SUSE-SU-2017:1146-1

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SUSE-SU-2017:1146-1

Summary: Security update for xen

Details: This update for xen fixes several security issues: - A malicious 64-bit PV guest may be able to access all of system memory, allowing for all of privilege escalation, host crashes, and information leaks by placing a IRET hypercall in the middle of a multicall batch (XSA-213, bsc#1034843) - A malicious pair of guests may be able to access all of system memory, allowing for all of privilege escalation, host crashes, and information leaks because of a missing check when transfering pages via GNTTABOP_transfer (XSA-214, bsc#1034844). - CVE-2017-7718: hw/display/cirrus_vga_rop.h allowed local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors related to copying VGA data via the cirrus_bitblt_rop_fwd_transp_ and cirrus_bitblt_rop_fwd_ functions (bsc#1034994). - CVE-2016-9603: A privileged user within the guest VM could have caused a heap overflow in the device model process, potentially escalating their privileges to that of the device model process (bsc#1028655)

References: https://www.suse.com/support/update/announcement/2017/suse-su-20171146-1/, https://bugzilla.suse.com/1028655, https://bugzilla.suse.com/1033948, https://bugzilla.suse.com/1034843, https://bugzilla.suse.com/1034844, https://bugzilla.suse.com/1034845, https://bugzilla.suse.com/1034994, https://bugzilla.suse.com/1035483, https://www.suse.com/security/cve/CVE-2016-9603, https://www.suse.com/security/cve/CVE-2017-7718, https://www.suse.com/security/cve/CVE-2017-7980, https://www.suse.com/security/cve/CVE-2017-7995