SUSE Security Update: Security update for xen
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Announcement ID:    SUSE-SU-2019:3309-1
Rating:             important
References:         #1154460 #1154464 #1157888 #1158003 #1158004 
                    #1158005 #1158006 #1158007 
Cross-References:   CVE-2019-18422 CVE-2019-18423 CVE-2019-19577
                    CVE-2019-19578 CVE-2019-19579 CVE-2019-19580
                    CVE-2019-19581 CVE-2019-19582 CVE-2019-19583
                   
Affected Products:
                    SUSE Linux Enterprise Module for Server Applications 15
                    SUSE Linux Enterprise Module for Basesystem 15
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   An update that fixes 9 vulnerabilities is now available.

Description:

   This update for xen fixes the following issues:

   - CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm
     (bsc#1158003 XSA-307).
   - CVE-2019-19582: Fixed a potential infinite loop when x86 accesses to
     bitmaps with a compile time known size of 64 (bsc#1158003 XSA-307).
   - CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH
     guest userspace code to crash the guest,leading to a guest denial of
     service (bsc#1158004 XSA-308).
   - CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could
     have caused hypervisor crash resulting in denial of service affecting
     the entire host (bsc#1158005 XSA-309).
   - CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest
     administrator could have been able to escalate their privilege to that
     of the host (bsc#1158006 XSA-310).
   - CVE-2019-19577: Fixed an issue where a malicious guest administrator
     could have caused Xen to access data structures while they are being
     modified leading to a crash (bsc#1158007 XSA-311).
   - CVE-2019-19579: Fixed a privilege escaltion where an untrusted domain
     with access to a physical device can DMA into host memory (bsc#1157888
     XSA-306).
   - CVE-2019-18423: A malicious guest administrator may cause a hypervisor
     crash, resulting in a Denial of Service (DoS) (bsc#1154460 XSA-301).
   - CVE-2019-18422: A malicious ARM guest might contrive to arrange for
     critical Xen code to run with interrupts erroneously enabled. This could
     lead to data corruption, denial of service, or possibly even privilege
     escalation. However a precise attack technique has not been identified.
     (bsc#1154464 XSA-303)


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 Module for Server Applications 15:

      zypper in -t patch SUSE-SLE-Module-Server-Applications-15-2019-3309=1

   - SUSE Linux Enterprise Module for Basesystem 15:

      zypper in -t patch SUSE-SLE-Module-Basesystem-15-2019-3309=1



Package List:

   - SUSE Linux Enterprise Module for Server Applications 15 (x86_64):

      xen-4.10.4_08-3.28.1
      xen-debugsource-4.10.4_08-3.28.1
      xen-devel-4.10.4_08-3.28.1
      xen-tools-4.10.4_08-3.28.1
      xen-tools-debuginfo-4.10.4_08-3.28.1

   - SUSE Linux Enterprise Module for Basesystem 15 (x86_64):

      xen-debugsource-4.10.4_08-3.28.1
      xen-libs-4.10.4_08-3.28.1
      xen-libs-debuginfo-4.10.4_08-3.28.1
      xen-tools-domU-4.10.4_08-3.28.1
      xen-tools-domU-debuginfo-4.10.4_08-3.28.1


References:

   https://www.suse.com/security/cve/CVE-2019-18422.html
   https://www.suse.com/security/cve/CVE-2019-18423.html
   https://www.suse.com/security/cve/CVE-2019-19577.html
   https://www.suse.com/security/cve/CVE-2019-19578.html
   https://www.suse.com/security/cve/CVE-2019-19579.html
   https://www.suse.com/security/cve/CVE-2019-19580.html
   https://www.suse.com/security/cve/CVE-2019-19581.html
   https://www.suse.com/security/cve/CVE-2019-19582.html
   https://www.suse.com/security/cve/CVE-2019-19583.html
   https://bugzilla.suse.com/1154460
   https://bugzilla.suse.com/1154464
   https://bugzilla.suse.com/1157888
   https://bugzilla.suse.com/1158003
   https://bugzilla.suse.com/1158004
   https://bugzilla.suse.com/1158005
   https://bugzilla.suse.com/1158006
   https://bugzilla.suse.com/1158007

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