SUSE Security Update: Security update for xen ______________________________________________________________________________ Announcement ID: SUSE-SU-2018:0601-1 Rating: important References: #1027519 #1035442 #1061081 #1068032 #1070158 #1070159 #1070160 #1070163 #1074562 #1076116 #1076180 #1080635 #1080662 Cross-References: CVE-2017-15595 CVE-2017-17563 CVE-2017-17564 CVE-2017-17565 CVE-2017-17566 CVE-2017-18030 CVE-2017-5715 CVE-2017-5753 CVE-2017-5754 CVE-2018-5683 Affected Products: SUSE Linux Enterprise Server 12-LTSS ______________________________________________________________________________ An update that solves 10 vulnerabilities and has three fixes is now available. Description: 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-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). - 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). - Added missing intermediate preemption checks for guest requesting removal of memory. This allowed malicious guest administrator to cause denial of service due to the high cost of this operation (bsc#1080635). - Because of XEN not returning the proper error messages when transitioning grant tables from v2 to v1 a malicious guest was able to cause DoS or potentially allowed for privilege escalation as well as information leaks (bsc#1080662). This non-security issue was fixed: - 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 - Upstream patches from Jan (bsc#1027519) Patch Instructions: To install this SUSE Security Update use YaST online_update. Alternatively you can run the command listed for your product: - SUSE Linux Enterprise Server 12-LTSS: zypper in -t patch SUSE-SLE-SERVER-12-2018-408=1 To bring your system up-to-date, use "zypper patch". Package List: - SUSE Linux Enterprise Server 12-LTSS (x86_64): xen-4.4.4_28-22.62.1 xen-debugsource-4.4.4_28-22.62.1 xen-doc-html-4.4.4_28-22.62.1 xen-kmp-default-4.4.4_28_k3.12.61_52.119-22.62.1 xen-kmp-default-debuginfo-4.4.4_28_k3.12.61_52.119-22.62.1 xen-libs-32bit-4.4.4_28-22.62.1 xen-libs-4.4.4_28-22.62.1 xen-libs-debuginfo-32bit-4.4.4_28-22.62.1 xen-libs-debuginfo-4.4.4_28-22.62.1 xen-tools-4.4.4_28-22.62.1 xen-tools-debuginfo-4.4.4_28-22.62.1 xen-tools-domU-4.4.4_28-22.62.1 xen-tools-domU-debuginfo-4.4.4_28-22.62.1 References: https://www.suse.com/security/cve/CVE-2017-15595.html https://www.suse.com/security/cve/CVE-2017-17563.html https://www.suse.com/security/cve/CVE-2017-17564.html https://www.suse.com/security/cve/CVE-2017-17565.html https://www.suse.com/security/cve/CVE-2017-17566.html https://www.suse.com/security/cve/CVE-2017-18030.html https://www.suse.com/security/cve/CVE-2017-5715.html https://www.suse.com/security/cve/CVE-2017-5753.html https://www.suse.com/security/cve/CVE-2017-5754.html https://www.suse.com/security/cve/CVE-2018-5683.html https://bugzilla.suse.com/1027519 https://bugzilla.suse.com/1035442 https://bugzilla.suse.com/1061081 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://bugzilla.suse.com/1080635 https://bugzilla.suse.com/1080662 -- To unsubscribe, e-mail: opensuse-security-announce+unsubscribe@opensuse.org For additional commands, e-mail: opensuse-security-announce+help@opensuse.org