SUSE-SU-2018:3172-1: important: Security update for the Linux Kernel (Live Patch 31 for SLE 12 SP1)

[sle-security-updates at lists.suse.com]

   SUSE Security Update: Security update for the Linux Kernel (Live Patch 31 for SLE 12 SP1)
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Announcement ID:    SUSE-SU-2018:3172-1
Rating:             important
References:         #1102682 #1107832 #1110233 
Cross-References:   CVE-2018-14633 CVE-2018-17182 CVE-2018-5390
                   
Affected Products:
                    SUSE Linux Enterprise Server 12-SP1-LTSS
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   An update that fixes three vulnerabilities is now available.

Description:

   This update for the Linux Kernel 3.12.74-60_64_104 fixes several issues.

   The following security issues were fixed:

   - CVE-2018-17182: The vmacache_flush_all function in mm/vmacache.c
     mishandled sequence number overflows. An attacker can trigger a
     use-after-free (and possibly gain privileges) via certain thread
     creation, map, unmap, invalidation, and dereference operations
     (bsc#1110233).
   - CVE-2018-14633: A security flaw was found in the
     chap_server_compute_md5() function in the ISCSI target code in a way an
     authentication request from an ISCSI initiator is processed. An
     unauthenticated remote attacker can cause a stack buffer overflow and
     smash up to 17 bytes of the stack. The attack requires the iSCSI target
     to be enabled on the victim host. Depending on how the target's code was
     built (i.e. depending on a compiler, compile flags and hardware
     architecture) an attack may lead to a system crash and thus to a
     denial-of-service or possibly to a non-authorized access to data
     exported by an iSCSI target. Due to the nature of the flaw, privilege
     escalation cannot be fully ruled out, although we believe it is highly
     unlikely. (bsc#1107832).
   - CVE-2018-5390: The Linux kernel could be forced to make very expensive
     calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every
     incoming packet which can lead to a denial of service (bsc#1102682).


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:

   - SUSE Linux Enterprise Server 12-SP1-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP1-2018-2274=1



Package List:

   - SUSE Linux Enterprise Server 12-SP1-LTSS (x86_64):

      kgraft-patch-3_12_74-60_64_104-default-2-2.1
      kgraft-patch-3_12_74-60_64_104-xen-2-2.1


References:

   https://www.suse.com/security/cve/CVE-2018-14633.html
   https://www.suse.com/security/cve/CVE-2018-17182.html
   https://www.suse.com/security/cve/CVE-2018-5390.html
   https://bugzilla.suse.com/1102682
   https://bugzilla.suse.com/1107832
   https://bugzilla.suse.com/1110233