Security update for xen

Announcement ID:	SUSE-SU-2018:0638-1
Rating:	important
References:	bsc#1027519 bsc#1031382 bsc#1035442 bsc#1061081 bsc#1068032 bsc#1070158 bsc#1070159 bsc#1070160 bsc#1070163 bsc#1074562 bsc#1076116 bsc#1076180 bsc#1080635 bsc#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
CVSS scores:	CVE-2017-15595 ( SUSE ): 8.1 CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H CVE-2017-15595 ( NVD ): 8.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2017-17563 ( SUSE ): 6.5 CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L CVE-2017-17563 ( NVD ): 7.8 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2017-17564 ( SUSE ): 6.5 CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L CVE-2017-17564 ( NVD ): 7.8 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2017-17565 ( SUSE ): 4.1 CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L CVE-2017-17565 ( NVD ): 5.6 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2017-17566 ( SUSE ): 6.5 CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L CVE-2017-17566 ( NVD ): 7.8 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2017-18030 ( SUSE ): 2.8 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L CVE-2017-18030 ( NVD ): 4.4 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVE-2017-5715 ( SUSE ): 7.1 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N CVE-2017-5715 ( NVD ): 5.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N CVE-2017-5715 ( NVD ): 5.6 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N CVE-2017-5753 ( SUSE ): 5.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N CVE-2017-5753 ( SUSE ): 7.1 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N CVE-2017-5753 ( NVD ): 5.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N CVE-2017-5753 ( NVD ): 5.6 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N CVE-2017-5754 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVE-2017-5754 ( SUSE ): 7.1 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N CVE-2017-5754 ( NVD ): 5.6 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N CVE-2018-5683 ( SUSE ): 4.2 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L CVE-2018-5683 ( NVD ): 6.0 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Affected Products:	SLES for SAP Applications 11-SP4 SUSE Linux Enterprise Server 11 SP4 SUSE Linux Enterprise Software Development Kit 11 SP4

An update that solves 10 vulnerabilities and has four security fixes can now be installed.

Description:

This update for xen fixes several issues.

This new feature was included:

• add script and sysv service to watch for vcpu online/offline events in a HVM domU

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).

These non-security issues were 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
• bsc#1031382: Prevent VMs from crashing when migrating between dom0 hosts in case read() returns zero on the receiver side.

Patch Instructions:

To install this SUSE 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 Software Development Kit 11 SP4
  zypper in -t patch sdksp4-xen-13501=1
• SUSE Linux Enterprise Server 11 SP4
  zypper in -t patch slessp4-xen-13501=1
• SLES for SAP Applications 11-SP4
  zypper in -t patch slessp4-xen-13501=1

Package List:

• SUSE Linux Enterprise Software Development Kit 11 SP4 (x86_64 i586)
  • xen-devel-4.4.4_28-61.23.2
• SUSE Linux Enterprise Server 11 SP4 (x86_64 i586)
  • xen-libs-4.4.4_28-61.23.2
  • xen-kmp-default-4.4.4_28_3.0.101_108.35-61.23.2
  • xen-tools-domU-4.4.4_28-61.23.2
• SUSE Linux Enterprise Server 11 SP4 (i586)
  • xen-kmp-pae-4.4.4_28_3.0.101_108.35-61.23.2
• SUSE Linux Enterprise Server 11 SP4 (x86_64)
  • xen-doc-html-4.4.4_28-61.23.2
  • xen-tools-4.4.4_28-61.23.2
  • xen-4.4.4_28-61.23.2
  • xen-libs-32bit-4.4.4_28-61.23.2
• SLES for SAP Applications 11-SP4 (x86_64)
  • xen-tools-4.4.4_28-61.23.2
  • xen-libs-32bit-4.4.4_28-61.23.2
  • xen-libs-4.4.4_28-61.23.2
  • xen-kmp-default-4.4.4_28_3.0.101_108.35-61.23.2
  • xen-4.4.4_28-61.23.2
  • xen-doc-html-4.4.4_28-61.23.2
  • xen-tools-domU-4.4.4_28-61.23.2

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/show_bug.cgi?id=1027519
• https://bugzilla.suse.com/show_bug.cgi?id=1031382
• https://bugzilla.suse.com/show_bug.cgi?id=1035442
• https://bugzilla.suse.com/show_bug.cgi?id=1061081
• https://bugzilla.suse.com/show_bug.cgi?id=1068032
• https://bugzilla.suse.com/show_bug.cgi?id=1070158
• https://bugzilla.suse.com/show_bug.cgi?id=1070159
• https://bugzilla.suse.com/show_bug.cgi?id=1070160
• https://bugzilla.suse.com/show_bug.cgi?id=1070163
• https://bugzilla.suse.com/show_bug.cgi?id=1074562
• https://bugzilla.suse.com/show_bug.cgi?id=1076116
• https://bugzilla.suse.com/show_bug.cgi?id=1076180
• https://bugzilla.suse.com/show_bug.cgi?id=1080635
• https://bugzilla.suse.com/show_bug.cgi?id=1080662