Security update for the Linux Kernel

SUSE Security Update: Security update for the Linux Kernel
Announcement ID: SUSE-SU-2019:1870-1
Rating: important
References: #1102340 #1112824 #1130159 #1133190 #1134395 #1135603 #1136922 #1137194 #1138293 #1139751
Cross-References: CVE-2018-20836 CVE-2018-5390 CVE-2018-7191 CVE-2019-11487 CVE-2019-12456 CVE-2019-12614 CVE-2019-12818
Affected Products:
  • SUSE Linux Enterprise Server for SAP 12-SP1
  • SUSE Linux Enterprise Server 12-SP1-LTSS
  • SUSE Linux Enterprise Module for Public Cloud 12

An update that solves 7 vulnerabilities and has three fixes is now available.

Description:



The SUSE Linux Enterprise 12 SP1 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

  • CVE-2018-5390 aka "SegmentSmack": A remote attacker even with relatively low bandwidth could have caused lots of CPU usage by triggering the worst case scenario during IP and/or TCP fragment reassembly (bsc#1102340)
  • CVE-2018-7191: In the tun subsystem in the Linux kernel, dev_get_valid_name was not called before register_netdevice. This allowed local users to cause a denial of service (NULL pointer dereference and panic) via an ioctl(TUNSETIFF) call with a dev name containing a / character. (bnc#1135603)
  • CVE-2018-20836: A race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, could have lead to a use-after-free. (bnc#1134395)
  • CVE-2019-12614: An unchecked kstrdup might have allowed an attacker to cause denial of service (a NULL pointer dereference and system crash). (bnc#1137194)
  • CVE-2019-12818: The nfc_llcp_build_tlv function in net/nfc/llcp_commands.c may have returned NULL. If the caller did not check for this, it would trigger a NULL pointer dereference. This would cause denial of service. (bnc#1138293)
  • CVE-2019-12456: An issue in the MPT3COMMAND case in _ctl_ioctl_main() allowed local users to cause a denial of service or possibly have unspecified other impact by changing the value of ioc_number between two kernel reads of that value, aka a "double fetch" vulnerability. (bsc#1136922)
  • CVE-2019-11487: An attacker could have triggered use-after-free via page reference count overflow on slow filesystems with at least of 140 GiB of RAM available. (bnc#1133190)

The following non-security bugs were fixed:
  • fuse: Don't access pipe->buffers without pipe_lock() (Prerequisity for CVE-2019-11487, bsc#1133190).
  • fuse: call pipe_buf_release() under pipe lock (Prerequisity for CVE-2019-11487, bsc#1133190).
  • mm: /proc/pid/maps: Check permissions when opening proc pid maps (bsc#1130159).
  • pipe: add pipe_buf_get() helper (Prerequisity for CVE-2019-11487, bsc#1133190).
  • tcp: refine memory limit test in tcp_fragment() after CVE-2019-11478 fix (bsc#1139751).
  • x86/bugs: do not default to IBRS even on SKL (bsc#1112824).

Special Instructions and Notes:

Please reboot the system after installing this update.

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 for SAP 12-SP1:
    zypper in -t patch SUSE-SLE-SAP-12-SP1-2019-1870=1
  • SUSE Linux Enterprise Server 12-SP1-LTSS:
    zypper in -t patch SUSE-SLE-SERVER-12-SP1-2019-1870=1
  • SUSE Linux Enterprise Module for Public Cloud 12:
    zypper in -t patch SUSE-SLE-Module-Public-Cloud-12-2019-1870=1

Package List:

  • SUSE Linux Enterprise Server for SAP 12-SP1 (x86_64):
    • kernel-default-3.12.74-60.64.118.1
    • kernel-default-base-3.12.74-60.64.118.1
    • kernel-default-base-debuginfo-3.12.74-60.64.118.1
    • kernel-default-debuginfo-3.12.74-60.64.118.1
    • kernel-default-debugsource-3.12.74-60.64.118.1
    • kernel-default-devel-3.12.74-60.64.118.1
    • kernel-syms-3.12.74-60.64.118.1
    • kernel-xen-3.12.74-60.64.118.1
    • kernel-xen-base-3.12.74-60.64.118.1
    • kernel-xen-base-debuginfo-3.12.74-60.64.118.1
    • kernel-xen-debuginfo-3.12.74-60.64.118.1
    • kernel-xen-debugsource-3.12.74-60.64.118.1
    • kernel-xen-devel-3.12.74-60.64.118.1
    • kgraft-patch-3_12_74-60_64_118-default-1-2.3.1
    • kgraft-patch-3_12_74-60_64_118-xen-1-2.3.1
  • SUSE Linux Enterprise Server for SAP 12-SP1 (noarch):
    • kernel-devel-3.12.74-60.64.118.1
    • kernel-macros-3.12.74-60.64.118.1
    • kernel-source-3.12.74-60.64.118.1
  • SUSE Linux Enterprise Server 12-SP1-LTSS (ppc64le s390x x86_64):
    • kernel-default-3.12.74-60.64.118.1
    • kernel-default-base-3.12.74-60.64.118.1
    • kernel-default-base-debuginfo-3.12.74-60.64.118.1
    • kernel-default-debuginfo-3.12.74-60.64.118.1
    • kernel-default-debugsource-3.12.74-60.64.118.1
    • kernel-default-devel-3.12.74-60.64.118.1
    • kernel-syms-3.12.74-60.64.118.1
  • SUSE Linux Enterprise Server 12-SP1-LTSS (x86_64):
    • kernel-xen-3.12.74-60.64.118.1
    • kernel-xen-base-3.12.74-60.64.118.1
    • kernel-xen-base-debuginfo-3.12.74-60.64.118.1
    • kernel-xen-debuginfo-3.12.74-60.64.118.1
    • kernel-xen-debugsource-3.12.74-60.64.118.1
    • kernel-xen-devel-3.12.74-60.64.118.1
    • kgraft-patch-3_12_74-60_64_118-default-1-2.3.1
    • kgraft-patch-3_12_74-60_64_118-xen-1-2.3.1
  • SUSE Linux Enterprise Server 12-SP1-LTSS (noarch):
    • kernel-devel-3.12.74-60.64.118.1
    • kernel-macros-3.12.74-60.64.118.1
    • kernel-source-3.12.74-60.64.118.1
  • SUSE Linux Enterprise Server 12-SP1-LTSS (s390x):
    • kernel-default-man-3.12.74-60.64.118.1
  • SUSE Linux Enterprise Module for Public Cloud 12 (x86_64):
    • kernel-ec2-3.12.74-60.64.118.1
    • kernel-ec2-debuginfo-3.12.74-60.64.118.1
    • kernel-ec2-debugsource-3.12.74-60.64.118.1
    • kernel-ec2-devel-3.12.74-60.64.118.1
    • kernel-ec2-extra-3.12.74-60.64.118.1
    • kernel-ec2-extra-debuginfo-3.12.74-60.64.118.1

References: