SUSE Security Update: Security update for the Linux Kernel
______________________________________________________________________________

Announcement ID:    SUSE-SU-2019:1692-1
Rating:             important
References:         #1090078 #1110785 #1113769 #1120843 #1120885 
                    #1125580 #1125931 #1131543 #1131587 #1132374 
                    #1132472 #1134848 #1135281 #1136424 #1136446 
                    #1137586 
Cross-References:   CVE-2018-17972 CVE-2019-11190 CVE-2019-11477
                    CVE-2019-11478 CVE-2019-11479 CVE-2019-11833
                    CVE-2019-11884 CVE-2019-3846 CVE-2019-5489
                   
Affected Products:
                    SUSE Linux Enterprise Server 12-LTSS
                    SUSE Linux Enterprise Module for Public Cloud 12
______________________________________________________________________________

   An update that solves 9 vulnerabilities and has 7 fixes is
   now available.

Description:


   The SUSE Linux Enterprise 12 kernel version 3.12.61 was updated to receive
   various security and bugfixes.

   The following security bugs were fixed:

   - CVE-2019-11477: A sequence of SACKs may have been crafted by a remote
     attacker such that one can trigger an integer overflow, leading to a
     kernel panic. (bsc#1137586).

   - CVE-2019-11478: It was possible to send a crafted sequence of SACKs
     which would fragment the TCP retransmission queue. A remote attacker may
     have been able to further exploit the fragmented queue to cause an
     expensive linked-list walk for subsequent SACKs received for that same
     TCP connection.

   - CVE-2019-11479: It was possible to send a crafted sequence of SACKs
     which would fragment the RACK send map. A remote attacker may have been
     able to further exploit the fragmented send map to cause an expensive
     linked-list walk for subsequent SACKs received for that same TCP
     connection. This would have resulted in excess resource consumption due
     to low mss values.

   - CVE-2019-3846: A flaw that allowed an attacker to corrupt memory and
     possibly escalate privileges was found in the mwifiex kernel module
     while connecting to a malicious wireless network. (bnc#1136424)

   - CVE-2019-5489: The mincore() implementation in mm/mincore.c in the Linux
     kernel allowed local attackers to observe page cache access patterns of
     other processes on the same system, potentially allowing sniffing of
     secret information. (Fixing this affects the output of the fincore
     program.) Limited remote exploitation may have been possible, as
     demonstrated by latency differences in accessing public files from an
     Apache HTTP Server. (bnc#1120843)

   - CVE-2019-11833: fs/ext4/extents.c in the Linux kernel did not zero out
     the unused memory region in the extent tree block, which might have
     allowed local users to obtain sensitive information by reading
     uninitialized data in the filesystem. (bnc#1135281)

   - CVE-2019-11190: The Linux kernel allowed local users to bypass ASLR on
     setuid programs (such as /bin/su) because install_exec_creds() is called
     too late in load_elf_binary() in fs/binfmt_elf.c, and thus the
     ptrace_may_access() check has a race condition when reading
     /proc/pid/stat. (bnc#1131543)

   - CVE-2019-11884: The do_hidp_sock_ioctl function in
     net/bluetooth/hidp/sock.c in the Linux kernel allowed a local user to
     obtain potentially sensitive information from kernel stack memory via a
     HIDPCONNADD command, because a name field may not end with a '\0'
     character. (bnc#1134848)

   - CVE-2018-17972: An issue was discovered in the proc_pid_stack function
     in fs/proc/base.c in the Linux kernel It did not ensure that only root
     may inspect the kernel stack of an arbitrary task, allowing a local
     attacker to exploit racy stack unwinding and leak kernel task stack
     contents. (bnc#1110785)

   The following non-security bugs were fixed:

   - kabi: drop LINUX_MIB_TCPWQUEUETOOBIG snmp counter (bsc#1137586).
   - lib: add "on"/"off" support to strtobool (bsc#1125931).
   - powerpc/tm: Add commandline option to disable hardware transactional
     memory (bsc#1125580).
   - powerpc/tm: Add TM Unavailable Exception (bsc#1125580).
   - powerpc/tm: Flip the HTM switch default to disabled (bsc#1125580).
   - powerpc/vdso32: fix CLOCK_MONOTONIC on PPC64 (bsc#1131587).
   - powerpc/vdso64: Fix CLOCK_MONOTONIC inconsistencies across Y2038
     (bsc#1131587).
   - tcp: add tcp_min_snd_mss sysctl (bsc#1137586).
   - tcp: enforce tcp_min_snd_mss in tcp_mtu_probing() (bsc#1137586).
   - tcp: limit payload size of sacked skbs (bsc#1137586).
   - tcp: tcp_fragment() should apply sane memory limits (bsc#1137586).


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 12-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-2019-1692=1

   - SUSE Linux Enterprise Module for Public Cloud 12:

      zypper in -t patch SUSE-SLE-Module-Public-Cloud-12-2019-1692=1



Package List:

   - SUSE Linux Enterprise Server 12-LTSS (ppc64le s390x x86_64):

      kernel-default-3.12.61-52.154.1
      kernel-default-base-3.12.61-52.154.1
      kernel-default-base-debuginfo-3.12.61-52.154.1
      kernel-default-debuginfo-3.12.61-52.154.1
      kernel-default-debugsource-3.12.61-52.154.1
      kernel-default-devel-3.12.61-52.154.1
      kernel-syms-3.12.61-52.154.1

   - SUSE Linux Enterprise Server 12-LTSS (noarch):

      kernel-devel-3.12.61-52.154.1
      kernel-macros-3.12.61-52.154.1
      kernel-source-3.12.61-52.154.1

   - SUSE Linux Enterprise Server 12-LTSS (x86_64):

      kernel-xen-3.12.61-52.154.1
      kernel-xen-base-3.12.61-52.154.1
      kernel-xen-base-debuginfo-3.12.61-52.154.1
      kernel-xen-debuginfo-3.12.61-52.154.1
      kernel-xen-debugsource-3.12.61-52.154.1
      kernel-xen-devel-3.12.61-52.154.1
      kgraft-patch-3_12_61-52_154-default-1-1.5.1
      kgraft-patch-3_12_61-52_154-xen-1-1.5.1

   - SUSE Linux Enterprise Server 12-LTSS (s390x):

      kernel-default-man-3.12.61-52.154.1

   - SUSE Linux Enterprise Module for Public Cloud 12 (x86_64):

      kernel-ec2-3.12.61-52.154.1
      kernel-ec2-debuginfo-3.12.61-52.154.1
      kernel-ec2-debugsource-3.12.61-52.154.1
      kernel-ec2-devel-3.12.61-52.154.1
      kernel-ec2-extra-3.12.61-52.154.1
      kernel-ec2-extra-debuginfo-3.12.61-52.154.1


References:

   https://www.suse.com/security/cve/CVE-2018-17972.html
   https://www.suse.com/security/cve/CVE-2019-11190.html
   https://www.suse.com/security/cve/CVE-2019-11477.html
   https://www.suse.com/security/cve/CVE-2019-11478.html
   https://www.suse.com/security/cve/CVE-2019-11479.html
   https://www.suse.com/security/cve/CVE-2019-11833.html
   https://www.suse.com/security/cve/CVE-2019-11884.html
   https://www.suse.com/security/cve/CVE-2019-3846.html
   https://www.suse.com/security/cve/CVE-2019-5489.html
   https://bugzilla.suse.com/1090078
   https://bugzilla.suse.com/1110785
   https://bugzilla.suse.com/1113769
   https://bugzilla.suse.com/1120843
   https://bugzilla.suse.com/1120885
   https://bugzilla.suse.com/1125580
   https://bugzilla.suse.com/1125931
   https://bugzilla.suse.com/1131543
   https://bugzilla.suse.com/1131587
   https://bugzilla.suse.com/1132374
   https://bugzilla.suse.com/1132472
   https://bugzilla.suse.com/1134848
   https://bugzilla.suse.com/1135281
   https://bugzilla.suse.com/1136424
   https://bugzilla.suse.com/1136446
   https://bugzilla.suse.com/1137586

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