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Fedora 32: Critical DoS Vulnerabilities Found in Xen Hypervisor 2020

incorrect error handling in event channel port allocation leads to DoS [XSA-317, CVE-2020-15566] (#1854465) inverted code paths in x86 dirty VRAM tracking leads to DoS [XSA-319, CVE-2020-15563] (#1854463) xen: insufficient cache write-back under VT-d leads to DoS [XSA-321, CVE-2020-15565] (#1854467) missing alignment check in VCPUOP_register_vcpu_info leads to DoS [XSA-327, CVE-2020-15564]. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2020-fbc13516af 2020-07-16 01:13:06.320213 --------------------------------------------------------------------------------Name : xen Product : Fedora 32 Version : 4.13.1 Release : 4.fc32 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: incorrect error handling in event channel port allocation leads to DoS [XSA-317, CVE-2020-15566] (#1854465) inverted code paths in x86 dirty VRAM tracking leads to DoS [XSA-319, CVE-2020-15563] (#1854463) xen: insufficient cache write-back under VT-d leads to DoS [XSA-321, CVE-2020-15565] (#1854467) missing alignment check in VCPUOP_register_vcpu_info leads to DoS [XSA-327, CVE-2020-15564] (#1854458) non-atomic modification of live EPT PTE leads to DoS [XSA-328, CVE-2020-15567] (#1854464) --------------------------------------------------------------------------------ChangeLog: * Tue Jul 7 2020 Michael Young - 4.13.1-4 - incorrect error handling in event channel port allocation leads to DoS [XSA-317, CVE-2020-15566] (#1854465) - inverted code paths in x86 dirty VRAM tracking leads to DoS [XSA-319, CVE-2020-15563] (#1854463) - xen: insufficient cache write-back under VT-d leads to DoS [XSA-321, CVE-2020-15565] (#1854467) - missing alignmentcheck in VCPUOP_register_vcpu_info leads to DoS [XSA-327, CVE-2020-15564] (#1854458) - non-atomic modification of live EPT PTE leads to DoS [XSA-328, CVE-2020-15567] (#1854464) * Tue Jun 30 2020 Jeff Law Disable LTO --------------------------------------------------------------------------------References: [ 1 ] Bug #1851470 - CVE-2020-15564 xen: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327) https://bugzilla.redhat.com/show_bug.cgi?id=1851470 [ 2 ] Bug #1851471 - CVE-2020-15563 xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319) https://bugzilla.redhat.com/show_bug.cgi?id=1851471 [ 3 ] Bug #1851472 - CVE-2020-15567 xen: non-atomic modification of live EPT PTE leads to DoS (XSA-328) https://bugzilla.redhat.com/show_bug.cgi?id=1851472 [ 4 ] Bug #1851474 - CVE-2020-15566 xen: incorrect error handling in event channel port allocation leads to DoS (XSA-317) https://bugzilla.redhat.com/show_bug.cgi?id=1851474 [ 5 ] Bug #1851475 - CVE-2020-15565 xen: insufficient cache write-back under VT-d leads to DoS (XSA-321) https://bugzilla.redhat.com/show_bug.cgi?id=1851475 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2020-fbc13516af' 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./ . Fedora 32 Security Patch tackles vulnerabilities in xen configurations that might expose systems to DoS intrusions. Check the complete advisory for detailed insights.. Fedora Update, security advisory, DoS issues, xen errors. . Severity: Critical. LinuxSecurity.com Team

Jul 15, 2020 •Critical Fedora