SUSE Security Update: Security update for Linux Kernel Live Patch 12 for SLE 12
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Announcement ID:    SUSE-SU-2017:0244-1
Rating:             important
References:         #1012852 #1013543 #1013604 #1014271 #1017589 
                    
Cross-References:   CVE-2016-8632 CVE-2016-9576 CVE-2016-9794
                    CVE-2016-9806
Affected Products:
                    SUSE Linux Enterprise Server for SAP 12
                    SUSE Linux Enterprise Server 12-LTSS
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   An update that solves four vulnerabilities and has one
   errata is now available.

Description:

   This update for the Linux Kernel 3.12.55-52_42 fixes several issues.

   The following security bugs were fixed:
   - CVE-2016-9806: Race condition in the netlink_dump function in
     net/netlink/af_netlink.c in the Linux kernel allowed local users to
     cause a denial of service (double free) or possibly have unspecified
     other impact via a crafted application that made sendmsg system calls,
     leading to a free operation associated with a new dump that started
     earlier than anticipated (bsc#1017589).
   - CVE-2016-9794: Race condition in the snd_pcm_period_elapsed function in
     sound/core/pcm_lib.c in the ALSA subsystem in the Linux kernel allowed
     local users to cause a denial of service (use-after-free) or possibly
     have unspecified other impact via a crafted SNDRV_PCM_TRIGGER_START
     command (bsc#1013543).
   - CVE-2016-8632: The tipc_msg_build function in net/tipc/msg.c in the
     Linux kernel did not validate the relationship between the minimum
     fragment length and the maximum packet size, which allowed local users     to gain privileges or cause a denial of service (heap-based buffer
     overflow) by leveraging the CAP_NET_ADMIN capability (bsc#1012852).
   - CVE-2016-9576: The blk_rq_map_user_iov function in block/blk-map.c in
     the Linux kernel did not properly restrict the type of iterator, which
     allowed local users to read or write to arbitrary kernel memory
     locations or cause a denial of service (use-after-free) by leveraging
     access to a /dev/sg device (bsc#1014271).


Patch Instructions:

   To install this SUSE Security Update use YaST online_update.
   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Server for SAP 12:

      zypper in -t patch SUSE-SLE-SAP-12-2017-130=1

   - SUSE Linux Enterprise Server 12-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-2017-130=1

   To bring your system up-to-date, use "zypper patch".


Package List:

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

      kgraft-patch-3_12_55-52_42-default-5-2.1
      kgraft-patch-3_12_55-52_42-xen-5-2.1

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

      kgraft-patch-3_12_55-52_42-default-5-2.1
      kgraft-patch-3_12_55-52_42-xen-5-2.1


References:

   https://www.suse.com/security/cve/CVE-2016-8632.html
   https://www.suse.com/security/cve/CVE-2016-9576.html
   https://www.suse.com/security/cve/CVE-2016-9794.html
   https://www.suse.com/security/cve/CVE-2016-9806.html
   https://bugzilla.suse.com/1012852
   https://bugzilla.suse.com/1013543
   https://bugzilla.suse.com/1013604
   https://bugzilla.suse.com/1014271
   https://bugzilla.suse.com/1017589