------------------ChangeLog: * Wed Jun 27 2018 Michael Young - 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 - 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 -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 - 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 - 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 - 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 - 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 - 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 - 4.9.1-3 - OCaml 4.06.0 rebuild. * Tue Nov 28 2017 Michael Young - 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 - 4.9.1-1 - update to 4.9.1 (#1515818) adjust xen.use.fedora.ipxe.patch andqemu.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 - 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 - 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 - 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] --------------------------------------------------------------------------------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 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisoryFEDORA-2018-1a467757ce' 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./message/4Q2DYZXIZH5NK6GZ24XMBJ24W6MHVDAW/ . Critical Fedora 27 update resolves significant xen security issues, enhancing virtualization safety and system integrity.. Fedora Security Update,Xen Threats,Virtual Machine Safety. . Severity: Critical. LinuxSecurity.com Team

Jul 13, 2018 •Critical Fedora