Security update for xen

Announcement ID:	SUSE-SU-2017:0571-1
Rating:	important
References:	bsc#1000195 bsc#1002496 bsc#1005028 bsc#1012651 bsc#1014298 bsc#1014300 bsc#1015169 bsc#1016340 bsc#1022871 bsc#1023004 bsc#1024834
Cross-References:	CVE-2016-9921 CVE-2016-9922 CVE-2017-2615 CVE-2017-2620
CVSS scores:	CVE-2016-9921 ( NVD ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2016-9921 ( NVD ): 6.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2016-9922 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2016-9922 ( NVD ): 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2017-2615 ( NVD ): 5.5 CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L CVE-2017-2620 ( NVD ): 9.9 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected Products:	SUSE Linux Enterprise Desktop 12 SP2 SUSE Linux Enterprise High Performance Computing 12 SP2 SUSE Linux Enterprise Server 12 SP2 SUSE Linux Enterprise Server for SAP Applications 12 SP2 SUSE Linux Enterprise Software Development Kit 12 12-SP2

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

Description:

This update for xen fixes several issues.

These security issues were fixed:

• CVE-2017-2620: In CIRRUS_BLTMODE_MEMSYSSRC mode the bitblit copy routine cirrus_bitblt_cputovideo failed to check the memory region, allowing for an out-of-bounds write that allows for privilege escalation (bsc#1024834).
• CVE-2017-2615: An error in the bitblt copy operation could have allowed a malicious guest administrator to cause an out of bounds memory access, possibly leading to information disclosure or privilege escalation (bsc#1023004).
• A malicious guest could have, by frequently rebooting over extended periods of time, run the host system out of memory, resulting in a Denial of Service (DoS) (bsc#1022871)
• CVE-2016-9921: The Cirrus CLGD 54xx VGA Emulator support was vulnerable to a divide by zero issue while copying VGA data. A privileged user inside guest could have used this flaw to crash the process instance on the host, resulting in DoS (bsc#1015169

These non-security issues were fixed:

• bsc#1000195: Prevent panic on CPU0 while booting on SLES 11 SP3
• bsc#1002496: Added support for reloading clvm in block-dmmd block-dmmd
• bsc#1005028: Fixed building Xen RPMs from Sources

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 Desktop 12 SP2
  zypper in -t patch SUSE-SLE-DESKTOP-12-SP2-2017-296=1
• SUSE Linux Enterprise Software Development Kit 12 12-SP2
  zypper in -t patch SUSE-SLE-SDK-12-SP2-2017-296=1
• SUSE Linux Enterprise High Performance Computing 12 SP2
  zypper in -t patch SUSE-SLE-SERVER-12-SP2-2017-296=1
• SUSE Linux Enterprise Server 12 SP2
  zypper in -t patch SUSE-SLE-SERVER-12-SP2-2017-296=1
• SUSE Linux Enterprise Server for SAP Applications 12 SP2
  zypper in -t patch SUSE-SLE-SERVER-12-SP2-2017-296=1

Package List:

• SUSE Linux Enterprise Desktop 12 SP2 (x86_64)
  • xen-debugsource-4.7.1_06-31.1
  • xen-libs-debuginfo-32bit-4.7.1_06-31.1
  • xen-libs-4.7.1_06-31.1
  • xen-4.7.1_06-31.1
  • xen-libs-32bit-4.7.1_06-31.1
  • xen-libs-debuginfo-4.7.1_06-31.1
• SUSE Linux Enterprise Software Development Kit 12 12-SP2 (aarch64 x86_64)
  • xen-devel-4.7.1_06-31.1
  • xen-debugsource-4.7.1_06-31.1
• SUSE Linux Enterprise High Performance Computing 12 SP2 (x86_64)
  • xen-doc-html-4.7.1_06-31.1
  • xen-tools-4.7.1_06-31.1
  • xen-debugsource-4.7.1_06-31.1
  • xen-tools-debuginfo-4.7.1_06-31.1
  • xen-tools-domU-debuginfo-4.7.1_06-31.1
  • xen-tools-domU-4.7.1_06-31.1
  • xen-libs-debuginfo-32bit-4.7.1_06-31.1
  • xen-libs-4.7.1_06-31.1
  • xen-4.7.1_06-31.1
  • xen-libs-32bit-4.7.1_06-31.1
  • xen-libs-debuginfo-4.7.1_06-31.1
• SUSE Linux Enterprise Server 12 SP2 (x86_64)
  • xen-doc-html-4.7.1_06-31.1
  • xen-tools-4.7.1_06-31.1
  • xen-debugsource-4.7.1_06-31.1
  • xen-tools-debuginfo-4.7.1_06-31.1
  • xen-tools-domU-debuginfo-4.7.1_06-31.1
  • xen-tools-domU-4.7.1_06-31.1
  • xen-libs-debuginfo-32bit-4.7.1_06-31.1
  • xen-libs-4.7.1_06-31.1
  • xen-4.7.1_06-31.1
  • xen-libs-32bit-4.7.1_06-31.1
  • xen-libs-debuginfo-4.7.1_06-31.1
• SUSE Linux Enterprise Server for SAP Applications 12 SP2 (x86_64)
  • xen-doc-html-4.7.1_06-31.1
  • xen-tools-4.7.1_06-31.1
  • xen-debugsource-4.7.1_06-31.1
  • xen-tools-debuginfo-4.7.1_06-31.1
  • xen-tools-domU-debuginfo-4.7.1_06-31.1
  • xen-tools-domU-4.7.1_06-31.1
  • xen-libs-debuginfo-32bit-4.7.1_06-31.1
  • xen-libs-4.7.1_06-31.1
  • xen-4.7.1_06-31.1
  • xen-libs-32bit-4.7.1_06-31.1
  • xen-libs-debuginfo-4.7.1_06-31.1

References:

• https://www.suse.com/security/cve/CVE-2016-9921.html
• https://www.suse.com/security/cve/CVE-2016-9922.html
• https://www.suse.com/security/cve/CVE-2017-2615.html
• https://www.suse.com/security/cve/CVE-2017-2620.html
• https://bugzilla.suse.com/show_bug.cgi?id=1000195
• https://bugzilla.suse.com/show_bug.cgi?id=1002496
• https://bugzilla.suse.com/show_bug.cgi?id=1005028
• https://bugzilla.suse.com/show_bug.cgi?id=1012651
• https://bugzilla.suse.com/show_bug.cgi?id=1014298
• https://bugzilla.suse.com/show_bug.cgi?id=1014300
• https://bugzilla.suse.com/show_bug.cgi?id=1015169
• https://bugzilla.suse.com/show_bug.cgi?id=1016340
• https://bugzilla.suse.com/show_bug.cgi?id=1022871
• https://bugzilla.suse.com/show_bug.cgi?id=1023004
• https://bugzilla.suse.com/show_bug.cgi?id=1024834