ESB-2019.1105 - [SUSE] linux kernel: Multiple vulnerabilities 2019-04-03

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.1105
         SUSE-SU-2019:0845-1 Security update for the Linux Kernel
                         (Live Patch 8 for SLE 15)
                               3 April 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           linux kernel
Publisher:         SUSE
Operating System:  SUSE
Impact/Access:     Root Compromise   -- Existing Account      
                   Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-9213 CVE-2019-8912 CVE-2019-7221
                   CVE-2019-6974  

Reference:         ESB-2019.1097
                   ESB-2019.1081
                   ESB-2019.1035
                   ESB-2019.1025.2
                   ESB-2019.1005
                   ESB-2019.1004
                   ESB-2019.0984

Original Bulletin: 
   https://www.suse.com/support/update/announcement/2019/suse-su-20190845-1.html

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SUSE Security Update: Security update for the Linux Kernel (Live Patch 8 for SLE 15)

______________________________________________________________________________

Announcement ID:   SUSE-SU-2019:0845-1
Rating:            important
References:        #1124729 #1124734 #1126284 #1128378
Cross-References:  CVE-2019-6974 CVE-2019-7221 CVE-2019-8912 CVE-2019-9213
Affected Products:
                   SUSE Linux Enterprise Module for Live Patching 15
______________________________________________________________________________


An update that fixes four vulnerabilities is now available.

Description:

This update for the Linux Kernel 4.12.14-25_28 fixes several issues.
The following security issues were fixed:

  o 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).
  o 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).
  o 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).
  o 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:

  o SUSE Linux Enterprise Module for Live Patching 15:
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2019-844=1
    SUSE-SLE-Module-Live-Patching-15-2019-845=1

Package List:

  o SUSE Linux Enterprise Module for Live Patching 15 (ppc64le x86_64):
       kernel-livepatch-4_12_14-25_25-default-3-2.1
       kernel-livepatch-4_12_14-25_25-default-debuginfo-3-2.1
       kernel-livepatch-4_12_14-25_28-default-2-2.1
       kernel-livepatch-4_12_14-25_28-default-debuginfo-2-2.1


References:

  o https://www.suse.com/security/cve/CVE-2019-6974.html
  o https://www.suse.com/security/cve/CVE-2019-7221.html
  o https://www.suse.com/security/cve/CVE-2019-8912.html
  o https://www.suse.com/security/cve/CVE-2019-9213.html
  o https://bugzilla.suse.com/1124729
  o https://bugzilla.suse.com/1124734
  o https://bugzilla.suse.com/1126284
  o https://bugzilla.suse.com/1128378

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