Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2018:3230-1
Rating: important
References: #1027519 #1086039 #1089152 #1089635 #1090820 #1090822 #1090823
Cross-References:CVE-2017-5754 CVE-2018-10471 CVE-2018-10472 CVE-2018-8897
Affected Products:
  • SUSE Linux Enterprise Server 12-SP2-BCL

An update that solves four vulnerabilities and has three fixes is now available.

Description:

This update for xen fixes several issues.
These security issues were fixed:

  • CVE-2018-8897: Prevent mishandling of debug exceptions on x86 (XSA-260, bsc#1090820)
  • Handle HPET timers in IO-APIC mode correctly to prevent malicious or buggy HVM guests from causing a hypervisor crash or potentially privilege escalation/information leaks (XSA-261, bsc#1090822)
  • Prevent unbounded loop, induced by qemu allowing an attacker to permanently keep a physical CPU core busy (XSA-262, bsc#1090823)
  • CVE-2018-10472: x86 HVM guest OS users (in certain configurations) were able to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot (bsc#1089152).
  • CVE-2018-10471: x86 PV guest OS users were able to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754 (bsc#1089635).

These non-security issues were fixed:
  • bsc#1086039: Ensure that Dom0 does represent DomU cpu flags correctly
  • bsc#1027519: Fixed shadow mode guests

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-SP2-BCL:
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2018-841=1

Package List:

  • SUSE Linux Enterprise Server 12-SP2-BCL (x86_64):
    • xen-4.7.5_02-43.30.1
    • xen-debugsource-4.7.5_02-43.30.1
    • xen-doc-html-4.7.5_02-43.30.1
    • xen-libs-32bit-4.7.5_02-43.30.1
    • xen-libs-4.7.5_02-43.30.1
    • xen-libs-debuginfo-32bit-4.7.5_02-43.30.1
    • xen-libs-debuginfo-4.7.5_02-43.30.1
    • xen-tools-4.7.5_02-43.30.1
    • xen-tools-debuginfo-4.7.5_02-43.30.1
    • xen-tools-domU-4.7.5_02-43.30.1
    • xen-tools-domU-debuginfo-4.7.5_02-43.30.1

References: