Sicherheit: Mehrere Probleme in Linux - Pro-Linux

   SUSE Security Update: Security update for the Linux Kernel
______________________________________________________________________________

Announcement ID:    SUSE-SU-2019:1534-1
Rating:             important
References:         #1099658 #1106284 #1110785 #1113769 #1120843 
                    #1120885 #1131543 #1131565 #1132374 #1132472 
                    #1134537 #1134596 #1134848 #1135281 #1135603 
                    #1136424 #1136446 #1136586 #1136935 #1137586 

Cross-References:   CVE-2018-17972 CVE-2018-7191 CVE-2019-11190
                    CVE-2019-11477 CVE-2019-11478 CVE-2019-11479
                    CVE-2019-11815 CVE-2019-11833 CVE-2019-11884
                    CVE-2019-12382 CVE-2019-3846 CVE-2019-5489

Affected Products:
                    SUSE OpenStack Cloud 7
                    SUSE Linux Enterprise Server for SAP 12-SP2
                    SUSE Linux Enterprise Server 12-SP2-LTSS
                    SUSE Linux Enterprise Server 12-SP2-BCL
                    SUSE Linux Enterprise High Availability 12-SP2
                    SUSE Enterprise Storage 4
                    OpenStack Cloud Magnum Orchestration 7
______________________________________________________________________________

   An update that solves 12 vulnerabilities and has 8 fixes is
   now available.

Description:

   The SUSE Linux Enterprise 12 SP2 kernel version 4.4.121 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 be 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-2019-12382: An issue was discovered in drm_load_edid_firmware in
     drivers/gpu/drm/drm_edid_load.c in the Linux kernel There is an
     unchecked kstrdup of fwstr, which may have allowed an attacker to cause
     a denial of service (NULL pointer dereference and system crash).
     (bnc#1136586)

   - 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-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. This is similar to CVE-2013-4343. (bnc#1135603)

   - 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 had a race condition when reading
     /proc/pid/stat. (bnc#1131543)

   - CVE-2019-11815: An issue was discovered in rds_tcp_kill_sock in
     net/rds/tcp.c in the Linux kernel There was a race condition leading to
     a use-after-free, related to net namespace cleanup. (bnc#1134537)

   - 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 have ended 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:

   - cifs: keep FileInfo handle live during oplock break (bsc#1106284,
     bsc#1131565).
   - ftrace/x86_64: Emulate call function while updating in breakpoint
     handler (bsc#1099658).
   - kabi: drop LINUX_MIB_TCPWQUEUETOOBIG snmp counter (bsc#1137586).
   - kabi: move sysctl_tcp_min_snd_mss to preserve struct net layout
     (bsc#1137586).
   - mwifiex: Fix heap overflow in mwifiex_uap_parse_tail_ies() (bsc#1136935).
   - 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).
   - x86_64: Add gap to int3 to allow for call emulation (bsc#1099658).
   - x86_64: Allow breakpoints to emulate call instructions (bsc#1099658).
   - xen-swiotlb: fix the check condition for xen_swiotlb_free_coherent
     (bnc#1134596).
   - xen-swiotlb: use actually allocated size on check physical continuous
     (bnc#1134596).

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 OpenStack Cloud 7:

      zypper in -t patch SUSE-OpenStack-Cloud-7-2019-1534=1

   - SUSE Linux Enterprise Server for SAP 12-SP2:

      zypper in -t patch SUSE-SLE-SAP-12-SP2-2019-1534=1

   - SUSE Linux Enterprise Server 12-SP2-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-2019-1534=1

   - SUSE Linux Enterprise Server 12-SP2-BCL:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2019-1534=1

   - SUSE Linux Enterprise High Availability 12-SP2:

      zypper in -t patch SUSE-SLE-HA-12-SP2-2019-1534=1

   - SUSE Enterprise Storage 4:

      zypper in -t patch SUSE-Storage-4-2019-1534=1

   - OpenStack Cloud Magnum Orchestration 7:

      zypper in -t patch
 SUSE-OpenStack-Cloud-Magnum-Orchestration-7-2019-1534=1

Package List:

   - SUSE OpenStack Cloud 7 (s390x x86_64):

      kernel-default-4.4.121-92.114.1
      kernel-default-base-4.4.121-92.114.1
      kernel-default-base-debuginfo-4.4.121-92.114.1
      kernel-default-debuginfo-4.4.121-92.114.1
      kernel-default-debugsource-4.4.121-92.114.1
      kernel-default-devel-4.4.121-92.114.1
      kernel-syms-4.4.121-92.114.1

   - SUSE OpenStack Cloud 7 (x86_64):

      kgraft-patch-4_4_121-92_114-default-1-3.5.1

   - SUSE OpenStack Cloud 7 (noarch):

      kernel-devel-4.4.121-92.114.1
      kernel-macros-4.4.121-92.114.1
      kernel-source-4.4.121-92.114.1

   - SUSE OpenStack Cloud 7 (s390x):

      kernel-default-man-4.4.121-92.114.1

   - SUSE Linux Enterprise Server for SAP 12-SP2 (ppc64le x86_64):

      kernel-default-4.4.121-92.114.1
      kernel-default-base-4.4.121-92.114.1
      kernel-default-base-debuginfo-4.4.121-92.114.1
      kernel-default-debuginfo-4.4.121-92.114.1
      kernel-default-debugsource-4.4.121-92.114.1
      kernel-default-devel-4.4.121-92.114.1
      kernel-syms-4.4.121-92.114.1
      kgraft-patch-4_4_121-92_114-default-1-3.5.1

   - SUSE Linux Enterprise Server for SAP 12-SP2 (noarch):

      kernel-devel-4.4.121-92.114.1
      kernel-macros-4.4.121-92.114.1
      kernel-source-4.4.121-92.114.1

   - SUSE Linux Enterprise Server 12-SP2-LTSS (ppc64le s390x x86_64):

      kernel-default-4.4.121-92.114.1
      kernel-default-base-4.4.121-92.114.1
      kernel-default-base-debuginfo-4.4.121-92.114.1
      kernel-default-debuginfo-4.4.121-92.114.1
      kernel-default-debugsource-4.4.121-92.114.1
      kernel-default-devel-4.4.121-92.114.1
      kernel-syms-4.4.121-92.114.1

   - SUSE Linux Enterprise Server 12-SP2-LTSS (ppc64le x86_64):

      kgraft-patch-4_4_121-92_114-default-1-3.5.1

   - SUSE Linux Enterprise Server 12-SP2-LTSS (noarch):

      kernel-devel-4.4.121-92.114.1
      kernel-macros-4.4.121-92.114.1
      kernel-source-4.4.121-92.114.1

   - SUSE Linux Enterprise Server 12-SP2-LTSS (s390x):

      kernel-default-man-4.4.121-92.114.1

   - SUSE Linux Enterprise Server 12-SP2-BCL (x86_64):

      kernel-default-4.4.121-92.114.1
      kernel-default-base-4.4.121-92.114.1
      kernel-default-base-debuginfo-4.4.121-92.114.1
      kernel-default-debuginfo-4.4.121-92.114.1
      kernel-default-debugsource-4.4.121-92.114.1
      kernel-default-devel-4.4.121-92.114.1
      kernel-syms-4.4.121-92.114.1

   - SUSE Linux Enterprise Server 12-SP2-BCL (noarch):

      kernel-devel-4.4.121-92.114.1
      kernel-macros-4.4.121-92.114.1
      kernel-source-4.4.121-92.114.1

   - SUSE Linux Enterprise High Availability 12-SP2 (ppc64le s390x x86_64):

      cluster-md-kmp-default-4.4.121-92.114.1
      cluster-md-kmp-default-debuginfo-4.4.121-92.114.1
      cluster-network-kmp-default-4.4.121-92.114.1
      cluster-network-kmp-default-debuginfo-4.4.121-92.114.1
      dlm-kmp-default-4.4.121-92.114.1
      dlm-kmp-default-debuginfo-4.4.121-92.114.1
      gfs2-kmp-default-4.4.121-92.114.1
      gfs2-kmp-default-debuginfo-4.4.121-92.114.1
      kernel-default-debuginfo-4.4.121-92.114.1
      kernel-default-debugsource-4.4.121-92.114.1
      ocfs2-kmp-default-4.4.121-92.114.1
      ocfs2-kmp-default-debuginfo-4.4.121-92.114.1

   - SUSE Enterprise Storage 4 (noarch):

      kernel-devel-4.4.121-92.114.1
      kernel-macros-4.4.121-92.114.1
      kernel-source-4.4.121-92.114.1

   - SUSE Enterprise Storage 4 (x86_64):

      kernel-default-4.4.121-92.114.1
      kernel-default-base-4.4.121-92.114.1
      kernel-default-base-debuginfo-4.4.121-92.114.1
      kernel-default-debuginfo-4.4.121-92.114.1
      kernel-default-debugsource-4.4.121-92.114.1
      kernel-default-devel-4.4.121-92.114.1
      kernel-syms-4.4.121-92.114.1
      kgraft-patch-4_4_121-92_114-default-1-3.5.1

   - OpenStack Cloud Magnum Orchestration 7 (x86_64):

      kernel-default-4.4.121-92.114.1
      kernel-default-debuginfo-4.4.121-92.114.1
      kernel-default-debugsource-4.4.121-92.114.1

References:

   https://www.suse.com/security/cve/CVE-2018-17972.html
   https://www.suse.com/security/cve/CVE-2018-7191.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-2019-11815.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-2019-12382.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/1099658
   https://bugzilla.suse.com/1106284
   https://bugzilla.suse.com/1110785
   https://bugzilla.suse.com/1113769
   https://bugzilla.suse.com/1120843
   https://bugzilla.suse.com/1120885
   https://bugzilla.suse.com/1131543
   https://bugzilla.suse.com/1131565
   https://bugzilla.suse.com/1132374
   https://bugzilla.suse.com/1132472
   https://bugzilla.suse.com/1134537
   https://bugzilla.suse.com/1134596
   https://bugzilla.suse.com/1134848
   https://bugzilla.suse.com/1135281
   https://bugzilla.suse.com/1135603
   https://bugzilla.suse.com/1136424
   https://bugzilla.suse.com/1136446
   https://bugzilla.suse.com/1136586
   https://bugzilla.suse.com/1136935
   https://bugzilla.suse.com/1137586

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