Security update for the Linux Kernel (Live Patch 32 for SLE 12 SP1)

Announcement ID:	SUSE-SU-2019:0672-1
Rating:	important
References:	bsc#1103098 bsc#1124729 bsc#1124734 bsc#1128378
Cross-References:	CVE-2018-5391 CVE-2019-6974 CVE-2019-7221 CVE-2019-9213
CVSS scores:	CVE-2018-5391 ( SUSE ): 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2018-5391 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2018-5391 ( NVD ): 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2019-6974 ( SUSE ): 7.8 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2019-6974 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2019-6974 ( NVD ): 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2019-7221 ( SUSE ): 7.5 CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVE-2019-7221 ( NVD ): 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2019-9213 ( SUSE ): 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2019-9213 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2019-9213 ( NVD ): 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products:	SUSE Linux Enterprise Server 12 SP1 SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1 SUSE Linux Enterprise Server for SAP Applications 12 SP1

An update that solves four vulnerabilities can now be installed.

Description:

This update for the Linux Kernel 3.12.74-60_64_107 fixes several issues.

The following security issues were fixed:

• CVE-2019-9213: Expand_downwards in mm/mmap.c lacked a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bsc#1128378).
• CVE-2019-7221: Fixed a user-after-free vulnerability in the KVM hypervisor related to the emulation of a preemption timer, allowing an guest user/process to crash the host kernel. (bsc#1124734).
• CVE-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled reference counting because of a race condition, leading to a use-after-free (bsc#1124729).
• CVE-2018-5391: The Linux kernel was vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker might have caused a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size (bsc#1103098).

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 Server for SAP Applications 12 SP1
  zypper in -t patch SUSE-SLE-SAP-12-SP1-2019-674=1 SUSE-SLE-SAP-12-SP1-2019-670=1 SUSE-SLE-SAP-12-SP1-2019-669=1 SUSE-SLE-SAP-12-SP1-2019-673=1 SUSE-SLE-SAP-12-SP1-2019-672=1 SUSE-SLE-SAP-12-SP1-2019-671=1 SUSE-SLE-SAP-12-SP1-2019-668=1
• SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1
  zypper in -t patch SUSE-SLE-SERVER-12-SP1-2019-674=1 SUSE-SLE-SERVER-12-SP1-2019-670=1 SUSE-SLE-SERVER-12-SP1-2019-669=1 SUSE-SLE-SERVER-12-SP1-2019-673=1 SUSE-SLE-SERVER-12-SP1-2019-672=1 SUSE-SLE-SERVER-12-SP1-2019-671=1 SUSE-SLE-SERVER-12-SP1-2019-668=1

Package List:

• SUSE Linux Enterprise Server for SAP Applications 12 SP1 (x86_64)
  • kgraft-patch-3_12_74-60_64_85-xen-12-2.1
  • kgraft-patch-3_12_74-60_64_93-xen-9-2.1
  • kgraft-patch-3_12_74-60_64_88-default-10-2.1
  • kgraft-patch-3_12_74-60_64_104-default-6-2.1
  • kgraft-patch-3_12_74-60_64_107-default-6-2.1
  • kgraft-patch-3_12_74-60_64_107-xen-6-2.1
  • kgraft-patch-3_12_74-60_64_96-xen-9-2.1
  • kgraft-patch-3_12_74-60_64_88-xen-10-2.1
  • kgraft-patch-3_12_74-60_64_93-default-9-2.1
  • kgraft-patch-3_12_74-60_64_85-default-12-2.1
  • kgraft-patch-3_12_74-60_64_99-default-8-2.1
  • kgraft-patch-3_12_74-60_64_104-xen-6-2.1
  • kgraft-patch-3_12_74-60_64_99-xen-8-2.1
  • kgraft-patch-3_12_74-60_64_96-default-9-2.1
• SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1 (x86_64)
  • kgraft-patch-3_12_74-60_64_85-xen-12-2.1
  • kgraft-patch-3_12_74-60_64_93-xen-9-2.1
  • kgraft-patch-3_12_74-60_64_88-default-10-2.1
  • kgraft-patch-3_12_74-60_64_104-default-6-2.1
  • kgraft-patch-3_12_74-60_64_107-default-6-2.1
  • kgraft-patch-3_12_74-60_64_107-xen-6-2.1
  • kgraft-patch-3_12_74-60_64_96-xen-9-2.1
  • kgraft-patch-3_12_74-60_64_88-xen-10-2.1
  • kgraft-patch-3_12_74-60_64_93-default-9-2.1
  • kgraft-patch-3_12_74-60_64_85-default-12-2.1
  • kgraft-patch-3_12_74-60_64_99-default-8-2.1
  • kgraft-patch-3_12_74-60_64_104-xen-6-2.1
  • kgraft-patch-3_12_74-60_64_99-xen-8-2.1
  • kgraft-patch-3_12_74-60_64_96-default-9-2.1

References:

• https://www.suse.com/security/cve/CVE-2018-5391.html
• https://www.suse.com/security/cve/CVE-2019-6974.html
• https://www.suse.com/security/cve/CVE-2019-7221.html
• https://www.suse.com/security/cve/CVE-2019-9213.html
• https://bugzilla.suse.com/show_bug.cgi?id=1103098
• https://bugzilla.suse.com/show_bug.cgi?id=1124729
• https://bugzilla.suse.com/show_bug.cgi?id=1124734
• https://bugzilla.suse.com/show_bug.cgi?id=1128378