Security update for xen SUSE Patch security@suse.de SUSE Security Team openSUSE-SU-2018:1274-1 Final 1 1 2018-05-11T17:35:29Z current 2018-05-11T17:35:29Z 2018-05-11T17:35:29Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for xen 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. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://lists.opensuse.org/opensuse-security-announce/2018-05/msg00059.html E-Mail link for openSUSE-SU-2018:1274-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings openSUSE Leap 42.3 xen-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-tools-4.9.2_04-19.2 xen-tools-domU-4.9.2_04-19.2 xen-4.9.2_04-19.2 as a component of openSUSE Leap 42.3 xen-devel-4.9.2_04-19.2 as a component of openSUSE Leap 42.3 xen-doc-html-4.9.2_04-19.2 as a component of openSUSE Leap 42.3 xen-libs-4.9.2_04-19.2 as a component of openSUSE Leap 42.3 xen-tools-4.9.2_04-19.2 as a component of openSUSE Leap 42.3 xen-tools-domU-4.9.2_04-19.2 as a component of openSUSE Leap 42.3 An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users 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. CVE-2018-10471 openSUSE Leap 42.3:xen-4.9.2_04-19.2 openSUSE Leap 42.3:xen-devel-4.9.2_04-19.2 openSUSE Leap 42.3:xen-doc-html-4.9.2_04-19.2 openSUSE Leap 42.3:xen-libs-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-domU-4.9.2_04-19.2 moderate Please Install the update. https://lists.opensuse.org/opensuse-security-announce/2018-05/msg00059.html https://www.suse.com/security/cve/CVE-2018-10471.html CVE-2018-10471 https://bugzilla.suse.com/1089635 SUSE Bug 1089635 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users (in certain configurations) 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. CVE-2018-10472 openSUSE Leap 42.3:xen-4.9.2_04-19.2 openSUSE Leap 42.3:xen-devel-4.9.2_04-19.2 openSUSE Leap 42.3:xen-doc-html-4.9.2_04-19.2 openSUSE Leap 42.3:xen-libs-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-domU-4.9.2_04-19.2 moderate Please Install the update. https://lists.opensuse.org/opensuse-security-announce/2018-05/msg00059.html https://www.suse.com/security/cve/CVE-2018-10472.html CVE-2018-10472 https://bugzilla.suse.com/1089152 SUSE Bug 1089152 An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing. CVE-2018-7540 openSUSE Leap 42.3:xen-4.9.2_04-19.2 openSUSE Leap 42.3:xen-devel-4.9.2_04-19.2 openSUSE Leap 42.3:xen-doc-html-4.9.2_04-19.2 openSUSE Leap 42.3:xen-libs-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-domU-4.9.2_04-19.2 moderate Please Install the update. https://lists.opensuse.org/opensuse-security-announce/2018-05/msg00059.html https://www.suse.com/security/cve/CVE-2018-7540.html CVE-2018-7540 https://bugzilla.suse.com/1080635 SUSE Bug 1080635 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 An issue was discovered in Xen through 4.10.x allowing guest OS users to cause a denial of service (hypervisor crash) or gain privileges by triggering a grant-table transition from v2 to v1. CVE-2018-7541 openSUSE Leap 42.3:xen-4.9.2_04-19.2 openSUSE Leap 42.3:xen-devel-4.9.2_04-19.2 openSUSE Leap 42.3:xen-doc-html-4.9.2_04-19.2 openSUSE Leap 42.3:xen-libs-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-domU-4.9.2_04-19.2 important Please Install the update. https://lists.opensuse.org/opensuse-security-announce/2018-05/msg00059.html https://www.suse.com/security/cve/CVE-2018-7541.html CVE-2018-7541 https://bugzilla.suse.com/1080662 SUSE Bug 1080662 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 An issue was discovered in Xen 4.8.x through 4.10.x allowing x86 PVH guest OS users to cause a denial of service (NULL pointer dereference and hypervisor crash) by leveraging the mishandling of configurations that lack a Local APIC. CVE-2018-7542 openSUSE Leap 42.3:xen-4.9.2_04-19.2 openSUSE Leap 42.3:xen-devel-4.9.2_04-19.2 openSUSE Leap 42.3:xen-doc-html-4.9.2_04-19.2 openSUSE Leap 42.3:xen-libs-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-domU-4.9.2_04-19.2 important Please Install the update. https://lists.opensuse.org/opensuse-security-announce/2018-05/msg00059.html https://www.suse.com/security/cve/CVE-2018-7542.html CVE-2018-7542 https://bugzilla.suse.com/1080634 SUSE Bug 1080634 A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs. CVE-2018-8897 openSUSE Leap 42.3:xen-4.9.2_04-19.2 openSUSE Leap 42.3:xen-devel-4.9.2_04-19.2 openSUSE Leap 42.3:xen-doc-html-4.9.2_04-19.2 openSUSE Leap 42.3:xen-libs-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-4.9.2_04-19.2 openSUSE Leap 42.3:xen-tools-domU-4.9.2_04-19.2 moderate Please Install the update. https://lists.opensuse.org/opensuse-security-announce/2018-05/msg00059.html https://www.suse.com/security/cve/CVE-2018-8897.html CVE-2018-8897 https://bugzilla.suse.com/1087078 SUSE Bug 1087078 https://bugzilla.suse.com/1087088 SUSE Bug 1087088 https://bugzilla.suse.com/1090368 SUSE Bug 1090368 https://bugzilla.suse.com/1090820 SUSE Bug 1090820 https://bugzilla.suse.com/1090869 SUSE Bug 1090869 https://bugzilla.suse.com/1092497 SUSE Bug 1092497 https://bugzilla.suse.com/1098813 SUSE Bug 1098813 https://bugzilla.suse.com/1100835 SUSE Bug 1100835 https://bugzilla.suse.com/1178658 SUSE Bug 1178658