SUSE-SU-2019:0740-1: important: Security update for the Linux Kernel (Live Patch 1 for SLE 15)

[sle-security-updates at lists.suse.com]

   SUSE Security Update: Security update for the Linux Kernel (Live Patch 1 for SLE 15)
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Announcement ID:    SUSE-SU-2019:0740-1
Rating:             important
References:         #1124729 #1124734 #1126284 #1127757 #1128378 
                    
Cross-References:   CVE-2018-12232 CVE-2019-6974 CVE-2019-7221
                    CVE-2019-8912 CVE-2019-9213
Affected Products:
                    SUSE Linux Enterprise Module for Live Patching 15
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   An update that fixes 5 vulnerabilities is now available.

Description:

   This update for the Linux Kernel 4.12.14-25_3 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-2019-8912: af_alg_release() in crypto/af_alg.c neglected to set a
     NULL value for a certain structure member, which could have led to a
     use-after-free in sockfs_setattr (bsc#1126284).
   - CVE-2018-12232: In net/socket.c there was a race condition between
     fchownat and close in cases where they target the same socket file
     descriptor, related to the sock_close and sockfs_setattr functions.
     fchownat did not increment the file descriptor reference count, which
     allowed close to set the socket to NULL during fchownat's execution,
     leading to a NULL pointer dereference and system crash (bsc#1127757).
   - 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).


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 Module for Live Patching 15:

      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2019-740=1 SUSE-SLE-Module-Live-Patching-15-2019-746=1



Package List:

   - SUSE Linux Enterprise Module for Live Patching 15 (ppc64le x86_64):

      kernel-livepatch-4_12_14-23-default-9-25.2
      kernel-livepatch-4_12_14-23-default-debuginfo-9-25.2
      kernel-livepatch-4_12_14-25_3-default-8-2.1
      kernel-livepatch-4_12_14-25_3-default-debuginfo-8-2.1
      kernel-livepatch-SLE15_Update_0-debugsource-9-25.2


References:

   https://www.suse.com/security/cve/CVE-2018-12232.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-2019-8912.html
   https://www.suse.com/security/cve/CVE-2019-9213.html
   https://bugzilla.suse.com/1124729
   https://bugzilla.suse.com/1124734
   https://bugzilla.suse.com/1126284
   https://bugzilla.suse.com/1127757
   https://bugzilla.suse.com/1128378