SUSE Security Update: Security update for the Linux Kernel (Live Patch 28 for SLE 12)
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Announcement ID:    SUSE-SU-2017:3307-1
Rating:             important
References:         #1064388 #1064392 #1069708 
Cross-References:   CVE-2017-15649 CVE-2017-16939
Affected Products:
                    SUSE Linux Enterprise Server 12-LTSS
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   An update that solves two vulnerabilities and has one
   errata is now available.

Description:

   This update for the Linux Kernel 3.12.61-52_101 fixes several issues.

   The following security issues were fixed:

   - CVE-2017-16939: The XFRM dump policy implementation in
     net/xfrm/xfrm_user.c allowed local users to gain privileges or cause a
     denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt
     system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages
     (bsc#1069708).
   - CVE-2017-15649: net/packet/af_packet.c allowed local users to gain
     privileges via crafted system calls that trigger mishandling of
     packet_fanout data structures, because of a race condition (involving
     fanout_add and packet_do_bind) that leads to a use-after-free
     (bsc#1064392).


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 12-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-2017-2061=1

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


Package List:

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

      kgraft-patch-3_12_61-52_101-default-2-2.1
      kgraft-patch-3_12_61-52_101-xen-2-2.1


References:

   https://www.suse.com/security/cve/CVE-2017-15649.html
   https://www.suse.com/security/cve/CVE-2017-16939.html
   https://bugzilla.suse.com/1064388
   https://bugzilla.suse.com/1064392
   https://bugzilla.suse.com/1069708