SUSE Security Update: Security update for xen
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Announcement ID:    SUSE-SU-2018:1177-1
Rating:             important
References:         #1027519 #1057493 #1072834 #1083292 #1086107 
                    #1089152 #1089635 #1090820 #1090822 #1090823 
                    
Cross-References:   CVE-2018-10471 CVE-2018-10472 CVE-2018-7550
                    CVE-2018-8897
Affected Products:
                    SUSE Linux Enterprise Server 12-LTSS
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   An update that solves four vulnerabilities and has 6 fixes
   is now available.

Description:

   This update for xen fixes several issues.

   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-2018-7550: The load_multiboot function allowed local guest OS users     to execute arbitrary code on the 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 (bsc#1083292).

   This non-security issue was fixed:

   - bsc#1072834: Prevent unchecked MSR access error
   - bsc#1057493: Prevent DomU crashes
   - bsc#1086107: Fixed problems with backports for XSA-246 and XSA-247


Patch Instructions:

   To install this SUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Server 12-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-2018-819=1



Package List:

   - SUSE Linux Enterprise Server 12-LTSS (x86_64):

      xen-4.4.4_30-22.65.1
      xen-debugsource-4.4.4_30-22.65.1
      xen-doc-html-4.4.4_30-22.65.1
      xen-kmp-default-4.4.4_30_k3.12.61_52.125-22.65.1
      xen-kmp-default-debuginfo-4.4.4_30_k3.12.61_52.125-22.65.1
      xen-libs-32bit-4.4.4_30-22.65.1
      xen-libs-4.4.4_30-22.65.1
      xen-libs-debuginfo-32bit-4.4.4_30-22.65.1
      xen-libs-debuginfo-4.4.4_30-22.65.1
      xen-tools-4.4.4_30-22.65.1
      xen-tools-debuginfo-4.4.4_30-22.65.1
      xen-tools-domU-4.4.4_30-22.65.1
      xen-tools-domU-debuginfo-4.4.4_30-22.65.1


References:

   https://www.suse.com/security/cve/CVE-2018-10471.html
   https://www.suse.com/security/cve/CVE-2018-10472.html
   https://www.suse.com/security/cve/CVE-2018-7550.html
   https://www.suse.com/security/cve/CVE-2018-8897.html
   https://bugzilla.suse.com/1027519
   https://bugzilla.suse.com/1057493
   https://bugzilla.suse.com/1072834
   https://bugzilla.suse.com/1083292
   https://bugzilla.suse.com/1086107
   https://bugzilla.suse.com/1089152
   https://bugzilla.suse.com/1089635
   https://bugzilla.suse.com/1090820
   https://bugzilla.suse.com/1090822
   https://bugzilla.suse.com/1090823

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