SUSE-SU-2018:0438-1

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SUSE-SU-2018:0438-1

Summary: Security update for xen

Details: This update for xen fixes several issues. These security issues were fixed: - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka 'Spectre' and 'Meltdown' attacks (bsc#1074562, bsc#1068032) - CVE-2017-15595: x86 PV guest OS users were able to cause a DoS (unbounded recursion, stack consumption, and hypervisor crash) or possibly gain privileges via crafted page-table stacking (bsc#1061081) - CVE-2017-17566: Prevent PV guest OS users to cause a denial of service (host OS crash) or gain host OS privileges in shadow mode by mapping a certain auxiliary page (bsc#1070158). - CVE-2017-17563: Prevent guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode (bsc#1070159). - CVE-2017-17564: Prevent guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging incorrect error handling for reference counting in shadow mode (bsc#1070160). - CVE-2017-17565: Prevent PV guest OS users to cause a denial of service (host OS crash) if shadow mode and log-dirty mode are in place, because of an incorrect assertion related to M2P (bsc#1070163). - CVE-2018-5683: The vga_draw_text function allowed 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 (bsc#1076116). - CVE-2017-18030: The cirrus_invalidate_region function allowed 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 (bsc#1076180). These non-security issues were fixed: - bsc#1067317: pass cache=writeback|unsafe|directsync to qemu depending on the libxl disk settings - bsc#1051729: Prevent invalid symlinks after install of SLES 12 SP2 - bsc#1035442: Increased the value of LIBXL_DESTROY_TIMEOUT from 10 to 100 seconds. If many domUs shutdown in parallel the backends couldn't keep up - bsc#1027519: Added several upstream patches

References: https://www.suse.com/support/update/announcement/2018/suse-su-20180438-1/, https://bugzilla.suse.com/1027519, https://bugzilla.suse.com/1035442, https://bugzilla.suse.com/1051729, https://bugzilla.suse.com/1061081, https://bugzilla.suse.com/1067317, https://bugzilla.suse.com/1068032, https://bugzilla.suse.com/1070158, https://bugzilla.suse.com/1070159, https://bugzilla.suse.com/1070160, https://bugzilla.suse.com/1070163, https://bugzilla.suse.com/1074562, https://bugzilla.suse.com/1076116, https://bugzilla.suse.com/1076180, https://www.suse.com/security/cve/CVE-2017-15595, https://www.suse.com/security/cve/CVE-2017-17563, https://www.suse.com/security/cve/CVE-2017-17564, https://www.suse.com/security/cve/CVE-2017-17565, https://www.suse.com/security/cve/CVE-2017-17566, https://www.suse.com/security/cve/CVE-2017-18030, https://www.suse.com/security/cve/CVE-2017-5715, https://www.suse.com/security/cve/CVE-2017-5753, https://www.suse.com/security/cve/CVE-2017-5754, https://www.suse.com/security/cve/CVE-2018-5683