SUSE Security Update: Security update for Linux Kernel Live Patch 19 for SLE 12
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Announcement ID:    SUSE-SU-2017:2096-1
Rating:             important
References:         #1027575 #1042892 #1044878 #1046191 #1050751 
                    
Cross-References:   CVE-2017-2636 CVE-2017-7533 CVE-2017-7645
                    CVE-2017-9242
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 3.12.61-52_66 fixes several issues.

   The following security bugs were fixed:

   - CVE-2017-7533: A bug in inotify code allowed local users to escalate
     privilege (bsc#1050751).
   - CVE-2017-7645: The NFSv2/NFSv3 server in the nfsd subsystem in the Linux
     kernel allowed remote attackers to cause a denial of service (system
     crash) via a long RPC reply, related to net/sunrpc/svc.c,
     fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c (bsc#1046191).
   - CVE-2017-2636: Race condition in drivers/tty/n_hdlc.c in the Linux
     kernel allowed local users to gain privileges or cause a denial of
     service (double free) by setting the HDLC line discipline (bsc#1027575).
   - A SUSE Linux Enterprise specific regression in tearing down network
     namespaces was fixed (bsc#1044878)
   - CVE-2017-9242: The __ip6_append_data function in net/ipv6/ip6_output.c
     in the Linux kernel is too late in checking whether an overwrite of an
     skb data structure may occur, which allowed local users to cause a
     denial of service (system crash) via crafted system calls (bsc#1042892).


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-12-2017-1298=1

   - SUSE Linux Enterprise Server 12-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-2017-1298=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_61-52_66-default-6-2.1
      kgraft-patch-3_12_61-52_66-xen-6-2.1

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

      kgraft-patch-3_12_61-52_66-default-6-2.1
      kgraft-patch-3_12_61-52_66-xen-6-2.1


References:

   https://www.suse.com/security/cve/CVE-2017-2636.html
   https://www.suse.com/security/cve/CVE-2017-7533.html
   https://www.suse.com/security/cve/CVE-2017-7645.html
   https://www.suse.com/security/cve/CVE-2017-9242.html
   https://bugzilla.suse.com/1027575
   https://bugzilla.suse.com/1042892
   https://bugzilla.suse.com/1044878
   https://bugzilla.suse.com/1046191
   https://bugzilla.suse.com/1050751