SUSE Security Update: Security update for Linux Kernel Live Patch 4 for SLE 12 SP2
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Announcement ID:    SUSE-SU-2017:2065-1
Rating:             important
References:         #1027575 #1038564 #1042364 #1042892 #1046191 
                    #1046202 #1046206 #1050751 
Cross-References:   CVE-2017-2636 CVE-2017-7533 CVE-2017-7645
                    CVE-2017-8797 CVE-2017-8890 CVE-2017-9077
                    CVE-2017-9242
Affected Products:
                    SUSE Linux Enterprise Live Patching 12
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   An update that solves 7 vulnerabilities and has one errata
   is now available.

Description:

   This update for the Linux Kernel 4.4.38-93 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-2017-8797: The NFSv4 server in the Linux kernel did not properly
     validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or
     LAYOUTGET operand in a UDP packet from a remote attacker. This type
     value is uninitialized upon encountering certain error conditions. This
     value is used as an array index for dereferencing, which leads to an
     OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system
     (bsc#1046202)
   - 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).
   - 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).
   - CVE-2017-9077: The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c
     in the Linux kernel mishandled inheritance, which allowed local users to
     cause a denial of service or possibly have unspecified other impact via
     crafted system calls, a related issue to CVE-2017-8890 (bsc#1042364).
   - CVE-2017-8890: The inet_csk_clone_lock function in
     net/ipv4/inet_connection_sock.c in the Linux kernel allowed attackers to
     cause a denial of service (double free) or possibly have unspecified
     other impact by leveraging use of the accept system call (bsc#1038564).


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 Live Patching 12:

      zypper in -t patch SUSE-SLE-Live-Patching-12-2017-1267=1

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


Package List:

   - SUSE Linux Enterprise Live Patching 12 (x86_64):

      kgraft-patch-4_4_38-93-default-7-2.1


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-2017-8797.html
   https://www.suse.com/security/cve/CVE-2017-8890.html
   https://www.suse.com/security/cve/CVE-2017-9077.html
   https://www.suse.com/security/cve/CVE-2017-9242.html
   https://bugzilla.suse.com/1027575
   https://bugzilla.suse.com/1038564
   https://bugzilla.suse.com/1042364
   https://bugzilla.suse.com/1042892
   https://bugzilla.suse.com/1046191
   https://bugzilla.suse.com/1046202
   https://bugzilla.suse.com/1046206
   https://bugzilla.suse.com/1050751