Security update for kvm SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2018:1077-1 Final 1 1 2018-04-25T12:14:56Z current 2018-04-25T12:14:56Z 2018-04-25T12:14:56Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for kvm This update for kvm fixes the following issues: - This update has the next round of Spectre v2 related patches, which now integrates with corresponding changes in libvirt. A January 2018 release of qemu initially addressed the Spectre v2 vulnerability for KVM guests by exposing the spec-ctrl feature for all x86 vcpu types, which was the quick and dirty approach, but not the proper solution. We remove that initial patch and now rely on patches from upstream. This update defines spec_ctrl and ibpb cpu feature flags as well as new cpu models which are clones of existing models with either -IBRS or -IBPB added to the end of the model name. These new vcpu models explicitly include the new feature(s), whereas the feature flags can be added to the cpu parameter as with other features. In short, for continued Spectre v2 protection, ensure that either the appropriate cpu feature flag is added to the QEMU command-line, or one of the new cpu models is used. Although migration from older versions is supported, the new cpu features won't be properly exposed to the guest until it is restarted with the cpu features explicitly added. A reboot is insufficient. - A warning patch is added which attempts to detect a migration from a qemu version which had the quick and dirty fix (it only detects certain cases, but hopefully is helpful.) For additional information on Spectre v2 as it relates to QEMU, see: https://www.qemu.org/2018/02/14/qemu-2-11-1-and-spectre-update/ (CVE-2017-5715 bsc#1068032) - A patch is added to continue to detect Spectre v2 mitigation features (as shown by cpuid), and if found provide that feature to guests, even if running on older KVM (kernel) versions which do not yet expose that feature to QEMU. (bsc#1082276) These two patches will be removed when we can reasonably assume everyone is running with the appropriate updates. - Security fixes for the following CVE issues: (bsc#1076114 CVE-2018-5683) (bsc#1083291 CVE-2018-7550) - This patch is already included, add here for CVE track (bsc#1076179 CVE-2017-18030) - Toolchain changes have cause the built size of pxe-virtio.rom to exceed 64K. Tweak rarely used strings in code to reduce size of the binary so it fits again. - Eliminate bogus use of CPUID_7_0_EDX_PRED_CMD which we've carried since the initial Spectre v2 patch was added. EDX bit 27 of CPUID Leaf 07H, Sub-leaf 0 provides status on STIBP, and not the PRED_CMD MSR. Exposing the STIBP CPUID feature bit to the guest is wrong in general, since the VM doesn't directly control the scheduling of physical hyperthreads. This is left strictly to the L0 hypervisor. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). slessp4-kvm-13571 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2018/suse-su-20181077-1/ Link for SUSE-SU-2018:1077-1 https://lists.opensuse.org/opensuse-security-announce/2018-04/msg00071.html E-Mail link for SUSE-SU-2018:1077-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1068032 SUSE Bug 1068032 https://bugzilla.suse.com/1076114 SUSE Bug 1076114 https://bugzilla.suse.com/1076179 SUSE Bug 1076179 https://bugzilla.suse.com/1082276 SUSE Bug 1082276 https://bugzilla.suse.com/1083291 SUSE Bug 1083291 https://www.suse.com/security/cve/CVE-2017-18030/ SUSE CVE CVE-2017-18030 page https://www.suse.com/security/cve/CVE-2017-5715/ SUSE CVE CVE-2017-5715 page https://www.suse.com/security/cve/CVE-2018-5683/ SUSE CVE CVE-2018-5683 page https://www.suse.com/security/cve/CVE-2018-7550/ SUSE CVE CVE-2018-7550 page SUSE Linux Enterprise Server 11 SP4 SUSE Linux Enterprise Server for SAP Applications 11 SP4 kvm-1.4.2-60.9.1 kvm-1.4.2-60.9.1 as a component of SUSE Linux Enterprise Server 11 SP4 kvm-1.4.2-60.9.1 as a component of SUSE Linux Enterprise Server for SAP Applications 11 SP4 The cirrus_invalidate_region function in hw/display/cirrus_vga.c in Qemu allows local OS guest privileged users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors related to negative pitch. CVE-2017-18030 SUSE Linux Enterprise Server 11 SP4:kvm-1.4.2-60.9.1 SUSE Linux Enterprise Server for SAP Applications 11 SP4:kvm-1.4.2-60.9.1 low To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2018/suse-su-20181077-1/ https://www.suse.com/security/cve/CVE-2017-18030.html CVE-2017-18030 https://bugzilla.suse.com/1076179 SUSE Bug 1076179 https://bugzilla.suse.com/1076180 SUSE Bug 1076180 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis. CVE-2017-5715 SUSE Linux Enterprise Server 11 SP4:kvm-1.4.2-60.9.1 SUSE Linux Enterprise Server for SAP Applications 11 SP4:kvm-1.4.2-60.9.1 important 4.7 AV:L/AC:M/Au:N/C:C/I:N/A:N To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2018/suse-su-20181077-1/ https://www.suse.com/security/cve/CVE-2017-5715.html CVE-2017-5715 https://bugzilla.suse.com/1068032 SUSE Bug 1068032 https://bugzilla.suse.com/1074562 SUSE Bug 1074562 https://bugzilla.suse.com/1074578 SUSE Bug 1074578 https://bugzilla.suse.com/1074701 SUSE Bug 1074701 https://bugzilla.suse.com/1074741 SUSE Bug 1074741 https://bugzilla.suse.com/1074919 SUSE Bug 1074919 https://bugzilla.suse.com/1075006 SUSE Bug 1075006 https://bugzilla.suse.com/1075007 SUSE Bug 1075007 https://bugzilla.suse.com/1075262 SUSE Bug 1075262 https://bugzilla.suse.com/1075419 SUSE Bug 1075419 https://bugzilla.suse.com/1076115 SUSE Bug 1076115 https://bugzilla.suse.com/1076372 SUSE Bug 1076372 https://bugzilla.suse.com/1076606 SUSE Bug 1076606 https://bugzilla.suse.com/1078353 SUSE Bug 1078353 https://bugzilla.suse.com/1080039 SUSE Bug 1080039 https://bugzilla.suse.com/1087887 SUSE Bug 1087887 https://bugzilla.suse.com/1087939 SUSE Bug 1087939 https://bugzilla.suse.com/1088147 SUSE Bug 1088147 https://bugzilla.suse.com/1089055 SUSE Bug 1089055 https://bugzilla.suse.com/1091815 SUSE Bug 1091815 https://bugzilla.suse.com/1095735 SUSE Bug 1095735 https://bugzilla.suse.com/1102517 SUSE Bug 1102517 https://bugzilla.suse.com/1105108 SUSE Bug 1105108 https://bugzilla.suse.com/1126516 SUSE Bug 1126516 https://bugzilla.suse.com/1173489 SUSE Bug 1173489 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 https://bugzilla.suse.com/1201457 SUSE Bug 1201457 https://bugzilla.suse.com/1201877 SUSE Bug 1201877 https://bugzilla.suse.com/1203236 SUSE Bug 1203236 The vga_draw_text function in Qemu allows local OS guest privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation. CVE-2018-5683 SUSE Linux Enterprise Server 11 SP4:kvm-1.4.2-60.9.1 SUSE Linux Enterprise Server for SAP Applications 11 SP4:kvm-1.4.2-60.9.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2018/suse-su-20181077-1/ https://www.suse.com/security/cve/CVE-2018-5683.html CVE-2018-5683 https://bugzilla.suse.com/1076114 SUSE Bug 1076114 https://bugzilla.suse.com/1076116 SUSE Bug 1076116 https://bugzilla.suse.com/1178658 SUSE Bug 1178658 The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access. CVE-2018-7550 SUSE Linux Enterprise Server 11 SP4:kvm-1.4.2-60.9.1 SUSE Linux Enterprise Server for SAP Applications 11 SP4:kvm-1.4.2-60.9.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2018/suse-su-20181077-1/ https://www.suse.com/security/cve/CVE-2018-7550.html CVE-2018-7550 https://bugzilla.suse.com/1083291 SUSE Bug 1083291 https://bugzilla.suse.com/1083292 SUSE Bug 1083292