Security update for xen

Announcement ID:	SUSE-SU-2019:0921-1
Rating:	important
References:	bsc#1026236 bsc#1114988 bsc#1123157 bsc#1126140 bsc#1126141 bsc#1126192 bsc#1126195 bsc#1126196 bsc#1126198 bsc#1126201 bsc#1127400 bsc#1129623
Cross-References:	CVE-2018-19967 CVE-2019-6778 CVE-2019-9824
CVSS scores:	CVE-2018-19967 ( SUSE ): 5.6 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2018-19967 ( NVD ): 6.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2019-6778 ( SUSE ): 7.8 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2019-6778 ( NVD ): 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2019-9824 ( SUSE ): 2.8 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N CVE-2019-9824 ( NVD ): 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Products:	SUSE Enterprise Storage 4 SUSE Linux Enterprise High Performance Computing 12 SP2 SUSE Linux Enterprise High Performance Computing 12 SP3 SUSE Linux Enterprise High Performance Computing 12 SP4 SUSE Linux Enterprise High Performance Computing 12 SP5 SUSE Linux Enterprise Point of Service Image Server 12 12-SP2 SUSE Linux Enterprise Server 12 SP2 SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2 SUSE Linux Enterprise Server 12 SP2 ESPOS 12-SP2 SUSE Linux Enterprise Server 12 SP2 LTSS 12-SP2 SUSE Linux Enterprise Server 12 SP3 SUSE Linux Enterprise Server 12 SP4 SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Server for SAP Applications 12 SP2 SUSE Linux Enterprise Server for SAP Applications 12 SP3 SUSE Linux Enterprise Server for SAP Applications 12 SP4 SUSE Linux Enterprise Server for SAP Applications 12 SP5 SUSE OpenStack Cloud 7

An update that solves three vulnerabilities and has nine security fixes can now be installed.

Description:

This update for xen fixes the following issues:

Security issues fixed:

• Fixed an issue which could allow malicious PV guests may cause a host crash or gain access to data pertaining to other guests.Additionally, vulnerable configurations are likely to be unstable even in the absence of an attack (bsc#1126198).
• Fixed multiple access violations introduced by XENMEM_exchange hypercall which could allow a single PV guest to leak arbitrary amounts of memory, leading to a denial of service (bsc#1126192).
• Fixed an issue which could allow a malicious unprivileged guest userspace process to escalate its privilege to that of other userspace processes in the same guest and potentially thereby to that of the guest operating system (bsc#1126201).
• Fixed an issue which could allow a malicious or buggy x86 PV guest kernels can mount a Denial of Service attack affecting the whole system (bsc#1126196).
• Fixed an issue which could allow an untrusted PV domain with access to a physical device to DMA into its own pagetables leading to privilege escalation (bsc#1126195).
• CVE-2019-6778: Fixed a heap buffer overflow in tcp_emu() found in slirp (bsc#1123157).
• Fixed an issue which could allow malicious 64bit PV guests to cause a host crash (bsc#1127400).
• Fixed an issue which could allow malicious or buggy guests with passed through PCI devices to be able to escalate their privileges, crash the host, or access data belonging to other guests. Additionally memory leaks were also possible (bsc#1126140).
• Fixed a race condition issue which could allow malicious PV guests to escalate their privilege to that of the hypervisor (bsc#1126141).
• CVE-2019-9824: Fixed an information leak in SLiRP networking implementation which could allow a user/process to read uninitialised stack memory contents (bsc#1129623).
• CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the host, resulting in a Denial of Service (DoS). (XSA-282) (bsc#1114988)

Other issue addressed:

• Added Xen cmdline option "suse_vtsc_tolerance" to avoid TSC emulation for HVM domUs (bsc#1026236).

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 OpenStack Cloud 7
  zypper in -t patch SUSE-OpenStack-Cloud-7-2019-921=1
• SUSE Linux Enterprise Point of Service Image Server 12 12-SP2
  zypper in -t patch SUSE-SLE-POS-12-SP2-CLIENT-2019-921=1
• SUSE Linux Enterprise Server for SAP Applications 12 SP2
  zypper in -t patch SUSE-SLE-SAP-12-SP2-2019-921=1
• SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2
  zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2019-921=1
• SUSE Linux Enterprise Server 12 SP2 ESPOS 12-SP2
  zypper in -t patch SUSE-SLE-SERVER-12-SP2-ESPOS-2019-921=1
• SUSE Linux Enterprise Server 12 SP2 LTSS 12-SP2
  zypper in -t patch SUSE-SLE-SERVER-12-SP2-2019-921=1
• SUSE Enterprise Storage 4
  zypper in -t patch SUSE-Storage-4-2019-921=1

Package List:

• SUSE OpenStack Cloud 7 (x86_64)
  • xen-doc-html-4.7.6_06-43.48.1
  • xen-libs-32bit-4.7.6_06-43.48.1
  • xen-4.7.6_06-43.48.1
  • xen-libs-debuginfo-4.7.6_06-43.48.1
  • xen-debugsource-4.7.6_06-43.48.1
  • xen-tools-4.7.6_06-43.48.1
  • xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
  • xen-tools-domU-debuginfo-4.7.6_06-43.48.1
  • xen-tools-domU-4.7.6_06-43.48.1
  • xen-tools-debuginfo-4.7.6_06-43.48.1
  • xen-libs-4.7.6_06-43.48.1
• SUSE Linux Enterprise Point of Service Image Server 12 12-SP2 (x86_64)
  • xen-doc-html-4.7.6_06-43.48.1
  • xen-libs-32bit-4.7.6_06-43.48.1
  • xen-4.7.6_06-43.48.1
  • xen-libs-debuginfo-4.7.6_06-43.48.1
  • xen-debugsource-4.7.6_06-43.48.1
  • xen-tools-4.7.6_06-43.48.1
  • xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
  • xen-tools-domU-debuginfo-4.7.6_06-43.48.1
  • xen-tools-domU-4.7.6_06-43.48.1
  • xen-tools-debuginfo-4.7.6_06-43.48.1
  • xen-libs-4.7.6_06-43.48.1
• SUSE Linux Enterprise Server for SAP Applications 12 SP2 (x86_64)
  • xen-doc-html-4.7.6_06-43.48.1
  • xen-libs-32bit-4.7.6_06-43.48.1
  • xen-4.7.6_06-43.48.1
  • xen-libs-debuginfo-4.7.6_06-43.48.1
  • xen-debugsource-4.7.6_06-43.48.1
  • xen-tools-4.7.6_06-43.48.1
  • xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
  • xen-tools-domU-debuginfo-4.7.6_06-43.48.1
  • xen-tools-domU-4.7.6_06-43.48.1
  • xen-tools-debuginfo-4.7.6_06-43.48.1
  • xen-libs-4.7.6_06-43.48.1
• SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2 (x86_64)
  • xen-doc-html-4.7.6_06-43.48.1
  • xen-libs-32bit-4.7.6_06-43.48.1
  • xen-4.7.6_06-43.48.1
  • xen-libs-debuginfo-4.7.6_06-43.48.1
  • xen-debugsource-4.7.6_06-43.48.1
  • xen-tools-4.7.6_06-43.48.1
  • xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
  • xen-tools-domU-debuginfo-4.7.6_06-43.48.1
  • xen-tools-domU-4.7.6_06-43.48.1
  • xen-tools-debuginfo-4.7.6_06-43.48.1
  • xen-libs-4.7.6_06-43.48.1
• SUSE Linux Enterprise Server 12 SP2 ESPOS 12-SP2 (x86_64)
  • xen-doc-html-4.7.6_06-43.48.1
  • xen-libs-32bit-4.7.6_06-43.48.1
  • xen-4.7.6_06-43.48.1
  • xen-libs-debuginfo-4.7.6_06-43.48.1
  • xen-debugsource-4.7.6_06-43.48.1
  • xen-tools-4.7.6_06-43.48.1
  • xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
  • xen-tools-domU-debuginfo-4.7.6_06-43.48.1
  • xen-tools-domU-4.7.6_06-43.48.1
  • xen-tools-debuginfo-4.7.6_06-43.48.1
  • xen-libs-4.7.6_06-43.48.1
• SUSE Linux Enterprise Server 12 SP2 LTSS 12-SP2 (x86_64)
  • xen-doc-html-4.7.6_06-43.48.1
  • xen-libs-32bit-4.7.6_06-43.48.1
  • xen-4.7.6_06-43.48.1
  • xen-libs-debuginfo-4.7.6_06-43.48.1
  • xen-debugsource-4.7.6_06-43.48.1
  • xen-tools-4.7.6_06-43.48.1
  • xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
  • xen-tools-domU-debuginfo-4.7.6_06-43.48.1
  • xen-tools-domU-4.7.6_06-43.48.1
  • xen-tools-debuginfo-4.7.6_06-43.48.1
  • xen-libs-4.7.6_06-43.48.1
• SUSE Enterprise Storage 4 (x86_64)
  • xen-doc-html-4.7.6_06-43.48.1
  • xen-libs-32bit-4.7.6_06-43.48.1
  • xen-4.7.6_06-43.48.1
  • xen-libs-debuginfo-4.7.6_06-43.48.1
  • xen-debugsource-4.7.6_06-43.48.1
  • xen-tools-4.7.6_06-43.48.1
  • xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
  • xen-tools-domU-debuginfo-4.7.6_06-43.48.1
  • xen-tools-domU-4.7.6_06-43.48.1
  • xen-tools-debuginfo-4.7.6_06-43.48.1
  • xen-libs-4.7.6_06-43.48.1

References:

• https://www.suse.com/security/cve/CVE-2018-19967.html
• https://www.suse.com/security/cve/CVE-2019-6778.html
• https://www.suse.com/security/cve/CVE-2019-9824.html
• https://bugzilla.suse.com/show_bug.cgi?id=1026236
• https://bugzilla.suse.com/show_bug.cgi?id=1114988
• https://bugzilla.suse.com/show_bug.cgi?id=1123157
• https://bugzilla.suse.com/show_bug.cgi?id=1126140
• https://bugzilla.suse.com/show_bug.cgi?id=1126141
• https://bugzilla.suse.com/show_bug.cgi?id=1126192
• https://bugzilla.suse.com/show_bug.cgi?id=1126195
• https://bugzilla.suse.com/show_bug.cgi?id=1126196
• https://bugzilla.suse.com/show_bug.cgi?id=1126198
• https://bugzilla.suse.com/show_bug.cgi?id=1126201
• https://bugzilla.suse.com/show_bug.cgi?id=1127400
• https://bugzilla.suse.com/show_bug.cgi?id=1129623