openSUSE Security Update: Security update for xen ______________________________________________________________________________ Announcement ID: openSUSE-SU-2018:1274-1 Rating: important References: #1027519 #1072834 #1080634 #1080635 #1080662 #1087251 #1087252 #1089152 #1089635 #1090820 #1090822 #1090823 Cross-References: CVE-2018-10471 CVE-2018-10472 CVE-2018-7540 CVE-2018-7541 CVE-2018-7542 CVE-2018-8897 Affected Products: openSUSE Leap 42.3 ______________________________________________________________________________ An update that solves 6 vulnerabilities and has 6 fixes is now available. Description: This update for xen to version 4.9.2 fixes several issues. This feature was added: - Added script, udev rule and systemd service to watch for vcpu online/offline events in a HVM domU. They are triggered via 'xl vcpu-set domU N' These security issues were fixed: - CVE-2018-8897: Prevent mishandling of debug exceptions on x86 (XSA-260, bsc#1090820) - Handle HPET timers in IO-APIC mode correctly to prevent malicious or buggy HVM guests from causing a hypervisor crash or potentially privilege escalation/information leaks (XSA-261, bsc#1090822) - Prevent unbounded loop, induced by qemu allowing an attacker to permanently keep a physical CPU core busy (XSA-262, bsc#1090823) - CVE-2018-10472: x86 HVM guest OS users (in certain configurations) were able to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot (bsc#1089152). - CVE-2018-10471: x86 PV guest OS users were able to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754 (bsc#1089635). - CVE-2018-7540: x86 PV guest OS users were able to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing (bsc#1080635). - CVE-2018-7541: Guest OS users were able to cause a denial of service (hypervisor crash) or gain privileges by triggering a grant-table transition from v2 to v1 (bsc#1080662). - CVE-2018-7542: x86 PVH guest OS users were able to cause a denial of service (NULL pointer dereference and hypervisor crash) by leveraging the mishandling of configurations that lack a Local APIC (bsc#1080634). These non-security issues were fixed: - bsc#1087252: Update built-in defaults for xenstored in stubdom, keep default to run xenstored as daemon in dom0 - bsc#1087251: Preserve xen-syms from xen-dbg.gz to allow processing vmcores with crash(1) - bsc#1072834: Prevent unchecked MSR access error This update was imported from the SUSE:SLE-12-SP3:Update update project. Patch Instructions: To install this openSUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: - openSUSE Leap 42.3: zypper in -t patch openSUSE-2018-454=1 Package List: - openSUSE Leap 42.3 (x86_64): xen-4.9.2_04-19.2 xen-debugsource-4.9.2_04-19.2 xen-devel-4.9.2_04-19.2 xen-doc-html-4.9.2_04-19.2 xen-libs-4.9.2_04-19.2 xen-libs-debuginfo-4.9.2_04-19.2 xen-tools-4.9.2_04-19.2 xen-tools-debuginfo-4.9.2_04-19.2 xen-tools-domU-4.9.2_04-19.2 xen-tools-domU-debuginfo-4.9.2_04-19.2 References: https://www.suse.com/security/cve/CVE-2018-10471.html https://www.suse.com/security/cve/CVE-2018-10472.html https://www.suse.com/security/cve/CVE-2018-7540.html https://www.suse.com/security/cve/CVE-2018-7541.html https://www.suse.com/security/cve/CVE-2018-7542.html https://www.suse.com/security/cve/CVE-2018-8897.html https://bugzilla.suse.com/1027519 https://bugzilla.suse.com/1072834 https://bugzilla.suse.com/1080634 https://bugzilla.suse.com/1080635 https://bugzilla.suse.com/1080662 https://bugzilla.suse.com/1087251 https://bugzilla.suse.com/1087252 https://bugzilla.suse.com/1089152 https://bugzilla.suse.com/1089635 https://bugzilla.suse.com/1090820 https://bugzilla.suse.com/1090822 https://bugzilla.suse.com/1090823